2 Bulletin American Museum of Natural History [Vol. LII 



Only a few fishes were taken in the four hauls deeper than 1000 

 fathoms, although invertebrates were well represented in number and 

 species. The fishes are Raja microtrachys, Bathysaurus mollis, Narcetes 

 stomias, Cyclothone acclinidens, Plectromus maxillaris, Lycodapus fierasfer, 

 Macrourus acrolepis, and Macrourus albatrossus. Single representatives 

 of Atlantic and Antarctic genera, Cyema, Bathysaurus, and Harriotta, 

 are new to eastern Pacific waters, the last being different from the 

 Atlantic form. 



Deep-sea fishes were sometimes taken in considerable numbers; at 

 station 5675 in 284 fathoms the dredge brought up fifty-nine Macrourus, 

 eighteen Catulus, and one Nemichthys. 



From station 5682 in 491 fathoms, there are forty-four fishes repre- 

 senting Macrourus, Merluccius, Alepocephalus, and Argyropelecus. 



Station 5693, in 457 fathoms, yielded thirty fishes of four genera. 

 Station 5696, in 440 fathoms, yielded nine species of fishes. 



At most stations where fishes were taken there was a much greater 

 weight and variety of invertebrates, good hauls of fishes, in fact, usually 

 depending on the abundance and variety of invertebrate life as repre- 

 sented by crustaceans, mollusks and annelids. Fishes were at times, 

 however, dredged with quantities of invertebrates showing nothing more 

 palatable than starfishes, sea urchins, and crinoids. 



It is probable that the deep-sea fishes already known to science 

 represent but a moderate proportion of those that move aside from the 

 path of the dredge, and that the discovery of other and larger forms 

 awaits the use of some larger apparatus. 



It is of interest to note that at station 5674, in 590 fathoms, three 

 fishes, Plectromus, Cyclothone and Serrivomer came up alive, a most 

 unusual occurrence in the case of fishes from such a depth. The differ- 

 ence between bottom and surface temperature at this station was 

 recorded as nineteen degrees. There is a difference of more than half 

 a ton to the square inch in sea pressure between the bottom at 590 

 fathoms and the surface, while the difference in the amount of light would 

 be equal to that between night and day. Such are the barriers between 

 the deep-sea and the shore faunae, even at this moderate depth. 



The records of bottom temperature kept during the voyage show 

 that, at depths greater than 500 fathoms, bottom temperatures ranged 

 from 37 to 39 degrees. In depths between 300 and 500 fathoms, bottom 

 temperatures were from 40 to 44 degrees. 



The greatest difference between bottom and surface temperatures 

 was found off Cape San Lucas, where at a depth of 630 fathoms the 



