EASTMAN: SHARKS' TEETH AND CETACEAN BONES. 81 



73 sharks' teeth, 5 of which belong to Carcharodon, the rest to Lamna and 

 Oxyrhina. Some of the teeth are embedded in nodular masses ; none 

 have the crowns heavily encrusted, but the majority have dark brown 

 clay adhering to them. Cetaceans are represented by 5 Delphinoid ear- 

 bones ; the tympano-periotic of one individual consists of a single piece. 



Station 4693, depth 1142 fathoms. — According to the published 

 record of " Albatross " dredging stations, in the General Report of the 

 Expedition, 1 sharks' teeth and Cetacean bones came up in the trawl at 

 this locality. None such are contained, however, in the collection sub- 

 mitted for examination, the only specimen marked with this station 

 number being a well preserved tergum of Lepas. 



Station 4695, depth 2020 fathoms. — The vertebrate remains dredged 

 at this point are confined to two small and tolerably fresh-looking 

 Oxyrhina teeth. 



Station 4701, depth 2265 fathoms. — 8 sharks' teeth, including 1 

 large and beautifully preserved Carcharodon, wholly unencrusted, also 1 

 large and G smaller Oxyrhina teeth, very lightly coated ; 2 Delphinoid 

 ear-bones, likewise with very little coating. 



Station 4709, depth 2035 fathoms. — 2 small fresh-looking Lamna 

 teeth ; 2 heavily encrusted ear-bones of Hyperoodon, one indeterminate 

 elongate bone, and several smaller fragments ; also 9 lightly coated 

 Delphinoid ear-bones. 



Station 4711, depth 2240 fathoms. — Two very slightly encrusted 

 Lamna teeth; 2 Delphinoid ear-bones, one being a large, very heavily 

 encrusted tympanic, the other a moderately coated tympano-periotic ; 

 also a number of corroded fragments, all charged with manganese, and 

 betraying only obscure indications of organic origin. 



Station 4721, depth 2084 fathoms. — No fish remains; 4 Delphinoid 

 ear-bones, and 3 of Kogia or some very similar form. 



Station 4732, depth 2084 fathoms. — No fish remains ; 4 Delphinoid 

 tympani, 3 specimens of Kogia, one having the tympanic and periotic 

 fused, all lightly coated with manganese. 



Station 4732, depth, 2012 fathoms. One splendidly preserved Car- 

 charodon crown without manganese coating, but with several worm- 

 tubes adhering to it (Plate 2, Fig. 20) ; no Cetacean bones. This and 

 the next following station lie within the barren area. 



Station 4736, depth 2289 fathoms. 1 small Carcharodon, 6 Oxyrhina, 

 13 large-sized Lamna teeth, all stained dark brown and very thinly 

 coated with manganese ; 3 Delphinoid tympani, and 1 much decayed 



1 Mem. Mus. Comp. Zool., 1906, 33, p. 44. 

 vol. l. — No. 4 6 



