12 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 122 



Three of the four collections in which we recognized Antarctic species 

 were obtained from stations located between 35°S and 40°S, which is 

 in the area of the subtropical convergence. The other collection where 

 one Antarctic species occurred was obtained from 29 °S. 



The species in our collections that are especially indicative of Ant- 

 arctic or sub-Antarctic waters and which have not been reported from 

 elsewhere are Calanus australis Brodsky, Euchaeta biloba (Farran), and 

 Scolecithricella dentipes Vervoort. Rhincalanus gigas Brady, a species 

 much more important in the Antarctic because of its great abundance 

 there, occurred in three of our collections made south of 35 °S and in 

 one collection made at 29°S. These four species were obtained in the 

 Be net and midwater trawl and were probably collected in the upper 

 few hundred meters (see "Methods and Materials"). The occurrence 

 of R. gigas at 29°S is considerably north of the subtropical convergence 

 (approximately 40°S) and probably represents the northernmost dis- 

 tribution record for this species in the Indian Ocean. Thompson's 

 (1900) report of R. gigas from 20 °S has been questioned by Sewell 

 (1929). Mefridia lucens Boeck was also present in one sample (Be net) 

 from 35°S. It occurs in the North Atlantic and North Pacific Oceans 

 and is also present in waters of high latitudes in the Southern Hemis- 

 phere. Thus, the above five species comprise the Antarctic element in 

 our Indian Ocean copepod species. 



Indian Ocean species. — There are few species in the Indian Ocean 

 including the epi-planktonic ones that are not found elsewhere. Out 

 of a total of 310 species found by us, 40 are not found in the Atlan- 

 tic Ocean. Of these 40, however, only 7 — Bradycalanus gigas Sewell, 

 Amallothrix indica Sewell, Scottocalanus dauglishi Sewell, Lvcicutia 

 hella Hulsemann, L. pallida Hulsemann, L. rara Hulsemann, Euau- 

 gaptilus indicus (Sewell) — are apparently restricted to the Indian 

 Ocean. The remaining ones are also present in Pacific or Antarctic 

 waters. The above 7 species are in addition to the 17 species 

 indicated by Sewell (1947, p. 540) as being possibly endemic to the 

 Indian Ocean. Actually, due to subsequently pubUshed distribution 

 records, 3 of these 17 species have been reported from the Pacific: 

 Chirundina indica (Grice, 1962), Cornucalanus indicus (Brodsky, 

 1950; Tanaka, 1960), Lucicutia aurita (Tanaka, 1963, as L. maxima). 

 Further, L. aurita has been found in the Malay Archipelago (Scott, 

 1909) and near the island of South Georgia (Gunther and Hardy, 

 1935), both times reported as L. maxima (see Hulsemann, 1966). 



Our list of 310 species includes 78 that have not hitherto been 

 reported from the Indian Ocean. This is not unexpected since the 

 bathypelagic species have not been studied as extensively as the 

 epipelagic ones. The discovery of 17 new species, which are described 



