PELAGIC AND INTERMEDIATE DEPTHS FAUNA. 13 



expedition of the '^ Albatross," in depths of less than 300 fathoms. In the 

 lines we ran across the great northerly current which sweeps along the 

 coasts of Peru and Chili and is deflected westward at the easterly corner of 

 the Galapagos Islands, we obtained with the tow-nets an unusually rich 

 pelagic fauna at depths less than 300 fathoms (PI. 3*"). We collected a 

 number of Schizopods, among them many beautifully colored Gnathophau- 

 siaj, Willemoesia, Eryonicus, Glyptocrangus, and pelagic Macrurans ; huge, 

 brilliant-red Copepods, as well as many other species of blue, gray, mottled, 

 and banded Copepods. EuphausiiB, Saphirinre, Phyllosoma, Thysanopoda, 

 Lucifer, and Sergestes were abundant in many of our hauls. Many species 

 of Amphipods were collected, Hyperids without number, especially where 

 the surface hauls were made among masses of SalpsB, which, on several 

 occasions, formed a jelly of Tunicates. Several species of Plironim* also 

 occurred constantly in the tow-nets. Sagitta3 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 Pelagoncmerteans and other pelagic Nemerteans. Two species 

 of orange-colored Ostracods were also common, one having a carapace with a 

 long spiny appendage. We obtained several species of pelagic Cephalopods, 

 Cranchia and Taonis among them, and one with telescopic eyes. Two 

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

 Salpae, two species of which often constituted the whole contents of the 

 tow-net. Appendicularise often swarmed and Pyrosomce were occasionally 

 found. 



In the surface and deeper tows we procured also a number of Acalephs. 

 We have collected more than 150 species of Medusie and Siphonophores, 

 many of which have been figured by Mr. Bigelow, differing from those of 

 the 1891 expedition. Atollse and other deep-sea MedusjB were common 

 within the 300-fathom line. 



Characteristic genera of the Humboldt current, both off the coast of Peru 

 and on the line Easter Island to the Galaimgos, are Atolla, Peripliylla (once), 

 Nauphanta, Jilginura, Crossota, Colobonema, Halicreas, Haliscera, Aequorea, 

 Ehegmatodes, Cunina, Solmissus, Pegantha, and a new genus closely allied 

 to Ptychogena ; among Siphonophores, Athorybia, Crystallodes, \'ogtia, 

 Physophora, Porpita; and among Ctenophores, Cestum, Beroe, Mertensia, 

 and Eucharis. There were many genera of very general distril)ution over 

 the whole area, especially Liriope, Geryonia, Rhopaionema, Solmaris, Ag- 



