SHARKS' TEETH AND CETACEAN BONES. 189 



TELEOSTEI. 



The solitary evidence of bony fishes from the deep-sea deposits obtained 

 by the "Albatross" is afforded by a small scapula brought up by the dredge 

 from Station 2. The paucity of fish-remains, other than teeth and otoliths, 

 has already been commented on as a striking fact, the explanation of which 

 is probably to be sought in their different chemical composition and lesser 

 density. 



CETACEA. 



Relatively few Cetacean remains are contained in the collection, fifteen 

 specimens having been dredged at Station 2 and seven at Station 13. 

 With the exception of several unrecognizable fragments, these consist of 

 the tympanic and petrous bones of dolphins (Globicephalus or allied forms) 

 and Ziphioid whales. The tympani and periotics usually occur in the 

 detached condition, but in one or two cases they remain fused. None of 

 these bones attain the size of the corresponding elements in Globicephalus 

 mclas of existing seas, and no large tympani of baleen whales, such as were 

 obtained by the " Challenger" Expedition, are represented in the collection. 

 Owing to lack of material for comparison, it is impossible to make more 

 than approximate determinations. Several of the better preserved ear- 

 bones are shown of the natural size in PI. 2, figs. 25-29. In PI. 1, fig. 24, 

 and PI. 2, fig. 30, is shown a peculiar bone of small size and dense structure, 

 with three projecting prongs, which may perhaps be regarded as a Cetacean 

 incus. 



