450 



GEOLOGICAL SURVEY OF THE TEERITORIES. 



Genus Ceratiocaris McCoy, 1850. 



Lcjptocheles McCoy, 1850. 



Carapace bivalved, united by a liinge-like suture, the valves ovate, 

 semiovate, or subquadrate, with a long, narrow rostrum. Head (or 

 thorax?) with jointed appendag'es. Body many (fourteen or more) 

 jointed, of which 5 or G segments extend beyond 

 the carapace ; the last one longest, and support- 

 ing a strong, bulbous telson and two shorter 

 appendages. Surface generally lineate, often 

 finely so. 



C. x)apUlo Salter, Siluria, 262, figs. 1, 2, yoI. 5. Great 



Britaiu. 

 C. styrjius Salter, Ann. Mag. Nat. Hist. 1860; Quart. Am. 



1860j 156. Great Britaiu. 

 C. inornatus McCoy, 1. c. 156. Great Britain. 

 C. murchisoni McCoy, 1. c. 157. Great Britain. 

 C. leptodaciylus McCoy, 1. c. 157. Great Britain. 

 C. rohustiis Salter, 1. c. 157. Great Britain. 

 C. decorus Phillips, Mem. Geol. Sury. ii, PI. 30, fig, 5. 



Great Britain. 

 C. ? ensis Salter, 1. c. 159. Great Britain. 

 C. vesica Salter, 1. c. 159. Great Britain. 

 C. cassia Salter, 1. c. 159. Great Britain 

 C. aptychoides Salter, Quart. Geol. Journ. viii, PI. 21, fig. 



10. Groat Britain. 

 C. Judeiisis Woodw., Geol. Mag. viii, 3, 1871. (Over two 



feet in lengfli.) 

 C. oreionensis Woodw., 1 c. 

 C truneatus Woodw., 1. c. 

 CJ hrcvicauda Salter; Bigsby, J. J. Thesaurus iilur. 73, 



1868. 

 a ? (/if/OS Salter; Bigsby, .J. J. Thesaurus silu:-. 73, 1868. 

 C? leyiimen Salter; Bigsby. J. J. Thesaurus silur. 73, 



1868. 

 C. ? perorvatus Salter; Bigsbv, J. J. Thesaurus silur, 73, 



1868. 

 C. hohemictts Barrande, Svst. Sil. 447, PI. 19. Bohemia. 

 C. debilis Barr., 1. c. Pis. 18, 19, 26, 31. Bchemia. 

 C. decipiens Barr.,1. c. PI. 21. Bohemia. 

 C. doceiis Barr., 1. c. PI. 21. Bohemia. 

 Fig. 70.-Echinocansp7mctatu>!; (j^ hueqitaUs Barr., 1. c. PI. 19, var. decurtata. Bohemia. 

 aunoTDPn, dorsal view, uatuial size, y-, ■ , -r, i -mioni 



From Hall. V. prmmlus iiavx., I. c. PL 18. Bohemia. 



C. ncharyi Barr., 1. c. PI. 32. Bohemia. 

 C. iardns Barr., 1. c. PI. 18. Bohemia. 



C. lorigicaiidus Hall, 16th Rep. State Cab. N. York, PI. 1, figs. 4-7, 1863. Genesee. 

 C. (Onchus) dewii Hall,' Pal. N. York, ii, 320, PL 71, 1852. New York. 

 C. maccoyanus Hall, Pal. N. York, iii, 420, 1859. New York State, Devonian. New 



York. 

 C. acuminatus Hall, 1. c. 1859. New York, 

 C. aculeaius Hall, 1. c. 1859. New York. 



Genus Echinocaris Whitfield, 1880. 



Carapace bivalve, valves subovate. Abdomen composed of several 

 segments, each bearing spines on the posterior margin. Type, JE. sm&- 

 Zev is Whitfield. 



E. stMeris Whitfield, Amer. Joum. Sc. 36, 1880. 



E. punctatus (Hall), 16th Rep. State Cab. N. Y. 74, PI. 8, fig. 1. 



'The following species are of doubtful position (see, also, Whitfield, 1. c): 

 Ceratiocaris (Colpocaris) Iradleyi Meek, Ohio Geol. Surv. Palaeontology, PL 18, figs. 



Ha-e, 318, 1875. 

 Ceratiocaris ( Colpocaris) elytroides Meek, 1. c. PL 18, figs. 5fl, h, c, 319. 

 Ceratiocaris {Solenocaris) striata Meek, 1. c. PL 18, figs. 4a, h, c, 321. 



