NO. 3583 COPEPODS — GRICE AND HULSEMANN 39 



Left fifth foot 5-segmented with hau" on mternal margin of second 

 and third segments. Right fifth foot 5-segmented. Total length 

 2.32 mm. Holotype: USNM 113537. 



^P Remarks: This species resembles the male of B. major (Wolfenden) 

 but the small size of the present specimen and the inflated and pube- 

 scent second segment of the left fifth foot will distinguish it from 

 B. major. 



Rhinotnaxillaris , new genus 



Type-species: Rhinomaxillaris hathyhia, new species. 



Rhinomaxillaris bathyhia, new species 



Figures 281-292 



Occurrence: Station 330 NV, 2000 to 1000 m, 1 9. 



Diagnosis (female) : Head and first thoracic segment incompletely 

 separate, fom'th and fifth thoracic segments incompletely separate. 

 Abdomen 4-segmented. Anal segment longer than preceding segment 

 and furca. Rostrum large and obtuse. First antenna reaching 

 to fifth thoracic segment. Segments 8 and 9, 24 and 25 fused. Exop- 

 pod of second antenna consisting of seven segments, about twice 

 the length of the endopod. JMandible palpus with two setae. First 

 maxilla with two setae on second inner lobe, five setae on endopod 

 and two setae on exopod. Second maxilla with 5 lobes bearing 1, 

 1, 3, 3, and 2 setae, respectively. Maxilliped large, with long and 

 coarse setae distally. Fu-st foot with 3-segmented exopod and 

 1-segmented endopod. Fu'st and second exopodal segments of first 

 foot without external spines. Exopods of second through fourth 

 feet broken off. Endopods of second foot 2- or 3-segmented, of 

 thu'd and fourth feet 3-segmented. Third endopodal segments 

 of thu'd and fourth feet with six setae. Total length 1.12 mm. 

 Holotype: USNM 113538. 



Remarks. — We found one female specimen of a calanoid copcpod 

 for which we establish a new genus and species. It was diflicult 

 to assign this species to an existing family. Characteristics of this 

 specimen can be found m the genera of the family Bathypontiidae 

 Brodsky: Bathypontia Sars, Temorites Sars, Zenkevitchiella Brodsky, 

 and Foxtonia Hulsemann and Grice . The last two of these genera 

 were tentatively placed in this family. 



The large, blunt rostrum of Rhinomaxillaris is similar to that foimd 

 in Bathypontia. There are 23 free segments in the first antenna of 

 all four genera mentioned except in the species Temorites discoveryae 

 Grice and Hulsemann. Segments 24 and 25 are fused in all species 

 in the family. In general, the second maxilla and the maxilhped 

 resemble those in the other genera in the family with respect to their 

 compact form and the strong, spinehkc setae on the endopods. The 



