NO. 3583 COPEPODS — GRICE AND HULSEMANN 33 



on fused second basal segment and endopod, five setae on exopod. 

 Number of setae on lobes 1-6 of second maxiUa: 2, 2, 2, 3, 2, 1 respec- 

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

 Exopods and endopods of fifth feet 3-segmented, terminal segments 

 with one long seta and one short spine. Total length 1.82 mm. 

 Remarks: Although the first maxilla of the male has no second 

 inner lobe and fewer setae on the fused second basal segment and 

 endopod (one rather than three setae as in the female), the other 

 head appendages agree well with those of the female. The male 

 has not heretofore been described. Our findings of Euaugaytilus 

 longiseta represent a new record for the Indian Ocean. 



Euaugaptilus malacus, new species 



FiGUKEs 196-200 



Occurrence: Station 134 Be, 2000 to 1000 m, 1 9. 



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

 and fifth thoracic segments fused. Posterior lateral corner of fifth 

 thoracic segment rounded, set off by a slight indentation. Abdomen 

 3-segmented. Rostral filaments very slender. First antenna exceeds 

 end of furca but broken off at segment 22. Exopod of second antenna 

 8-segmented, shorter than endopod. Mandible blade obliquely cut 

 bearing two strong double-teeth and two slender, shorter teeth. 

 Endopod of mandible palpus rudimentary. First inner lobe of first 

 maxilla with six rather slender and elongate spines, second inner 

 lobe with one seta, third inner lobe lacking; fused second basal seg- 

 ment and endopod with one seta; exopod with two strong and one 

 weak seta; external lobe with three setae. Number of setae on lobes 

 1-6 of second maxilla: 0, 1, 2, 2, 2, 1, respectively. Number of setae 

 on first five lobes of maxilliped: 1, 2, 3, 2, 2, respectively. Endopods 

 and exopods of first through fifth pair of swimming feet 3-segmented. 

 Total length 3.29 mm. Holotype: USNM 113532. 



Remarks: Euaugaptilus malacus resembles E. Jacilis (Farran). 

 The obliquely cut mandible blade, the rudimentary endopod of the 

 mandible palpus, the lack of a blunt process on the outer margin of 

 the second and third exopodal segments of the third and fourth 

 swimming feet, and the small size of E. malacus will distinguish it 

 from E. jacilis. 



Euaugaptilus nodifrons (Sars, 1905) 



Figures 201-203 



Remarks: A dorsal view of the body, rostrum, and mandible 

 blade of the male are illustrated for the first time. Other appendages 

 of the male are shown by Sars (1924-25) and Sewell (1929). 



228-966—67 3 



