136 U.S. NATIONAL MUSEUM BULLETIN 258 



dactyl fitting palm, article 2 slightly expanded rectangularly at distal 

 end; dactyls of all pereopods each bearing one large marginal seta 

 faintly striate at base, portions of dactyls striate and with extremely 

 minute castellations proximal to large seta, apices of dactyls with 

 nail armed with minute seta, posterior edges of sixth articles of 

 pereopods 1-2 with proximal setular armature, one subdistal group of 

 setae and one spine, and one small distal spine, none of these spines 

 conspicuously striate or enlarged; pereopods 3-5 with proximal, pos- 

 terior spinal groups in addition to those described for pereopods 1-2 ; 

 posterior edges of second articles of pereopods 3-5 slightly serrate, 

 posterior edge of pereopod 4 lacking "fur", posterodistal edge on 

 pereopod 5 perfectly rounded; posterior spines of fourth articles of 

 pereopods 3-5 not intermingled with setae; first pleonal epimeron 

 rounded behind, with bluntly quadrate posteroventral corner, second 

 epimeron with sinuate posterior edge and bluntly projecting ventral 

 tooth, third epimeron also sinuate but ventral tooth obsolescent; 

 uropod 1 lacking interramal spine, outer ramus with 2-3 marginal 

 spines and several apical spines, uropod 2 with 1-2 marginal spines on 

 outer ramus, uropod 3 with ramus (not including apical spines) 

 slightly shorter than peduncle, ramus with one subdistal, lateral 

 spine; mouthparts otherwise as described by Hurley (1957). Female 

 gnathopods as figured. 



Holotype. — AHF No. 6110, male, 6.3 mm. 



Type locality. — Barnard station 42-E-2, Hazard Canyon reef, 

 flat platform 0.66 m. above surge channel, December 8-9, 1961. 



Relationship. — The types of Hyale grandicornis (Kr0yer) from 

 Valparaiso, Chile, were examined and redescribed by Stephensen 

 (1949). Without the work of Hurley (1957) and reference to Iwasa 

 (1939) the present material would have been described as a new 

 species, rather than as a subspecies of H. grandicornis. The types are 

 very distinct in their possession of a furry posterior edge on article 2 

 of pereopod 4, the nearly straight posterior edges of the second and 

 third pleonal epimera, the weakly pointed posterior cusps of the first 

 four coxae, the short fifth article of pereopod 4, the elongated hand 

 of the first gnathopod having its posterior setae widely spread, the 

 absence of marginal spines on the outer rami of uropods 1-2 and the 

 absence of a subdistal spine on the ramus of uropod 3. Hurley's H. 

 grandicornis f. novizealandiae differs from the Valparaisan material in 

 all of these characters except possibly the sharp coxal cusps. He 

 found, however, a forma thomsoni which has a furry pereopod 4, only 

 one marginal spine on the outer rami of uropods 1-2 and no subdistal 

 spine on the ramus of uropod 3. He united H. novizealandiae with 

 H. grandicornis through this form. Stephensen also was of the opinion 

 that his specimens, from Tristan da Cunha, which lack fur on pere- 



