NO. 3583 COPEPODS — GRICE AND HULSEMAKN 21 



Mimocalanus species 



Figures 19-25 



Remarks: We are tentatively assigning the two males to this 

 genus. The fifth feet are unu-amous and styliform. The terminal 

 segments of the exopods each have a long spine. The fifth feet of 

 M. cultrifer and M. nudus are not so elongate and the terminal seg- 

 ments of the exopods have short spmes. The total length of both 

 specimens is .78 mm. 



Spinocalanus longipes Tanaka, 1956 



Figures 26-27 



Remarks: We are referring thi'ee male specimens to this species 

 although, as Johnson (1963) points out, the fifth pair of feet is most 

 unlike any described Spinocalanus. The total length of the three 

 specimens ranges from 1.60 to 1.76 mm. Spinocalanus longipes 

 has not previously been reported from the Indian Ocean. 



Spinocalanus magnus Wolfenden, 1904i 



Remarks: Small differences were noted in the ornamentation (hair, 

 spines) of the terminal exopodal segments of the fifth feet of the 

 present male and that described by Tanaka (1956). The total length 

 of our two male specimens is 2.00 mm. 



Spinocalanus validus Sars, 1905 



Figures 28-31 



Diagnosis (male): Anterior end of head knoblike, lateral margin 

 of third thoracic segment with protuberances. Exopods and endopods 

 of fifth feet very elongate, second and third right exopodal segments 

 pubescent. Total length 5.08 mm. 



Remarks: The male of this species, heretofore unl?:nown, is distin- 

 guished by its large size and details of the fifth feet. Our findings of 

 Spinocalanus validus constitute a new record for the Indian Ocean. 



Spinocalanus ventriosus, new species 



Figures 32-34 



Occurrence: Station 332 NV, 2000 to 1002 m, 2 99; 332 NV, 

 3000 to 2000 m, 3 99; 338 NV, 2000 to 1000 m, 2 99; 340 NV, 2950 

 to 1990 m, 1 9; 349 NV, 2000 to 1000 m, 1 9. 



Diagnosis (female) : Head and first thoracic segment incompletely 

 separated, fifth thoracic segment ends in rounded protrusions. First 

 maxilla with four setae on second inner lobe, three on third inner 

 lobe, four on second basal segment and nine on endopod. Total 

 length 1.32-1.52 mm. Female from station 349 is holotype. Holo- 

 type: USNM 113513. 



