EASTMAN : SHARKS TEETH AND GKTACEAN BONES. 



79 



The next and most recent supply of material was furnished by the 

 "Albatross" Expedition of 1904-1905. The general course of this 

 cruise may be compared to the letter W, the base resting upon Manga 

 Reva and Easter Island, and tlie thi'ee upper points touching at 

 Acapulco, the Galapagos and Callao. In addition, a shorter series 

 of zigrzasis were run between Panama on the north, and Callao on the 

 south. These routes are all indicated on the accompanying chart (PI. 

 3), as are also the limits of the extensive barren area described by Mr. 

 Agassiz. It is noteworthy that the stations from which the largest indi- 

 vidual hauls were made lie in about the middle of this belt, the greater 

 plentifulness of remains suggesting that creatures here perished in larger 

 numbers tlian the general average elsewhere, in consequence of the pre- 

 vailing starvation diet. All of the remains collected by this Expedition 

 showed a lighter encrustation of manganese as compared with those 

 obtained by previous dredgiugs. Some of the Zipiiioid ear-bones pre- 

 sented a remarkably fresh appearance, implying recent burial ; amongst 

 sharks' teeth on the other hand, the root, dentine, and all tissues 

 except the enamel were invariably dissolved away. That many of these 

 specimens have remained unburied on the ocean floor since late Tertiary 

 times is rendered probable by the fact of their belonging to extinct 

 species. The following tabulation of results may be compared with 

 those given above for previous Expeditions. 



List of "Albatross" Stations (1904-05) Yielding Vertebrate 



Remains. 



