40 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 122 



first and second exopodal segments of the first foot lack external spines 

 as is the case in Bathypontia, Temorites, and Foxtonia. The absence 

 of fifth feet is common to the female of Foxtonia. 



The new genus Rhinomaxillaris is distinguished from Bathypontia 

 and Temorites by the long exopod in the second antenna, the shape 

 and arrangement of the teeth on the mandible blade, and the absence 

 of fifth feet. Rhinomaxillaris differs from Zenkevitchiella and Fox- 

 tonia in the long exopod of the second antenna, the mandible blade, 

 and the peculiar rostrum. From Zenkevitchiella, Rhinomaxillaris is 

 further distinguished by the absence of external spines on the first and 

 second exopodal segments of the first foot, and the absence of fifth 

 feet. It differs from Foxtonia in the increased number of segments 

 in the endopods of the second and third feet and in the absence of 

 spinelike setae between the bases of the first antenna. Rhinomaxil- 

 laris also resembles certain genera in the family Pseudocalanidae. 

 The large and blunt rostrum, the fused 24th and 25th segments in the 

 first antenna, and the absence of external spines on the first and second 

 exopodal segments of the first foot prevent Rhinomaxillaris from being 

 placed in this family. 



Until a female with intact swimming feet and a male are found, it 

 is not possible to establish the true familial relationship of Rhinomax- 

 illaris. In the meantime we have tentatively placed it in the family 

 Bathypontiidae with the full realization that until this family is criti- 

 cally studied it may represent a composite of unrelated genera. 



Until additional species are discovered, the genus Rhinomaxillaris 

 cannot be diagnosed. 



Zenkevitchiella atlantica Grice and Hulsemann, 1965 



Remarks: In the single specimen found segments seven and eight 

 of the first antenna are fused as is shown in figure 22(a) in our descrip- 

 tion of this species from North Atlantic specimens (Grice and Hulse- 

 mann, 1965) and not segments eight and nine as stated in the text. 

 Segments 24 and 25 are fused and not segments 23 and 24 as also 

 stated in the text. The distal end of the first antennae are broken 

 off in the Indian Ocean specimen. It may be added here that in the 

 male of Zenkevitchiella atlantica described by us (1965), segments 

 seven and eight of the first antenna are fused. No male of this 

 species has yet been found in the Indian Ocean. The occurrence of 

 a female of Zenkevitchiella atlantica represents a new record for the 

 Indian Ocean. 



Zenkevitchiella crassa, new species 



Figures 293-305 



Occiu-rence: Station 340 NV, 2950 to 1990 m, 1 d'. 



Diagnosis (male): Head and first thoracic segment incompletely 



