NO. 3583 COPEPODS — GRICE AND HULSEMANN 35 



endopod of the fifth feet. E. quaesitus is also close to Euaugaptilus 

 hecticus (Giesbrecbt), but the shorter first antenna in E. quaesitus and 

 the more developed mandible palpus and blade distinguish these two 

 species. Finally, E. quaesitus differs from E. humilis Farran in its 

 shorter first antenna and the structure of the mandible blade and the 

 first maxilla, 



Euaugaptilus rectus, new species 



Figures 210-214 



Occiu-rence: Station 337B IK, 275 to 2250 m, 1 9. 



Diagnosis (female) : Head and first thoracic segment separate, 

 foiu'th and fifth thoracic segments fused. Posterior lateral corner 

 of fifth thoracic segment rounded. Eostrum consisting of two short 

 and stout cones. No rostral filaments. Exopod of second antenna 

 8-segmented. Mandible palpus with well-developed rami. Mandible 

 blade obliquely terminated. Fu"st maxilla with one seta on second 

 inner lobe, no seta on third inner lobe, thi'ee setae on fused second basal 

 segment and endopod, and foiu- setae on exopod. Second maxilla with 

 following setae number on lobes 1-6: 2, 1, 1, 3, 2, 3. Number of setae 

 on lobes 1-5 of maxilliped: 1,3,3,2,2. Exopod of first foot with one 

 external spine on fii'st segment, one external spine on second segment 

 and two external spines on third segment. Total length 7.98 mm. 

 Holotype: USNM 113534. 



Remarks: This species is similar to E. angustus (Sars) but the two 

 may be separated by the structiu-e of the rostrum (2-pointed in E. 

 rectus, rounded in E. angustus), and first foot (two external spines in E. 

 rectus, one spine in E. angustus). 



Euaugaptilus species 1 



Figures 215-224 



Diagnosis (female) : Head and first thoracic segment separate, 

 foiu-th and fifth thoracic segments fused. Genital segment more than 

 one-half the length of the abdomen. Rostral filaments small and fine. 

 First antenna exceeds fmra by last five segments. Exopod of second 

 antenna S-segmented. Mandible palpus without rami. First maxilla 

 with one seta on second inner lobe, no seta on third inner lobe, one seta 

 on fused second basal segment and endopod, and four setae on 

 exopod. Number of setae on lobes 1-6 of the second maxilla: 2, 2, 2, 

 3, 2, 3, respectively. Number of setae on lobes 1-5 of maxilliped: 1, 

 3, 3, 2, 2. Maxilliped with indented knob on posterior side. Exopods 

 and endopods of first through foiu-th feet 3-segmented. Third exo- 

 podal segment of third foot cup shaped with two rudimentary spines on 

 external margin and five setae on internal margin. Fifth feet with 3- 

 segmented exopods and endopods and with a small spine on the inne 

 side of the second exopodal segment. Total length 4.87 mm. 



228-966— G7 4 



