322 CALIFORNIA ACADEMY OF SCIENCES. [Proc. 3D Ser. 



about half the length of the body; first joint of the peduncle with a sub- 

 quadrate external lobe; fourth joint about | the length of the fifth; flagellum 

 considerably longer than the peduncle. 



Mandibles with a large, elongated molar tubercle; palp three-jointed, the 

 second joint longer than the first, widest near the middle and setose on the 

 distal half of one side; third joint shorter than the second, arcuate and 

 tapering to a point furnished with a few long setae, the concave side thickly 

 setose. Inner plate of the first maxillee with 5 ciliated setae at the distal end ; 

 outer plate with about 12 curved, denticulated teeth. Second maxillae 

 oblong, the inner plate with the distal margin ciliated and very oblique; 

 outer plates reaching to the distal margin of the inner, their transverse distal 

 margins furnished with long setae. Maxillipeds with 7 or 8 blunt hooks on 

 the inner margin of the inner plate. 



First pereiopods with the first joint broad, the posterior margin more 

 convex than the anterior; second joint longer than wide, third joint with an 

 anterior pointed lobe, fourth joint very small and triangular; hand oblong, 

 both margins about equally convex, the lower armed with stout spines; 

 dactyl large, closing against nearly the whole length of the palm, the inner 

 margin furnished with obliquely set spines which become larger toward the 

 tip. Second pereiopods longer than the first, the first joint convex on both 

 margins and twice as long as wide; second joint about as long as the fourth 

 and strongly convex in front; third joint subtriangular, produced downward 

 at the antero-distal angle; fourth joint armed below with 9 spines; fifth joint 

 shorter than the fourth and armed below with 4 strong spines and a smaller 

 fifth spine near the proximal end, the distal end produced into a pointed 

 lobe beside the dactyl; dactyl armed below with 4 spines which increase in 

 size toward the slender tip. Third and fourth pereiopods similar to the 

 second. The last 3 pairs of pereiopods are longer and relatively more slender 

 than the first pair and have the fifth joint as long as the fourth. 



First pair of pleopods very small and oblong; second pair not fused in 

 the middle, and forming an operculum over the succeeding ones. Caudal 

 stylets but slightly longer than the abdomen, the peduncle oblong, flattened, 

 armed with 5 spines on the inner and 4 on the outer margin; inner angle 

 produced; outer ramus slender, spinulous, longer than the peduncle and 

 setose at the tip. 



The body is covered with short setae which become longer on the 

 margins. 



Length /„ inch. 



This description is taken from the single type specimen 

 of Mr. Harford (No. 2609, collection of the California 

 Academy of Sciences). One of the caudal stylets was 

 missing and in the other the inner ramus is much shorter 

 than the outer. This is doubtless due to its having been 

 lost and only partially regenerated. Its stump-like appear- 

 ance would suggest this explanation; besides in several 

 other specimens that I refer to this species the inner ramus 

 is the longer of the two. 



