20 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 122 



ACARTIIDAE 



308. Acariia danae Giesbrecht, 1889 38,42,45 



309. A. negligens Dana, 1849 5, 31, 32, 34, 36, 38-40, 43-45, 48 



INCERTAE SEDIS 



310. Male 41 



Calanus australis Brodsky, 1959 



Figure 3 



Remarks : In dorsal view the slightly produced anterior end of the 

 head and the narrow fifth thoracic segment make the specimen refer- 

 able to Brodsky's C. australis var. atlanticus. Brodsky (1959) sug- 

 gests that this is a species of temperate latitudes in the Southern 

 Hemisphere. The single specimen was found in the Be net sample at 

 35°09' S, 69°59' E. This is the first record of C. australis from the 

 Indian Ocean. 



Farrania frigida (Wolfenden, 1911) 



Figures 4-15 



Diagnosis (male) : Fifth thoracic segment small and rounded. 

 First antenna reaches to end of furca, segments 20-21 (fused) and 22 

 of right antenna each with patch of thick hair. Proximal end of 

 first antenna highly setose and provided with aesthetasks. Fifth 

 feet asymmetrical, right foot longer than left one. Right exopod 3- 

 segmented, terminal segment provided with 2 terminal setae and sub- 

 terminal hair. Endopod represented by small, bulblike protuberance. 

 Left exopod 3-segmented. Two unequal spines on terminal segment 

 and one spine on distal lateral comer of first segment. Endopod con- 

 sists of small rounded protuberance. Total length 2.34 mm. 



Remarks: The male of this species, not heretofore known, is dis- 

 tinguished from the male of F. orbus (Tanaka) by the rounded fifth 

 thoracic segment and the structure of the fifth feet. 



Mimocalanus inflatus? Davis, 1949 



Figures 16-18 



Remarks: As the swimming feet are broken off in both specimens 

 examined it is not possible to determine whether the second endopodal 

 segments are inflated as they are in Pacific and Atlantic specimens 

 of M. inflatus. The Indian Ocean specimens have five setae on the 

 second inner lobe and four setae on the second basal segment of 

 the first maxilla. There are four setae and five setae on the corre- 

 sponding structures of the second maxilla of the Atlantic Ocean speci- 

 men described by Grice and Hulsemann (1965). The total length of 

 the present specimens is 1.76 and 2.01 mm. Mimocalanus inflatus 

 has not previously been reported from the Indian Ocean. 



