196 BULLETIN OF THE 
Section Eucrroa Dall. 
Verticordia (Euciroa) elegantissima Dall. 
Subgenus PECCHIOLIA Meneghini. 
Pecchiolia argentea Mariti.* 
Subgenus HALIRIS Dall. 
Haliris Fischeriana Dall. 
MYTILIMERIA Conrad. 
Mytilimeria Nuttallii Conrad.* 
LYONSIELLA Sars. 
Lyonsiella insculpta Jeffreys.* 
Famity CUSPIDARIIDZ. 
CUSPIDARIA Nardo. 
Subgenus CUSPIDARIA s.s. 
Cuspidaria rostrata Spengler. 
Cuspidaria rostrata (? var.) microzhina Dall. 
Cuspidaria Jeffreysi Dall. 
Cuspidaria obesa Loven. 
Cuspidaria? arcuata Dall 
Subgenus CARDIOMYA A. Adams. 
Cardiomya californica Dall.* 
Cardiomya perrostrata Dall. 
Cardiomya costellata Deshayes. 
Cardiomya costellata, var. curta Jeffreys. 
Cardiomya costellata, var. corpulenta Dall. 
Cardiomya striata Jeffreys. 
Subgenus LEIOMYA A. Adams. 
Leiomya adunca Gould.* 
Section Vutcanomya Dat. 
(?Leiomya) Vulcanomya Smithii Dall.* 
Section Precropon Carpenter. 
Leiomya (Plectodon) scaber Carpenter.* 
Leiomya (Plectodon) granulata Dall. 
Leiomya (Plectodon) granulata, var. velvetina Dall. 
