1 88 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 (Clymenella). 



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 vn, 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 vii, fig. 6. 



Distribution. From Puget Sound to San Diego, 

 California. From mantle of Mya arenaria Lin- 

 Fio.94- Cryptophrys con- nseus, Cardita borealis Conrad, and Mytilus edulis 



charum. Outer maxilljpeds . 



<X8). Pacific Grove, Calif. LinnSBUS. 



Genus Opisthopus Rathbun. 



OPISTHOPUS TRANSVERSUS Rathbun. 



Plate ix, fig. 2. 



Distribution. From 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 ; 

 while in most specimens it is deep on the ventral surface, g*ath *of 

 in none is it evident on the upper surface. 6) ' 



