32 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 122 



Remarks: Euaugaptilus curtus resembles E. longiseta Grice and 

 Hulsemann. The former species differs from the latter, however, in 

 having two teeth on the mandible blade, a uniramous mandible palpus, 

 and a more reduced first maxilla. 



Euaugaptilus fundatus, new species 



Figures 187-192 



Occurrence: Station 108 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. Abdomen 3-segmented. Genital segment 

 longer than the two following combined. Rostral filaments slender, 

 broken short. Fu'st antenna exceeding end of f urea by about last three 

 segments. Exopod of second antenna 8-segmented. Mandible palpus 

 biramous, endopod small, ending in one setae. Mandible blade with 

 two strong teeth, each with a small side tooth, and one large seta. First 

 inner lobe of first maxilla with f oiu* spines ; second and third inner lobes 

 absent; fused second basipodal segment and endopod with one seta; 

 exopod with five setae, the two terminal ones largest; external lobes 

 with five setae, the middle one being the largest. Number of setae 

 on lobes 1-6 in the second maxilla: 3, 2, 2, 2, 2, 1, respectively. Two 

 setae each on lobes 3-5 of the maxiUiped. Exopod of first swimming 

 foot consisting of three segments, endopod of two segments. Groups 

 of small hairs near base of external spines of second and third exopodal 

 segments. Exopods and endopods of second to fifth swimming feet 

 3-segmented. Total length 3.64 mm. Holotype: USNM 113530. 



Remarks: Euaugaptilus jundatus resembles E. longiseta Grice and 

 Hulsemann and E. curtus. It is distinguished from these by the 

 structure of the mandible blade and palpus, and the development 

 of the first and second maxilla. 



Euaugaptilus humilis Farran, 1926 



Remarks: These specimens agree in those details discussed by 

 Grice (1963) : presence of rostral filaments, symmetrical furcae, sym- 

 metrical genital segment, and the presence of a second inner lobe 

 on the first maxilla. Euaugaptilus humilis has not previously been 

 reported from the Indian Ocean. 



Euaugaptilus longiseta Grice and Hulsemann, 1963 



Figures 193-195 



Diagnosis (male) : Rostrum small with slender filaments. Right 

 furca shorter than left. First antenna exceeds end of furca by last 

 four segments. Exopod of second antenna 7-segmented. Mandible 

 palpus biramous, blade as in female. First maxilla with one seta 



