REPORT ON THE DEEP-SEA DEPOSITS. 
271 
Atlantic Ocean. 
Station 131, 2275 fathoms. — A tympanic bulla, 2^ inches (63 mm.) in length, closely 
corresponding with that of Zi'phius cavirostris} 
Southern Indian Ocean. 
Station 143, 1900 fathoms. — A small indeterminable fragment of bone, about the size of 
a marble, consisting of cancellated tissue, and coated and impregnated with manganese. 
Station 160, 2600 fathoms. — Several tympanic bullae, three apparently allied toMesoplo- 
don^ another belonging to Delphinus, and a petrous bone apparently of a Globiocephalus; 
also a nodulated mass of bone, coated and impregnated with manganese, and three small 
fragments, one a flat bone. 
Pacific Ocean, 
Station 274, 2750 fathoms, — Tympano-periotic bone of Globiocephalus,^ another of 
one of the Delphinidse,^ another like that of a Mesoplodon, and six separate petrous 
bones and four separate tympanic bullse belonging to the smaller species of Cetacea ; 
also a small fragment of bone forming the nucleus of a manganese nodule. 
Station 276, 2350 fathoms, — Two tympano-periotic bones of Mesoplodon, closely 
resembling Mesoplodon layardi,^ eight separate petrous bones and six tympanic bullse, 
one of the latter belonging to Globiocephalus and another allied to Kogia, the rest 
apparently those of Delphinus. 
Station 281, 2385 fathoms, — Six tympanic bones, 1 to I5 inches (25 to 32 mm.) 
in length, and three petrous bones, all belonging to the family of dolphins. 
Station 285, 2375 fathoms. — Four tympanic bones, 2‘7 to 4‘7 inches (7 to 12 cm.) 
in length, belonging to the genus Balsenoptera f another closely allied, 3^ inches (9 cm.) 
in length ; twenty-five smaller tympanic bones and eighteen petrous bones, belonging to 
the genera Mesoplodon, Delphinus, and Globiocephalus; a petro-mastoid bone, 4 inches 
(10 cm.) in length, probably belonging to one of the Baleen whales ; and numerous small 
fragments of bone thickly coated with manganese. 
Station 286, 2335 fathoms. — About ninety tympanic bullae were recognised, and 
various fragments coated with and imbedded in manganese, which appeared to be portions 
of tympanic bones, in addition to forty-two detached petrous bones. A bulla nearly 
6 inches (15 cm.) in length, and a fragment of a similar bone, belong probably to 
Balsenoptera antarctica two bullae, one 3‘6 inches (91 mm.) the other 3*4 inches (86 
mm.) in length, belong probably to Balsenoptera rostrata ® (possibly Balsenoptera huttonil ) ; 
several bullae, about 3 inches (76 mm.) in length, belong to Balsenoptera, probably an 
extinct species.® Two bones, 3 inches (76 mm.) in length, probably belong to the 
1 Figured in Zool. Chall. Exp., pt. iv. pi. ii. fig. 10. 
2 See PL VIII. fig. 11. 3 gee PI. VIII. figs. 4, 5, ^ See PI. VIII. figs. 12, 13. 
5 See PI. VII. figs. 6, 7. « See PI. VII. fig. 1. ^ See PI. VII. fig. 2. 
® See PI. VII. fig. 3. ® Figured iu Zool. ChaU. Exp., pt. iv. pi. ii. fig. 11. 
