22 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 122 



Remarks: The knoblike protrusions of the fifth thoracic segment 

 and the number of setae on the first maxilla will distinguish this 

 species from S. polaris Brodsky, a species it resembles, 



Spinocalanus species 



Figure 35 



Remarks: A single male specimen with fifth feet similar to S. 

 longipes is here tentatively referred to the genus Spinocalanus. 

 The left exopod is greatly elongate and the endopod is rudimentary. 

 The right foot is small, 1-segmented, and does not exceed the second 

 basal segment of the left foot. The total length of the specimen 

 is 1.28 mm. 



Teneriforma, new name 

 Tenerifortna naso, new combination 

 Figures 36-38 

 Tanyrhinus naso Farran, 1936, pp. 86-87, text-fig. 4. 



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

 fourth and fifth thoracic segments separate. Furca approximately 

 equal to combined length of fourth and fifth abdominal segments. 

 Rostrum large and curved posteriorly. First antenna with 24 free 

 segments (8 and 9 fused), reaching to end of furca. Fifth feet uni- 

 ramous and asymmetrical. Left foot elongate and consisting of 

 five segments. Right foot small and consisting of two segments. 

 Total length .92 mm. USNM 113514. 



Remarks: The male of this monotypic genus has not previously 

 been described. Since the name Tanyrhinus has been used for a 

 genus of insects (Coleoptera) by Mannerheim in 1852 (Bidl. Soc. 

 Imp. Nat. Moscou, vol. 25, no. 2, p. 349), the genus is here renamed 

 Tenerijorma. This is the first record of Tenerijorma naso from 

 the Indian Ocean. 



Aetideopsis retusa, new species 



Figures 39-45 



Occurrence: Station 342 NV, 3000 to 1980 m, 1 9. 



Diagnosis (female) : Head and first thoracic segment incompletely 

 separate. Fourth and fifth thoracic segments separate. Rostrum 

 distinct, rami separated by deep invagination. Frontal organ prom- 

 inent and visible in dorsal view. Posterior lateral corner of fifth 

 thoracic segment acutely pointed. First antenna exceeds furca by 

 last two segments. Total length 1.96 mm. Holotype: USNM 113515. 



Remarks: This species is distinguished from others in the genus 

 by its small size and long first antenna. 



