288 



INDEX OF GENERA AND SPECIES. 



Lucina subcircularis, 243. 



tetrica, 100. 

 Lunatia, 77, 114, 222. 259. 



avellana, 222. 



Conradiana, 222. 



Hornii, 222. 



Lewisii, 77. 



nuciformis, 222. 



Oregonensis, 114. 



Pedernalis, 259. 



Shumardiana, 222. 

 Luponia, 78, 163, 225. 



Bayerquei, 163, 225. 



spadicea, 78. 

 Lutraria, 91, 95, 117, 236. 



capax, 91. 



maxima, 91. 



Nuttallii, 91. 



transraontana, 117. 



Traskii, 56, 95. 



truncata, 236. 

 Lutricola, 92. 



alta, 92. 



viridotincta, 92. 

 Lysis, 229. 



duplicosta, 229. 



Mach^ra, 89. 



patula, 89. 

 Macoma, 93, 118. 



arctata, 118. 



ealcarea, 124. 



edulis, 93. 



expansa, 93. 



inconspicua, 94, 124. 



inquinata, 93. 



Macoma nasuta, 93. 

 Ocoyana, 118. 

 Pedroana, 94, 124. 

 yoldiformis, 93. 

 Mactra, 91, 117, 179, 236. 

 albaria, 91. 

 Ashburnerii, 180, 236. 

 Diegoana, 91. 

 falcata, 92. 

 Gabiotensis, 117. 

 Gibbsana, 236. 

 maxima, 91. 

 planulata, 91. 

 tenuissima, 179, 236. 

 Mangelia, 73. 



variegata, 73. 

 Margarita, 85. 



acuticostata, 85. 

 salmonea, 85, 123. 

 Margaritella, 172, 229. 

 angulata, 172, 229. 

 crenulata, 229. 

 globosa, 229. 

 Marginella, 76. 

 Jewettii, 76. 

 Martesia, 175, 233. 

 clausa, 175, 233. 

 Meekia, 248. 

 navis, 248. 

 radiata, 248. 

 sella, 248. 

 Megistostoma, 232. 



striata, 232. 

 Melania, 13, 80. 



Taylori, 13, 80. 

 Meleagrina, 192, 246. 

 antiqua, 192, 246. 



