﻿50 LAMPSII.IS 



Unio ochraccus Say, Nich. Hncyc, 1817, pi. 11, fig. 8. — Conrad, 

 Monog., IV, 1836, p. 37, pi. XVIII, fig-. 2. — Gould, Inv. Mass., 

 184T, p. 112, fig. 74; 1870, p. 173, fig. 476 — Hanley, Biv. 

 Shells, 1843, P- 190. pl- XX, fig. 48? — De Kay, Zool., of N. 

 Y., Pt. 5, 1843, P- 193. P^- I'Xix. figs. 237, 238. — KUSTER, 

 Conch. Cah. Unio, 1856, p. 163, pi. xlvii, fig. i. — Sowerby, 

 Conch. Icon., XVI, 1868, pi. lxiii, fig. 317. — Hartman and 

 MiCHENER, Conch. Cest., 1874, p. 39, fig. 184. — Simpson, 

 Nautilus, YITI, 1895, P- 122, fig. 



Mar gar oil (Unio) ochraccus Lea, Syn., 1852, p. 27 ; 1870, p. 42. 



Lampsilis ochraccus Simpson, Syn., 1900, p. 530. 



Mya ochracea Eaton, Zool. Text-Book, 1826. p. 218. 



Syuiphyiiofa ochracea Lea, Tr. Am. Phil. Soc, III, 1830, p. 

 455; Obs. I, 1834, p. 69. 



Margarita (Unio) ockrocea Lka, Syn., 1836, p. zt,; 1838, p. 18. 



Lampsilis ochracea Stimpson, Shells of N. Eng., 1851, p. 14. 



Unio crocatus Lea, Pr. Am. Phil. Soc, II. 1841, p. 31 ; Tr. Am. 

 Phil. Soc. VIII, 1842, p. 238, pi. XXII. fig. 52; Obs., Ill, 

 1842, p. 76, pi. XXII, fig. 52. — CiiENU, 111. Conch., 1858, pi. 

 XXXIII, figs. I, la, lb. 



Margaron (Unio) crocatus Lea, Syn., 1852, p. 2^ : 1870, p. 42. 



Unio rosacciis Conrad, Pr. Acad. N. Sci., Phila., IV, 1849, P- 

 153; Jl. Acad. N. Sci. Phila.. I. 1850. p. 275, pi. xxxvii, 

 fi?:. 5- 



Unio troostcnsis Sowerp.y, Conch. Icon.. XYl, 1866, pi. 

 xxxvm, fig. 210. 



Unio affinis Sowerby? Conch. Icon.. X\'I. 1868, pi. lxiii. 

 fig. 318. 

 A species which does not seem to be very closely allied to 



any member of the group unless it may be /,. dclinubis. Its 



thinness, the rather sharp posterior ridge, the general smoky 



tint of the epidermis and the peculiar reddish or violaceous 



nacre arc its principal characters. 



Lampsii.is splendid a (Lea). 



Shell somewhat elongated, subsolid, greatly inflated, with 

 very full, high beaks and a strong, rather sharp posterior ridge, 



