52 
MARINE SHELLS OF WEST COAST OF NORTH AMERICA 
Type. Pleurobranchus peronii Cuvier. 
Distribution. South America, Norway, Britain, Mediterranean, Red 
Sea, Ceylon, west coast North America. 
Pleurobranchus californicus Dali, 1900 
Nautilus, 14:92. 
Shell rather long and narrow, subrectangular, longitudinally obsoletely 
striate on the left side, obscurely obsoletely punctate near the anterior 
edge, and covered with a very thin periostracum, which reflects nacreous 
tints of color. The shell itself is white and thin, with a small spiral 
nucleus; the left margin somewhat recurved, the central part moderately 
convex; the whole extends more than half the length of the body and 
measures 12 by 6.5 mm. (Dali.) 
Type in Oldroyd Collection, Stanford University, No. 307. Type 
locality, San Pedro, California. 
Range. San Pedro to San Diego, California. 
Pleurobranchus digueti Rochebrune, 1895 
Bulletin, Museum of Natural History, Paris, 240. Manual of Conchology, 16; PI. 54, 
figs. 98, 99, 1, 2. 
Corpus rotundato ovatum, turgidum; pallio ovato, antice subtruncato, 
marginibus undatis, latis; pede subangusto, circulariter crenulato; regione 
buccali proboscidea; tentaculis duobus, rotundatis canaliculatis; branchiis 
subabsconditis; superne miniacum; inferne albo luteum. (Rochebrune.) 
Body rounded, ovate, swollen; mantle ovate, subtruncate in front, the 
margins waved, wide; foot rather narrow, circularly crenulated; buccal 
region proboscis-like; tentacles 2, round and channeled; gills somewhat 
concealed; scarlet above, buff-white below. Length, 22; width, 16; alt., 
12 mm. (Tryon and Pilsbry, Manual of Conchology.) 
Type in Museum, Paris. Type locality, Mogote, baie de la Paz. 
Range. San Pedro, California, to Gulf of California. 
Family ELLOBIIDAE 
Genus PHYTIA Gray, 1821 
Shell oblong-oval, thin, spire acuminate ; last whorl large, rounded at 
base; columella with an oblique plait; aperture contracted by teeth, and 
sometimes by a callosity of the outer lip. (Tryon and Pilsbry, Manual of 
Conchology.) 
Type. Alexia denticulata Mont. 
Distribution. United States, West Indies, Madeira, Europe. 
