39 



1955 Pyramidula Cockerelli 



2018 Pyramidula elrodi 



1917 Pyramidula perspectiva 

 1669 Pyramidula Randolphii 



1918 Pyramidula striatella 



1919 Variety Cronkhitei 

 1889 Pyramidula strigosa 



1890-1916 Varieties or forms Binneyi, cooperi, multicostata, 

 castanea, albofasciata, buttoni, gouldii, parma, jugalis, inter- 

 sum, subcarinata, bicolor, lactea, picta, globulosa, trifasciata, 

 contluens, elevata, major, minor, Iowensis (extinct), concen- 

 trata, Haydeni, Hemphilli, Gabbiana, Bruneri (oquirrbensis) 

 and hybrida, have been described by Cockerell, Hemphill and 

 others. See 1479 to 1485. 



2046 Pyramidula strigosa concentrata 



1886 Pyramidula solitaria 



1887 Variety occidentalis v. Martens. 



1888 Variety limitaris Dawson. 



1967 Pyrgulopsis Nevadensis Stearns. 



1160 Pythina rugifera Carpenter. 

 63 Ranella californica 



2106 Banella cruentata Sby. 



2703 Rangia Lie Contei Conr. 



3161 Rhodea Californica Pfeiffer, 1846. 



3162 Variety Ramentosa Cp. 1891. 

 1190 Rictaxis punctocoelata 



1263 Rimula cucullata Gld. Is Puncturella c. 



1264 Rimula galatea Gld. Is Puncturella g. 



1044 Rissoa sequisculpta Carpenter. 



1045 Rissoa castanea Moller. 



1046 Rissoa compacta Carpenter. 

 396 Rissoa acutilirata Carpenter. 

 2716 Rissoa purpurea 



1047 Rissoa? cooperi Tryon. 

 2044 Rissoa Kelseyi 



1048 Rissoa? exilis Tryon. 



1049 Rissoa fllosa Carpenter. 

 2575 Rissoa (Alvania) Grippiana 

 1051 Rissoa purpurea Dall. 



1$52 R. (Alvania) reticulata Carpenter. 



2037 Rissoina Bakeri 



205 Rissoina interfossa Cpr 



395 Rissoina purpurea Carpenter. 



3080 Rochefortia compressa. Gulf of Cal. 



2250 Rochefortia grippi Dall. 



2495 Rostanga pulchra 



484 Rupellaria lamellifera See 2186. 



2908 Sanguinolaria tellinoides A. Ad. 



2909 Sanguinolaria Hanleyi Bertin. 



2910 Sanguinolaria Nuttallii Conrad. 

 107 Sanguinolaria nuttallii 



280 Saxicava rugosa Linn 



302 Saxidomus aratus Gld. 



1053 Saxidomus brevisiphonatus Carpenter. 



2162 Saxidomus giganteus 



376 Saxidomus gracilis Gould 



301 Saxidomus nuttallii Conr 



1568 Saxicava arctica L. 



356 Saxicava pholadis Linnaeus 



1169 Saxidomus squalid us Deshayes. 



