GAMMARIDEAN AMPHIPODA 



87 



spines, bearing medial row of four large setae, dactyl fitting palm, 

 strongly curved ; gnathopod 2 stout, article 4 miusually short, article 

 5 stout, palm cheliform; pereopods 1 and 2 unusually setiferous, 

 pereopod 2 bearing anterior spines on article 2 but spines absent on 

 pereopod 1, posterior edge of article 5 on both pereopods bearing 

 stout spines, posterior margin of article 6 on pereopod 1 bearing one 

 spine, on pereopod 2 bearing two spines; posterior lobe on article 2 

 of pereopod 5 slightly concave posteriorly and minutely serrate; pos- 

 teroventral corners of pleonal epimera 1 and 2 rounded and subquad- 

 rate respectively, epimeron 3 prolonged into large posterior tooth; 



Figure 4l.—Ur{stes (?) perspmis, new species, holotype, female, 3.0 mm, 7229: a, epistome- 

 labrum complex; b, antenna 2; c, telson; d, distal end of pereopod 2; e, mandible; /, maxil- 

 liped; g, distal end of pereopod 1; h-j, uropods 1,2,3. 



dorsoposterior surface of pleonite 3 slightly enlarged and bulbous; 

 pleonite 4 scarcely produced dorsally ; rami of uropods 1 and 2 with 

 at least 1 spine each, no ramus constricted ; inner ramus of uropod 3 

 slightly exceeding article 1 of outer ramus; telson with narrow, acute 

 apices, each bearing medial subapical notch armed with one spine. 



Remarks. — Maxilla 1 like that of Centromedon jni/milus (Sars, 1895, 

 pi. 34, fig. 2), outer lobe having 11 spines; maxilla 2 like that of 

 '"Tryj^hosa" sarsi (Sars, 1895, pi. 27, fig. 1). 



Holotype. — AHF No. 6040, female, 3.0 mm. 



Type-locality.— Station 7229, 27°54'25'' N, 115°40'00'' W, 1720- 

 1748 m, Dec. 31, 1960. 



Material. — Two specimens from the type-locality. 



