PART 1 GARTH : PACIFIC OXYRHYNCHA 191 



Length of carapace 



Width at branchial level 



Width at hepatic level 



Length of rostrum 



Width of rostrum 



Length of cheliped 



Length of chela 



Length of dactyl 



Length of ambulatory legs: First 



Second 

 Third 

 Fourth 



From the above measurements it will be seen that, of two specimens 

 of almost identical carapace measurement, the cheliped and walking legs 

 of the male are appreciably longer than those of the female. 



Color in life: Reddish to olive brown mottled with small, round 

 spots of a darker hue. (Holmes) Varies from dark brown to tan, the 

 lighter shades being found in young and apparently recently molted 

 individuals, in which also the dark spots mentioned by Holmes are in- 

 conspicuous or absent. Under parts reddish, often a bright brick red, 

 sometimes with light markings on the coxae of the ambulatory legs and 

 on the external maxillipeds. (Weymouth) Dorsal parts dull brownish 

 green, ventral parts light tan ; sternum, mouth parts, and chelipeds 

 often marked with bright red ; body often mottled with spots of darker 

 color. (Way) Dark brown, greenish brown, or even a bright red on 

 the dorsal surface; ventral side lighter. (MacKay) 



Habitat: Wharf piles, floating kelp, and buoys. (Weymouth) Young 

 very common in tidepools clinging to Fucus and other brown algae ; 

 mature specimens found only in kelp beds. (Baker) Quite plentiful 

 among Enteromorpha, but seems to prefer beds of Zostera. (Mac- 

 Ginitie) Protected outer coast; rocky shores; low-tide horizon, protected 

 rock and seaweed. Occurs frequently on strands of Egregia. (Ricketts 

 and Calvin) Specimens examined had numerous barnacles on carapaces. 

 (MacKay) Infection with Sacculina mentioned by Weymouth (1910) 

 and MacGinitie (1935). 



Depth: Common to 40 fathoms. (Way) This was the maximum 

 depth from which specimens were recovered at Santa Barbara Island 

 by the Velero III. At the great majority of stations, however, collecting 

 was intertidal. 



