174 BULLETIN 97, UNITED STATES NATIONAL MUSEUM. 



the young female the hand approaches in shape that of male. The 

 female may reach maturity while its abdomen is still as narrow as 

 that of male (We} 7 mouth). 



Color. Carapace covered with irregular and interrupted reticu- 

 lating lines of red on a light ground. Spotted with vermilion 

 (W. A. Hilton). 



Measurements. Female holotype, length of carapace 14, width of 

 same 18 mm.; male (23051). length of carapace 9.8, width of same 

 11.8 mm. 



Habitat. Found in siphon of Pholas, the rock-boring mollusk; 

 in mantle cavity of clam, Mytilus edulis; in the large key-hole 

 limpet, Lucapina wenulata; and in the common holothurian r 

 Stichopus calif ornicus. 



Range. Monterey to San Diego, California. 



Material examined. 



Monterey Bay, California: In mantle cavity of Lucapina cre- 

 nulata; Harold Heath; received Nov. 25, 1898; 1 male (22880). In 

 Lucapina crenulata; 4 males, 6 females (2 ovig., 1 of these has a 

 narrow, subtriangular abdomen) (Stanford Univ.). 



Monterey; C. A. Canfield; 1 male, 3 females (1 ovig., 1 is holo- 

 type) (3446). 



Pacific Grove: John C. Brown; 6 males, 1 female y. (23926). In 

 mantle cavity of Mytilus edulis; John C. Brown ; 1 female (23927) . 



Two miles S. by E. of Point del Rey ; Aug. 8, 1913 ; Venice Marine 

 Biological Station; 1 male y. (49301). 



San Pedro; H. N. Lowe; 1 female (49211). 



Anaheim Landing; from siphon of a piddock (P kolas] ; H. N. 

 Lowe; 1 male, 1 female (23051). 



Off Catalina Island; 50 fathoms; H. N. Lowe; 1 male (29950). 



Laguna Beach; W. A. Hilton, Pomona College; 1 male (50104). 



Point Loma; Jan. 28, 1889; steamer Albatross; 1 female ovig. 

 (17481). 



San Diego; Henry Hemphill; received Apr. 15, 1874; 1 female 

 (5743, M. C. Z.). 



Genus PINNAXODES Heller. 



Pinnaxodes HELLER, Reise Novara* vol. 2, Abth. 3, 1865, Crust., p. 67 ; 

 type, P. hirtipes Heller=P. chilensis (Milne Edwards). 



Carapace thin and either soft and yielding or firm and parchment- 

 like. Outer maxillipeds similar in form to those of Pinnixa; merus 

 either fused or partly fused with ischium and nearly longitudinal in 

 position; palpus of good size, terminal segment articulated on inner 

 margin of preceding segment. Chelipeds much stouter than legs. 

 Legs similar and not markedly unequal. 



South America; Japan (Ortmann). 



