Two Late Ordovician cornulitid species, Cornulites richmondensis (Miller, 1874) and Cornulites hemistriatus new species, from the Ellis Bay and Vaureal formations of Anticosti Island, eastern Canada, are each shown in this study to have a thick, punctate, cross-bladed lamellar, calcitic conch wall, a crested fold, a septate juvenile part, and endoconic chamber deposit. These Late Ordovician, free-living (i.e., nonencrusting) forms of Cornulites Schlotheim, 1820 have characters intermediate between Cornulites and the late Silurian-Devonian forms of Tentaculites Schlotheim, 1820, particularly by having incipient inner layers and poorly fused annuli, but lacking cornulitid-type vesicular microstructures. The described cornulitids are similar to brachiopods in their cross-bladed lamellae and pseudopunctae, but their lamellar layers are considerably finer and much less distinct than those of brachiopod shells.

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The study documents the embryonic and larval development of Clarias dussumieri, a Near-Threatened, cultivable, and highly valued food fish endemic to the Western Ghats. Induced breeding facilitated detailed observation of developmental stages using light microscopy. Unfertilized eggs measured 1.5 ± 0.02 mm in diameter and enlarged to 1.7 ± 0.10 mm after fertilization (∼13% increase). The first cleavage occurred at 00:36 ± 00:02 h, reaching 64 cells by 01:35 ± 00:06 h. Epiboly progressed from 30% at 03:20 ± 00:10 h to 50% at 04:30 ± 00:05 h and 90% at 05:50 ± 00:10 h; neurulation was evident by 07:40 ± 01:10 h and somites by 11:08 ± 01:26 h. The first heartbeat appeared during the pharyngula period (17:25 ± 01:30 h), and hatching occurred at 25:30 ± 01:30 h at 26–27°C. Hatched larvae were 4.2 ± 0.02 mm total length, observed few melanophores by 12 h, conspicuous eye pigmentation by 24 h, and body pigmentation spreading by day 2 (5.90 ± 0.04 mm).The yolk sac was fully absorbed by 72 ± 2.50 h post-hatching, marking the onset of exogenous feeding. By day 4 (pre-flexion), larvae reached 7.1 ± 0.02 mm; initial notochord flexion began around day 7 and post-flexion from day 10, with juvenile-like morphology evident by day 25 (15.27–17.80 mm). The standardized timelines and measurements provide a baseline for hatchery practice and conservation aquaculture of C. dussumieri, supporting protocol refinement for improving survival and growth under controlled conditions

In this article, we study the pressure at infinity of potentials defined over countable Markov shifts. We establish an upper semi-continuity result concerning the limiting behaviour of the pressure of invariant probability measures, where the escape of mass is controlled by the pressure at infinity. As a consequence, we establish criteria for the existence of equilibrium states and maximizing measures for uniformly continuous potentials. Additionally, we study the pressure at infinity of suspension flows defined over countable Markov shifts and prove an upper semi-continuity result for the pressure map.

This article considers British early nineteenth century attempts to reclaim Sagar Island, at the southwestern extremity of the Bengal delta, by clearing the island of jungle and settling and cultivating it—a project led first by colonial authorities at Calcutta and then by a joint-stock company established for the purpose, the Sagar Island Society. It considers the motivations behind the reclamation attempts, what they involved, and why they failed. The consequences – economic, human, and ecological—of the reclamation attempts are examined. The article reconstructs the almost entirely unknown history of events on Sagar Island from 1810 to 1833 through extensive new archival research and the study of rarely consulted publications from the period, before exploring their implications. In doing so, it sheds new light on the nature of British colonial capitalism and the environmental impact of British colonial interventions in South Asia, contributing to our understanding of the economic and environmental history of colonial Bengal and of the wider British imperial world. The article contends that events on Sagar Island offer a cautionary lesson about public and private initiatives to extend the frontiers of revenue extraction, and about the hubris of human efforts to ‘improve’ natural environments through large-scale projects of transformation. New insights are offered into the collusion between government and capital in British Bengal between the East India Company charter acts of 1813 and 1833, and into the colonial and capitalist origins of the Anthropocene.

Survivorship among individuals with CHD has expanded, bringing more pregnancies into routine care. In this issue, a single-centre retrospective case–control study (162 CHD deliveries vs 321 controls) reports higher composite maternal cardiac events (8.6 vs 3.4%; risk ratio 2.5, 95% CI 1.2–5.4), greater use of operative or assisted delivery, and an approximately doubled length of stay. Modified WHO class correlates with length of stay but not with discrete cardiac events; maternal age independently predicts cardiac events; rates of pre-eclampsia are lower in CHD. These findings support first-trimester cardio-obstetric triage, standardised delivery bundles, and capacity planning that uses risk class to anticipate monitoring needs, with routine 6–12-week postpartum review. Limitations include selection, era differences, and modest sample size. Overall, anticipatory planning and disciplined intrapartum decision-making remain key to safe, resource-aware care for pregnant women with CHD.