236 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 18 



Gnathopods 1-2, article 5 shorter than 6, article 6 rather slender, 

 palm oblique. Ratio of lengths of articles 5-6: Gnathopod 1 = 31 :36; 

 Gnathopod 2 <= 26 :36. 



Peraeopod 3 slender, article 6 longer than 5. Ratio of widths of 

 articles 2,4,5, 6 = 17:10:9:5. 



Peraeopod 4 slender, article 2 prolonged conically at distal posterior 

 corner. Ratio of widths of articles 2,4,5, 6 = 31:11 :8:5. 



Peraeopod 5 : article 2 moderately slender, its ratio of width to 

 length being 4 :5 ; article 2 extends down to the middle of article 4, 

 strongly convex on lower edge, sweep point at lower end of article 3 ; 

 posterior edge with about 9 minute teeth. 



Uropod 1 : upper edge of peduncle with slender, long setae, outer 

 ramus with 2, inner ramus with one stout spine. 



Uropod 2: upper edge of peduncle with crowded, long stiff setae, 

 outer ramus bare, inner with 3 stout spines. 



Uropod 3 : inner ramus about one half as long as outer ramus, article 

 2 of outer ramus very slender and about one sixth as long as article 1 ; 

 otherwise the entire appendage is stout. 



Telson: broad, apices blunt, each armed with 3 long spines. 



Third epimeron : posterior edge slightly concave, lower corner armed 

 with a large, blunt tooth, the upper edge of which continues as a setose 

 flange onto the lateral surface of the epimeral plate. 



Male. — Sexual dimorphism typical. Article 2 of the outer ramus of 

 uropod 3 is about one twelfth as long as article 1. 



Remarks. — The writer has not examined the holotype of this species 

 but believes he has identified it correctly from Holmes' description and 

 figures. Only a minor addition is needed to the original work on this 

 species, which is the setose flange on the lateral face of the third epimeron. 



Paraphoxus ochoticus (Gurjanova 1953: 225) may be a subspecies 

 of P. robustus. See P. ochoticus for a discussion. 



Material examined. — 252 specimens from 62 stations. 



Distribution. — Puget Sound to southern California. Southern Cali- 

 fornia coastal shelf and slopes, 30 to 115 fms, mainly concentrated in 

 30 to 60 fms and associated with the brittle star Amphiodia urtica. 



PLATE 25 

 Paraphoxus robustus Holmes, female, 10 mm, Sta. 1390-41. 



Figs. A,B, head; C, mandible; D, mandible; E, lower lip; F,G, maxillae 



1, 2; H, maxillipedal palp article 4; IJ, antennae 1, 2; K, 

 gnathopod 2; L,M,N,0, peraeopods 2, 3, 4, 5; P,Q,R, uropods 1, 



2, 3 ; S, telson; T, pleon segment 3; Z,Z' gnathopods 2, 1. 



Male, 6.5 mm, Sta. 1390-41. Figs. U, head; V, antenna 2; W, uropod 3; X,Y, 

 gnathopods 1, 2. 



