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II.—Notes on Phyllopodiform Crustaceans, referable to the Genus Echinocaris, from the Palæozoic Rocks
Published online by Cambridge University Press: 01 May 2009
Extract
In 1863 Professor James Hall described and figured three abdominal segments, with the telson and its appendages, of a Ceratiocaridal Crustacean, characterized by its relatively large size (about 100 mm. long, and from 10 to 15 broad) and by the presence of strong spines on the distal upper edge of each segment [see annexed Plate, Fig. 2]. This form, from the shales of the Hamilton group (Devonian) of Ontario County, N.Y., he referred with doubt to Ceratiocaris, and gave it the specific name “armatus.” At the same time Prof. Hall described and figured some separate caudal spines, from the Genessee Slate, Ontario Co., as C. ? longicaudus, of which his figs. 4, 5 and 6 may be the same as those of C. ? armatus; whilst fig. 7 seems to be two small body-segements and caudal spines of some other Phyllopod. To these Prof. Hall added, in the same plate, the figure of a relatively large Leperditioid carapacevalve, doubtfully referred to Ceratiocaris as C. ? punctatus, from the Hamilton Group, east shore of Cayuga Lake, N.Y.
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References
page 393 note 1 “Sixteenth Report State Cab. New York,” etc. Appendix D, p. 72, pl. 1, figs. 1, 2, 3.
page 393 note 2 Op. cit. p. 73, pl. 1, figs. 4–7.
page 393 note 3 Op. cit. p. 74, pl. 1, fig. 8.
page 394 note 1 “Devonian Crustaceans,”, prepared for the “Palaeontology of Ohio,” vol. iii.Google Scholar
page 395 note 1 Mr. Whitfield and J. M. Clarke duly recognize this word as feminine, just as Ceratiocaris, and all the names formed with χapis, ought to be regarded, although often otherwise treated.