12 North American Palaeozoic Crustacea. 



Beecheri, Hall & Clarke, 1888 ; Pal. New York, vol. 7, p. 104, pi. 31, fig. 3. 



(Colpocaris) Bradleyi, Meek, 1871 ; Proc. Acad. Nat. Sci. Phila., vol. 23, 

 p. 332. Lower Carboniferous. 



Onckus Deweyi, Hall, 1852; Pal. New York, vol. 2, p. 320, pi. 71, figs. 1 a-d. 



Niagara. 



(^Colpocaris) elytroides, Meek, 1871 ; Proc. Acad. Nat. Sci. Phila., p. 334. 



Lower Carboniferous. 



grandis, Pohluiaii, 1881 ; Bull. Bufi"alo Soc. Nat. Sci., vol. 4, p. 19, fig. 5. 



Waterlime. 



longicaudus, Hall, 1863 ; 16th Rept. New York State Cab. Nat. Hist., 

 p. 73, pi. 1, fig. 7, not figs. 4, 5, 6. Hamilton. 



longicaudus, Packard, 1883 ; 12th Ann. Rept. U. S. Geol. Survey Terri- 

 tories, p. 4.'')0. 



longicaudus, Jones & Woodward, 1884 ; Geol. Mag., Dec. 3, vol. 1, p. 1. 



longicaudus, Etheridge, Woodward & Jones, 1885 ; 3d Rept. Comm. Foss. 

 Phyllopoda, p. 35. 



longicaudus. Hall & Clarke, 1888; Pal. New York, vol. 7, p. 103, pi. 31, 

 fig.l. 



not C. longicaudus, Clarke, Bull. U. S. Geol. Survey, No. 16, 1885, p. 20. 



Maccoyana, Hall, 1859 ; Pal. New York, vol. 3, p. 421*, pi. 84, figs. 1-5. 



Waterlime. 



fpunctatus, Hall; sen Echinocaris punctata. 



? sinuata, Meek & Worthen, 1868 ; Am. Jour. Sci., 2d series, vol. 46, p. 22. 



Coal Measures. 



fsinuata, Meek & Worthen, 1868; Geol. Survey Illinois, vol. 3, p. .540, 

 fig. a. 



simplex, Clarke, 1885; Bull. U. S. Geol. Survey No. 16, p. 43, pi. 2, fig. 2. 



* Devonian. 



? simplex, Hall & Clarke, 1888; Pal. New York, vol. 7, p. 165, pi. 31, 

 fig. 2. 



(Solenocaris) strigata, Meek, 1871 ; Proc. Acad. Nat. Sci. Phila., vol. 23, 

 p. 335. Lower Carboniferous. 



(Solenocaris) strigata. Meek, 1875 ; Pal. Ohio, vol. 2, p. 321, pi. 18, 

 figs. 4 a, b, c. 

 Crangopsis, Salter, 1863; name changed from Pulaocrangon. 

 Cryptozoe, Packard, 1886 ; Proc. Am. Philos. Soc. vol. 23, p. 381. 



Gm. Char. — "The generic characters as drawn from the carapace alone 

 are as follows : Valves ^ as long as broad ; moderately full and con- 

 vex, with no definite straight hinge-margin. It difi"ers from Cerntioairis 

 in the lack of a long straight hinge-margin, the dorsal edge being 

 curved, and in the lower edge not being thickened, while the posterior 

 end is well rounded. The anterior end of the valves is about ^ as wide 

 as the posterior end, and is oblique, the lower part of the edge being 

 directed outwards." 



problematicus, Packard, 1886 ; Proc. Am. Philos. Soc, vol. 23, p. 382, 

 fig. 3, and plate. Carboniferous. 



