WRITINGS OF C. D. WALCOTT. 197 



Modiola, Lamarck 



M. 1 nevadensis, n. s., Walcott, 1884, pi. xix, flg. 8. 

 Modiomorpha, Hall 



Page. 

 239 

 239 

 239 



M. ambigua, n. s., Walcott, 1884, pi. xx, tig. 1 239-240 



M.f desiderata, n. s., Walcott, 1884, pi. xx, fig. 3 240 



M.? pintoensis, u. s., Walcott, 1884, pi. xx, flg. 2 240-241 



Nucula, Lamarck 241 



N. instUaris, n. a., Walcott, 1884, pi. xx, flg. 14 " 240 



N. levatiforme. n. s., Walcott, 1884, pi. xxii, flgs.l, la 241-242 



Solenomya, Lamarck 240 



aS. curta, n. 8., Walcott, 1884, pi. xxii, figs. 6, 11 ["."."..[[[ 242 



Macrodon, Lycett ' 245 



M. hamiltonce, HaU, 1870, pl.xxiii, figs. 5, 5 a-c '" 243 



M. truncatus, n. s., Walcott, 1884, pi. viii, flg. 2 243-244 



Qramniysia, De Verneuil 244 



G. hannibalensis, Sbumaid, sp., 1855, pi. xx, flg. 4 244 



G. arcuala, Conrad, sp., 1841, pi. xx, flg. 5 245 



Udmondia, De Koninck 245 



E. niedon, u. s., Walcott, 1884, pi. xxiii, fig. 6 245 



£. ? circularis, n. s., Walcott, 1884, pi. xxii, flg. 9 246 



Pleurophorus, 'Kiag 246 



P. meeki, n. s., Walcott, 1884, pi. viii, fig. 3 246 



Sanguinolites, McCoy 247 



S. oeolus, H. & W., 1870, pi. xx, figs. 6, 7, 9 247 



S. retusus, n. s., "Walcott, 1884, pi. xx, flg. 10 , 247-248 



S. simplex, n. s., Walcott, 1884, pi. xx, fig. 11 248 



S. salteri, u. s., Walcott, 1884, pi. xx, flg. 12 248-249 



S. i noenia, n. .s., Walcott, 1884, pi. xix, fig. 9 249 



S. striatus, n. s., Walcott, 1884, pi. xxiii, fig. 7 249-250 



Microdon, Conrad 250 



Subgenus Cypricardella, Hall 250 



M. (Cypricardella) connafwg, n. s., Walcott, 1884, pi. xxiv, figs. 5, 5 a 250-251 



Gardiola, Brodeiip 251 



G. 1 filicostata, n. s., Walcott, 1884, pi. xxii, figs. 4, 4 a : 251 



Hchizoduf!, King 252 



S. cuneatus, Meek, 1875, pi. xx, flg. 8 252 



-S'. deparcMS, n. s., Walcott, 1884, pi. xxii, fig. 5 252 



S. curti/orme, U.S., Walcott, 1884, pi. xxii, figs 3, 3 a 253 



S.pinioeMsw, U.S., Walcott, 1884, pi. xxii, figs. 2, 2 a 253-254 



Gasteropoda. 



Platyceras, Conrad 254 



P. occidens, n. s. , Walcott, 1884, pi. xxiv, figs. 9, 9 a 254 



P.pi«o, n. s., Walcott, 1884, pi. xxiv, figs. 7, 7 a,b 254-255 



Platyosioma, Conrad 255 



P. inornatum, n. a., Walcott, 1884, pi. xxiv, figs. 3, 3 a 255 



Euomphalus, Sowerby 255 



E. (StraparoUiis) subrugosus, M. &, W., 1873, pi. xviii, flg. 19 255-256 



Bellerophon, Montfort 256 



B. majusculus, n. s., Walcott, 1884, pi. xxiii, figs. 1, 1 a; pi. xxiv, fig. 6, and fig. 3, p. 257. 250-257 



J?. Uxtilin, Hall, ? 1877, pi. xviii, fig. 18 257-258 



Loxonema, Pbillips 258 



L. bella, n. a.. Walcott, 1884, pi. xxiv, figs. 1,1a 258-259 



Pleurotomaria, Defrance 259 



P. nodomarginata, McChesney, 1860, pi. xviii, fig. 15 259 



P. nevadensis, n. s., Walcott, 1884, pi. xxiv, figs. 2, 2 a 259-260 



Macrocheilus, Pbillips 260 



Macrocheilus, ,ap.,? Walcott, 1884, pi. xxiv, fig. 8 260 



Metoptoma, Pbillips 260 



M. peroccidens, n. s., Walcott, 1844, pi. xviii, flg. 16 260 



Ampullaria, Lamarck 261 



AApowelli, Walcott, 1883, figs. 4, 5, p. 261 261 



Pulmonifera. 



Physa, Drapamaud 262 



P. prisca, Walcott, 1883, flg. 6, p. 262 262 



Zaptychius, 'Wa^oott^ 1883 263 



Z. car6o«ana, Walcott, 1883, flg. 7, p. 263 263 



