188 RATHBUN 
PINNIXA LITTORALIS Holmes. 
Distribution. —Bodega Bay to San Diego, California. 
PINNIXA LONGIPES (Lockington). 
Distribution.—Tomales Bay to San Pedro, California. In tube of 
annelid (C/ymenella). 
PINNIXA FABA (Dana). 
Distribution.—From Sitka, Alaska, to San Pedro, California. In shells 
of large bivalve mollusks, and in the cloaca of a large holothurian, 
Liosoma arenata Stimpson. 
Genus Scleroplax Rathbun. 
SCLEROPLAX GRANULATA Rathbun. 
Plate vit, fig. 5. 
Distribution.—From Bodega Bay, California, to Ensenada, Lower 
California. 
Genus Parapinnixa Holmes. 
PARAPINNIXA AFFINIS Holmes, 
Distribution. — Deadman Island, San Pedro, California. 
Genus Cryptophrys Rathbun. 
CRYPTOPHRYS CONCHARUM Rathbun. 
Plate vu, fig. 6. 
aus Distribution.—From Puget Sound to San Diego, 
California. From mantle of Mya arenaria Lin- 
Fic. 94. Cryptophryscon- neeus, Cardita borealis Conrad, and Mytilus edulis 
charum. Outer maxillipeds 
(Xx 8). Pacific Grove, Calif. Linnezus. 
Genus Opisthopus Rathbun. 
OPISTHOPUS TRANSVERSUS Rathbun. 
Plate 1x; fig. 2. 
Distribution.— From Monterey to San Diego, California. | 
In Lucapina crenulata Sowerby, siphon of Pholas, and (\ 
mantle cavity of Afptilus edulis. The suture dividing the /” 
ischium from the merus of the maxillipeds is obsolescent ; rope ae aa 
while in most specimens it is deep on the ventral surface, {Sin *3¢ pe 
in none is it evident on the upper surface. Packers 
