l88 RATHBUN 



PINNIXA LITTORALIS Holmes. 

 Distribution.— 'Bod^tga. Bay to San Diego, California. 



PINNIXA LONGIPES (Lockington). 

 Distribution.— Tomales Bay to San Pedro, California. In tube of 

 annelid {Clymenella). 



PINNIXA FABA (Dana). 



Distribution.— Yxom 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 VII, fig. 5. 

 Distribution.— Yxom Bodega Bay, CaUfornia, to Ensenada, Lower 



California. 



Genus Parapinnixa Holmes. 



PARAPINNIXA AFFINIS Holmes. 



Distribution.— DesidmsLn Island, San Pedro, Cahfornia. 



Genus Cryptophrys Rathbun. 



CRYPTOPHRYS CONCHARUM Rathbun. 



Plate VII, fig. 6. 



Distribution.— From Puget Sound to San Diego, 

 California. From mantle of Mja arenaria Lin- 

 F1G.94. Cryptophrys con. nscus, Cardita borealis Conrad, and Mytilus edulis 



charum. Outer maxillipeds , 



(X8). Pacific Grove, Calif. LinnseUS. 



Genus Opisthopus Rathbun. 



OPISTHOPUS TRANSVERSUS Rathbun. 



Plate IX, fig. 2. 



Distribution. — Yrom Monterey to San Diego, California. 

 In Lucapina crenulata Sowerby, siphon of Pholas, and 

 mantle cavity of Mytilus edulis. The suture dividing the 

 ischium from the merus of the maxillipeds is obsolescent ; thop^ '^IransvlU 

 while in most specimens it is deep on the ventral surface, gnath of outer 



. ., . , ^ ^1 r maxilliped (X 61). 



m none is it evident on the upper surface. pacific. Grove. 



