NO, 5 BARNARD: AMPHIPODA 67 



or quadrate posteriorly ; pleonite 4 rounded dorsally ; telson medium in 

 length, cleft more than halfway, apices tapering, each armed with a 

 spine ; eyes absent ; articles 5 and 6 of gnathopod 1 equal in length, 

 palm oblique, distinct from posterior margin of article 6; mandibular 

 palp article 3 about three fourths as long as article 2 ; article 2 of 

 pereopod 5 not constricted distally ; coxae lacking conspicuous teeth ; 

 article 1 of antenna 1 not produced distally, article 1 of flagellum elon- 

 gated ; outer ramus of uropod 3 apparently biarticulate ; lateral ce- 

 phalic lobes short ; gnathopod 2 short, stout. 



Holotype: AHF No. 581 1, male, 4 mm. Unique. 



Type locality: Station 5829, off Ventura, California, 34°-10'-55" 

 N, 119°-25'-45"W, 88 m, August 21, 1958. 



Relationship: This species most closely resembles Hippomedon 

 geelongi Stebbing (1888: pi. 11) but differs in the shorter cephalic lobes 

 and stouter second gnathopod. It differs from H. miniisculus (Gur- 

 janova, see 1962) in the elongated basal flagellar article of antenna 1. 

 It is remarkably similar to H. propinquus eous Gurjanova (1962) but 

 that subspecies has a shorter sixth article of gnathopod 1 and bears dis- 

 tinct eyes. 



Hippomedon granulosus Bulycheva (1955, see Gurjanova 1962) 

 differs from this species in the shorter sixth article of gnathopod 1 but 

 otherwise there is close correspondence. Hippomedon strages J. L. 

 Barnard (1964a) differs from H. tenax in the same way as H. granu- 

 losus; in addition the palm of gnathopod 1 is longer than the posterior 

 margin of article 6. 



This specimen bears resemblance to Tryphosa coeca Holmes (1908) 

 from Monterey Bay. Unlike the figures of T. coeca it has a much 

 stouter second gnathopod, slightly longer first gnathopod and larger 

 tooth of the third pleonal epimeron. Holmes did not figure the head, 

 coxa 4, and other characters of his species. 



Hirondellea fidenter, new species 



(Figs. 15, 16) 



Diagnosis: Eyes not apparent; article 7 of gnathopod 1 greatly 

 overlapping palm ; third pleonal epimeron broadly convex posteriorly, 

 ventral corner rounded ; fourth pleonite not strongly produced dor- 

 sally; inner ramus of uropod 2 strongly constricted; telson long, deeply 

 cleft. 



Holotype: AHF No. 5919, male, 4.7 mm. Unique. 



Type locality: Station 6336, San Nicolas Basin, California, 

 33°-09'-00"N, 118°52'-10"W, 1227 m, August 14, 1959. 



Relationship: Of the six species described since the erection of the 



