6 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 5 



Ambulatory legs rather long, lightly crested with tomentum in 

 tufts; the propodi nearly one and one-half times as long as the carpus; 

 carpus subequal in length to dactyli; dactyli long with slightly curved 

 corneous tips, and armed on the under side with a row of supplemental 

 corneous spines. 



The outer maxillipeds have their ischium transversely striate. 



Color in alcohol: Carapace with orange- red blotches on a cream- 

 colored ground. Propodi of ambulatories banded. Ventral surface 

 slightly iridescent. 



Range: West coast of Mexico, at depths from 20 to 50 fathoms. 



Remarks: This proposed species is allied to P. sigsbeiana A. M. 

 Edwards, 1880, and is undoubtedly the Pacific analogue of Milne 

 Edwards' species; it differs in having two small verticils on the cara- 

 pace, instead of being smooth; by having the ventral inner surface of 

 the carpus of the chelipeds subsimilar to that of the dorsal surface, 

 both bearing spines, instead of the dorsal alone; and by the carapace 

 not being marked with longitudinal stripes. The bathymetric range in 

 both species is the same. 



This proposed species is dedicated to Captain Allan Hancock, 

 patron of science, whose interest in the marine fauna of the Pacific 

 coast has been responsible for the extension of our horizons. 



