EEPOET ON THE PTEEOPODA. 
31 
The umbilicus of the shell is almost imperceptible. There is no tentacular lobe to 
the fin, as Boas has already noted. 
Habitat. — Atlantic Ocean, from 40° S. to 30° N. ; Indian Ocean, south-east of 
Arabia (“Vettor Pisani” Expedition, March 8, 1885); Pacific Ocean, Botany Bay 
(Angas); 1 China Sea and West Pacific to 40° N. (“Galathea” Expedition); Equa- 
torial Pacific, South Pacific to 37° S. (Knocker); South-east Pacific (d’Orbigny). 2 
The empty shells of this species have been gathered from the deep-sea deposits in the 
Mediterranean, where the species is no longer found alive, in the Aegean Sea (Jeffreys), 
aud in the Mediterranean dredgings of the “Travailleur” (Fischer); 3 in the North Atlantic 
(by the “Valorous ” Expedition, 4 and by the first “Porcupine” Expedition, 1869). 
Challenger Specimens. — I. Living specimens. 
Between Stations 162 and 163, April 3, 1874 ; Melbourne to Sydney ; lat. 38° 7' S., 
long. 149° 18' E. 
Station 175, August 12, 1874 ; Fiji to Raine Island ; lat. 19° 2' S., long. 17 7° 10' E. 
Station 181, August 25, 1874 ; Fiji to Raine Island ; lat. 13° 50' S., long. 151° 49' E. 
Station 201, October 26, 1874 ; Amboina to Samboangan ; lat. 7° 3' N., long. 
121° 48' E. 
Station 243, June 26, 1875 ; Yokohama to Sandwich Islands; lat. 35° 24' N., long. 
166° 35' E. 
Between Stations 247 and 248, July 4, 1875; Yokohama to Sandwich Islands; 
lat. 36° 42' N., long. 179° 50' W. 
Station 337, March 19, 1876 ; Tristan da Cunha to Ascension Island; lat. 24° 38' S., 
long. 13° 36' W. 
On April 26, 1876 ; off St. Vincent (Cape Verde) ; lat. 16° 49' N., long. 25° 14' W. 
Near Station 354, May 7, 1876 ; off Azores; lat. 34° 22' N., long. 34° 23' W. 
II. Deposit shells. 
Station VIII., February 12, 1873; off Canary Islands; lat. 28° 3' 15" N., long. 
17° 27' 0" W.; depth, 620 fathoms; bottom, volcanic mud. 
Station 3, February 10, 1873; Tenerife to Sombrero Island; lat. 25° 45' N., long. 
20 14' W.; depth, 1525 fathoms; bottom, hard ground. 
Station 23, March 15, 1873 ; off Sombrero Island ; lat. 18° 24' N., long. 63° 28' W.; 
depth, 450 fathoms ; bottom, Pteropod ooze. 
Station 24, March 25, 1873 ; off Culebra Island ; lat. 18° 38' 30" N., long. 65 5' 30" 
W.; depth, 390 fathoms; bottom, Pteropod ooze. 
Station 32b, April 3, 1873 ; St. Thomas to Bermuda ; lat. 32° 10' N., long. 64 52' W.; 
depth, 950 fathoms ; bottom, coral mud. 
1 Angas, Proc. Zool. Soc. Lond ., 1871, p. 99. 
2 It is cited from Sicily after Allery by Tiberi, Ann. Soc. Malacol. Belg., t. xiii. p. 76. 
3 Gomptes rendus, t. xciv. p. 1201. 4 Ann. and Mag. Nat. Hist ., ser. 4, vol. xix. p. 33 1 . 
