38 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 122 



(Sars, 1924-25). This is the first record of Pontoptilus rohustus in 

 the Indian Ocean. 



Pontoptilus lacertosus, new species 



Figures 259-265 



Occurrence: Station 347 A, IK, 350 to 2500 m, 1 9. 



Diagnosis (female) : Head and fu'st thoracic segment fused, fourth 

 and fifth thoracic segments fused. Fifth thoracic segment rounded. 

 Rostrum robust with a single point. First antenna exceeding furca by 

 about five segments. Mandible palpus with three setae. Blade 

 resembling that of P. ovalis Sars. First maxilla with five setae on 

 second inner lobe, four setae and a small spine on the endopod, two 

 setae on the second basal segment, five setae on the endopod, three 

 setae on the exopod and one seta on a lobe located just ventrad of the 

 exopod. Setae on lobes 1-5 of the second maxilla as follows: 8, 3, 3, 

 3, 3, respectively. Fu-st to fourth swimming feet with 3-segmented 

 exopods and endopods. Fifth feet- with 3-segmented exopods, 2-seg- 

 mented endopods. Total length 7.17 mm. Holotype: USNM 

 113535. 



Remarks: P. lacertosus differs from P. ovalis Sars, a species it re- 

 sembles, in the presence of a rostrum and additional setae on the 

 second basal segment, endopod and exopod of the first maxilla. 



Phyllopus muticus Sars, 1907 



Figures 266-270 



Remarks: A very large female (total length 7.21 mm) was found 

 at one station. Figures of this specimen including illustrations of 

 some appendages not heretofore figured are given here. 



Bathypontta elongata Sars, 1905 



Figures 271-274 



Remarks: Several figures of the male are given here. The rostrum 

 of the male is rounded and unlike that found in the female. Total 

 length 4.68 mm. Bathypontia elongata has not previously been 

 reported from the Indian Ocean. 



Bathypontia regalis, new species 



Figures 275-280 



Occurrence: Station 338 NV, 3000 to 2000 m, 1 cf. 



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

 fourth and fifth thoracic segments separate. Posterior lateral comer 

 of fifth thoracic segment broadly rounded. Rostrum robust and 

 rounded. Exopods of first through fourth feet 3-segmented, endopods 

 of first foot 2-segmented, of second through fourth feet 3-segmented. 



