84 
THE VOYAGE OF H.M.S. CHALLENGER. 
Station 254, July 17, 1875 ; Yokohama to Sandwich Islands; lat. 35° 13' N., 
long. 154° 43' W. 
II. Deposit shells. 
Station 78, July 10, 1873; off the Azores; lat. 37° 26' N., long. 25° 13' W.; depth, 
1000 fathoms; bottom, volcanic mud. 
Station 120, September 9, 1873; off the coast of South America, between Pernam- 
buco and Bahia; lat. 8° 37' S., long. 34° 28' W.; depth, 675 fathoms; bottom, red mud. 
# 7. Cavolinia uncinata (Rang). 
1836. Hijalsea uncinata, Rang, MS., in d’Orbigny, Voyage dans l’Amerique meridionale, t. v. 
p. 93, pi. v. figs. 11-15. 
1850. Cavolina uncinata, Gray, Catalogue of the Mollusea in the Collection of the British 
Museum, pt. ii., Pteropoda, p. 7. 
1880. Hyalxa uncinatiformis, Pfeffer, Die Pteropoden des Hamburger Museums, Ahhandl. 
Naturw. Ver. Hamburg, Bd. vii. p. 85. 
For description and figures, see Boas, Spolia atlantica, p. 119, pi. i. fig. 10; pi. ii. 
fig. 20. 
The position of a distinct species cannot be allowed to the form Hyalsea uncinati- 
formis, which Pfeffer only distinguishes by certain features of colour and size. 
Habitat. — Atlantic Ocean ; from 40° 5' N. (Verrill) to the Cape of Good Hope 
(British Museum), towards both Old and New Worlds. 
Indian Ocean; from the Gulf of Bengal (15° 30' N.) to 40° S-, from Africa, Red Sea 
(British Museum), south-east of Arabia (Blanford) to near Australia, 111° 40' E. (Boas). 
Pacific Ocean ; western portion, Yedo, Yellow Sea (British Museum), China Sea 
(Boas); eastern portion from 2° O' N. to 8° 8' S. (“ Vettor Pisani” Expedition). 
Challenger Specimens. — I. Living specimens. 
Station 100, August 16, 1873 ; St. Yincent to St. Paul’s Rocks; lat. 7° 1' N., 
long. 15° 55' W. 
August — September 1875 ; Sandwich Islands to Tahiti. 
II. Deposit shells. 
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 85, July 19, 1873 ; off Palma Island (Canaries); lat. 28° 42' N., long. 18° 6' 
W.; depth, 1125 fathoms; bottom, volcanic mud. 
Station 120, September 9, 1873; off the coast of South America, between Pernam- 
buco and Bahia; lat. 8° 37' S., long. 34° 28' W.; depth, 675 fathoms; bottom, red 
mud. 
