. Annals of the New York Academy of Sciences. Science; Science -- New York (State). North American Palaeozoic Crustacea. 33 Plumulites, Barrande, 1872; Syst. Sil. Boheme, Suppl., vol. 1, p. 5(55. Devonicus. Clarke, 1882; Am. Journ. Sci., 3d series, vol. 24, p. 55, figs. 1, 2. Hamilton. Jamesi, Hall & Whitfield, 1875; Pal. Ohio, vol. 2, p. 106, pi. 4, figs. 1-3. Hudson River. ? Jamesi, Miller, 1875 ; Cincinnati Quart. .Jour. Sei., vol. 2, p. 275, fig. 19. Referred by Faber, Jour. Cincinnati Soc. Nat. Hist., vol. 9, 1886, p. 15, to a new genus under the name of Lepidoroleus. Newberryi, Whitf
. Annals of the New York Academy of Sciences. Science; Science -- New York (State). North American Palaeozoic Crustacea. 33 Plumulites, Barrande, 1872; Syst. Sil. Boheme, Suppl., vol. 1, p. 5(55. Devonicus. Clarke, 1882; Am. Journ. Sci., 3d series, vol. 24, p. 55, figs. 1, 2. Hamilton. Jamesi, Hall & Whitfield, 1875; Pal. Ohio, vol. 2, p. 106, pi. 4, figs. 1-3. Hudson River. ? Jamesi, Miller, 1875 ; Cincinnati Quart. .Jour. Sei., vol. 2, p. 275, fig. 19. Referred by Faber, Jour. Cincinnati Soc. Nat. Hist., vol. 9, 1886, p. 15, to a new genus under the name of Lepidoroleus. Newberryi, Whitfield, 1881; Annals New York Acad. Sci., vol. 2, p. 217. Huron Shales. Rhachura, Scudder, 1878 ; Proc. Boston Soc. Nat. Hist., vol. 19, p. 296. Probably the same as the genus Dithyrocaris, Scouler, 1843. venosa, Scudder, 1878; Proc. Boston Soc. Nat. Hist., vol. 19, p. 296, pi. 9, figs. 3, 3 a. Coal Measures. Dithyrocaris? venosa, Etheridge, Woodward & Jones, 1889 ; 6th Rept. Comm. Fossil Phyllopoda, p. 4. 57th Rept. Brit. Assoc. Adv. Sci., p. 60. Rhinocaris, Clarke, 1888 ; Pal. New York, vol. 7, p. Iviii. Diagnosis.—" Cephalo-thorax univalvular, laterally appressed ; outline as in Ceratiocaris. Anterior ex- tremity produced into a narrow, vertically flattened prora continuous witli substance of the carapace. The axial line of the carapace bears a low ridge along which it shows no inclination to separate when laterally compressed. Surface smooth or with one or more lateral carinje, and ornamented by finely elevated lines, granules, or tubercles. Abdomen composed of not less than 4 smooth sub- cylindrical somites. Post-abdomen bearing three spines, of which the telson is elongated and conical and the cercopods ; (Pal. New York, vol. 7, p. Iviii.) Columbina, Clarke, 1888 ; Pal. New York, vol. 7, p. 195, pi. 31, figs. 16-21. Hamilton. Columbina, Etheridge, Woodward & Jones, 1888; 6th Rept. Comm. Fossil Phyllopoda Pal. Rocks, p. 8. scaphoptera, Hall &
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