Agassiz — Albatross Expedition to the Eastern Pacific. 145 



gray, mottled and banded Copepods. Lucifer and Sergestes 

 were abundant in many of our hauls. Many species of Amphi- 

 pods were collected, Hyparids without number, especially where 

 the surface hauls were made among masses of Salpse, which, on 

 several occasions, formed a jelly of Tunicates. Several species 

 of Phronimse also occurred constantly in the tow nets. Sagittse 

 were very numerous, a large orange species being noteworthy. 

 Several species of Tomopteris, some of large size and brilliantly 

 colored, violet or carmine with yellow flappers, and two species 

 of Pelagonemerteans. Two species of orange-colored Ostracods 

 were also common, one having a carapace with a long spiny 

 appendage. We obtained several species of Pelagic Cephalo- 

 pods, Cranchia and Taonis among them. Two species of 

 Doliolum also occurred, but they were never as abundant as the 

 Salpse, two species of which often constituted the whole con- 

 tents of the net. 



In the surface and deeper tows we procured also a number 

 of Acalephs. We have thus far collected more than 50 species 

 of Medusae and Siphonophores, many of which have been 

 figured by Mr. Bigelow, differing from those of the 1891 Expe- 

 dition. Atollse and other deep-sea Medusae were common 

 within the 300 fathom line. 



The Salpse guts gave us, in addition to the finer tow nets, 

 immense collections of Padiolarians, Diatoms, and Dinoflagellata, 

 many of which have been considered to live at great depth and 

 upon the bottom. The number of Diatoms found in this tropi- 

 cal region is most interesting. They have usually been con- 

 sidered as characteristic of more temperate and colder regions. 

 On several occasions the surface waters were greatly discolored 

 by their presence, and the extent of their influence on the bot- 

 tom deposits is shown by the discovery of a number of localities 

 where the bottom samples at depths from 1490 to 2845 fathoms, 

 in the track of the great Peruvian current, formed a true infuso- 

 rial earth. 



The tow nets also contained many species of Hyalca, Cymbu- 

 lium, Styliolus, Cleodora, Tiedemannia, Clio, and the like. On 

 one occasion the mass of the pelagic hauls consisted entirely of 

 small brown Copepods, the contents of the tow nets looking 

 like sago soup. Another time Sagittal, Salpse, Diliolum and 

 Liriope, all most transparent forms, formed the bulk of the 

 tow net's catch. Again another time, Firoloides and Carina- 

 rias constituted the bulk of the haul. These catches, coming 

 on successive days or interrupted with hauls of more than 

 mediocre quality, show how hopeless it is at sea to make any 

 quantitative analysis of the pelagic fauna and flora at any one 

 station within the influence of such a great oceanic current as 

 the Chili and Peruvian stream. 



