78 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 24 



Strongly projecting lobe on anterior margin. Carpus from a little less 

 than two and a half to nearly three times as long as wide, in females 

 and young not exceeding about 2.4 times, margins subparallel ; one or 

 two minute spinules near proximal end of anterior margin sometimes 

 present in young; a low, obliquely rugose crest along posterior margin, 

 ending distally in a tooth, the groove defining this crest filled with 

 short plumose hairs. Manus naked, with a thin outer margin. Fingers 

 long and slender ; gape with a thick pubescence, usually extending nearly 

 to tips of fingers, and in proximal half of their length produced into a 

 long tuft. 



Walking legs smooth to finely granular; merus not inflated, un- 

 armed with spines, all segments covered with scattered tufts of plumose 

 and non-plumose hairs. 



Material examined: See Table 20. 



Measurements: Males, 3.4 to 16.2 mm; non-ovigerous females, 4.2 

 to 12.0 mm; ovigerous females, 5.1 to 11.5 mm. Glassell reported the 

 male holotype to be 15.3 mm in length by 16.0 mm in breadth. 



Color: "Ground color a rich brown, almost a red-chocolate, with 

 large and small blue dots, giving the effect of blue lines, although they 

 are actually a series of blue dots running together, this same effect 

 being on the carpus and fingers of the hand. Median longitudinal ridge 

 of the palm with a row of turquoise-blue spots. Legs a tan spotted with 

 bluish white. Palp of maxillipeds margined with blue, inner proximal 

 base of dactyl orange." (Glassell, 1945, of a live specimen from color 

 note by Kirk.) 



Ecology: "This species occupies the lower levels of the intertidal 

 zone. Its vertical range may be assumed not to exceed the mean low- 

 water level. It, like most members of the genus, demands the shelter of 

 rocks and weeds, uninfluenced by drifting sands." (Glassell, 1945) 



All Hancock Foundation material was shore collected, with minus 

 tides recorded in three cases. Since the zonation of various species from 

 each collecting station was not critically studied, nothing can be added to 

 Glassell's observations, above. 



Ovigerous females are recorded for all months from October through 

 March, and in June. 



Remarks: Glassell (1945) showed that California specimens referred 

 by Schmitt (1921) to Petrolisthes gracilis Stimpson were actually P. 

 manimaculis. The reference by Schmitt in the same paper to P. erio- 



