74 



parts of the world. Nemat. Agassizii Faxon ranges from Acapulco on the west coast of Mexico 

 to the Gulf of Panama and the Galapagos Islands. Nemat. Ivngirostris Bate is still only known 

 from near Yokohama, Japan, but Nemat. proximatus, which Spexce Bate himself is inclined 

 to regard as a variety of longirostris, has been obtained not only also off Yokohama, in the 

 Arafura Sea and near Marion Island in the southern Indian Ocean, but even off the coast of 

 Chili, an almost cosmopolitan distribution indeed ! Nemat. altus Bate is still only known from 

 south of the Philippine Islands and Nemat. intermedius Bate only from off the north coast of 

 New Guinea. A third or fourth species, inhabiting the seas of Japan, is Nemat. fiarvirfentatus 

 Bate, which, according to the Rev. Stebbing, should live also off Cape Natal, South Africa. 

 Nemat. lanceopes Bate is a form inhabiting the Antarctic Sea (South-east of Kerguelen Island 

 and off Coats Land) and which should also occur off Cape Point, South Africa. Nemat. gracilis 

 Bate ranges from the Hawaiian, Fiji and Kermadec Islands through the Indian Archipelago as 

 far as the Arabian Sea. Nemat. undulatipes Bate is known from off the Philippine Islands, the 

 Banda Sea, the Fiji Islands and the Kermadec Islands, while many specimens were collected 

 by the "Siboga" at eight Stations throughout the whole Archipelago. Nemat. tenuirostris Bate 

 shows the same distribution as Nemat. gracilis, from the Hawaiian and Fiji Islands to the 

 Gulf of Manar : a nice variety Sibogae was discovered by this expedition south of the island of 

 Rotti. Two species, finally, are found off the coast of New Zealand : Nemat. serratus Bate and 

 Nemat. hiatiis Bate. 



As results from the preceding, the Indian Archipelago seems therefore to be inhabited 

 by 6 species and one variety. Three species and that variety were collected by the "Siboga", 

 the other ones are Nemat. a/tus Bate, a still little known form, Nemat. proximatus Bate from 

 the Arafura Sea and, finally, Nemat. tenuirostris Bate. 



All the species of this genus are found in deep water, though the depth varies considerably, 

 as results from the List at the following pages. The greatest depth recorded is of Nemat. altus, 

 which was taken in 2150 fathoms, Nemat. ensifcr was found in 2033, the variety exilis in 

 1980, the variety producta, Nemat. longirostris, parvidentatus and proximatus in 1875 fathoms; 

 Nemat. ensifer was, however, also observed at a depth of 5 88 fathoms, the other species 

 also in much less deep water. On one occasion several specimens of Nemat. proximatus were 

 dredged by the "Challenger" in the Arafura Sea in only 28 fathoms, but this has been, no doubt, 

 a rare exception. Excepting Nemat. gracilis and tenuirostris, all the other species were taken 

 in more than 200 fathoms. 



LIST OF THE SPECIES OF THE GENUS NEMATOCARCINUS A. M.-Edw., 



KNOWN AT PRESENT, February 191 7. 



SPECIES 



HABITAT 



DEPTH IN FATHOMS 



Agassizii Faxon 1893 



altus Bate 1888 



West coast of Mexico (Acapulco) 



Gulf of Panama 



Galapagos Islands 



South of the Philippine Islands 



660 

 134 — 1020 



551-885 

 2150 



