192 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 21 



Size and sex : Although the series examined is not as rich in specimens 

 under 8 mm as that of Taliepus nut t alii, it is possible to piece together a 

 similar account of post-larval development. The smallest specimens, 

 slightly over 3 mm in length, are constricted about the middle of the 

 carapace, suggesting the young of Pugettia richi. 5 mm specimens have 

 attained the characteristic straight-sided appearance of the adults, but are 

 proportionately more slender. By 8 mm sex can be determined with 

 certainty, although the first pleopod of the male is but little longer 

 than the second and extends only half way to the tip of the abdomen. 

 Specimens from 8 to 15 mm possess two gastric tufts of hair which 

 persist in some individuals, especially females, to 35 mm or over. Young 

 of this age also have the margins of the carapace fringed with soft pile, 

 with clusters of clavate hairs at the tips of the rostral, orbital, and 

 lateral marginal spines, which are acutely spinulous. A few clavate hairs 

 at the upper distal extremities of the meral and propodal segments of 

 the walking legs are usually present. As in the young of Taliepus nut- 

 talli, the concave inner margins of the rostral horns are fringed with 

 slender, club-tipped hairs which crisscross in a fine network. Unlike that 

 species, the velvet stage seems to be not so much a matter of age as 

 environment, only those specimens taken from Anaheim Slough and in- 

 side the breakwater at Corona del Mar, California, showing the downy 

 carapace covered with sediment. Older specimens appear to lose the 

 tufts and marginal hairs, the acute spinules of the marginal prominences 

 wearing down to blunt teeth. The hooked hairs on the rostrum are 

 retained and serve for the attachment of bits of algae which afford 

 concealment. 



While the average size of the ovigerous females is about 48 mm, 

 specimens bearing eggs range from 26 to 69 mm. Males taken with the 

 48 mm females, of like size and presumably sexually mature, lack the 

 tremendously large chelipeds with their widely gaping fingers attributed 

 to the very old in this species (cf. Rathbun, 1925, p. 169). Specimens 

 from Oregon are noticeably larger than those from southern California. 



Breeding: Gravid females were found commonly at Coos Bay, 

 Oregon, in June and July, in Sonoma County, northern California, from 

 October to February, and at Dillon Beach, Marin County, in August 

 and November. In southern California, where winter collecting has been 

 the rule, females with ova have been taken from November to February, 

 and in Lower California in January, March, and June. 



Remarks: The range of the species has been extended southward from 

 Santa Rosalia Bay to Asuncion Point, Lower California, including the 



