14 "ALBATROSS" EASTERN TROPICAL PACIFIC EXPEDITION". 



laura, ^ginella, Cytaeis, Diphyopsis, Dipliyes, Praya, Galeolaria, Rhizophysa, 

 Cymba, Bassia, and very numerous monogastric forms, as Urstea, Eudoxia, 

 Eudoxella. Aglaisma, and Agalmid larvae. In the barren area south and 

 west of the Humboldt current few forms were taken except Tiriope. Rhopal- 

 onema, Aglaura, Pelagia, Tiara, Cytaeis, Diphyopsis, Porpema, Sphaeronectes, 

 and one specimen of Stephanomia. Off the coast of Mexico we took Velella, 

 Porpita, Physalia, Cestum, and Cunina, and in Acapulco Harbor a large 

 number of Leptoline forms, among them Zanclea, Pennaria, Ectopleura, 

 Cytaeis, Limnorea, Willia, Bougainvillia, Stomotoca, Phortis, Eucheilota, 

 Oceania, besides Ehopalonema, Cunina, Ocyroe, Mnemiopsis and Agalma 

 and Diphyes. A few Sertularians were brought up in the trawl. 



The Salpce guts gave us, in addition to the finer tow-nets, immense 

 collections of radiolarians, diatoms, and dinoflagellata, many of which have 

 been considered to live at great depth and upon the bottom. It is most 

 interesting to note the number of diatoms found in this tropical region. 

 They have usually been considered as characteristic of more temperate and 

 colder regions. On several occasions the surface waters were greatly dis- 

 colored by their presence, and the extent of their influence on the bottom 

 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 curi'ent, formed a true infusorial earth. 



The tow-nets also contained many species of Limacina, Spirialis, Atlanta, 

 Cavolina, Hyala, Cymbulia, Styliola, Cleodora, Tiedemannia, Clio, and the 

 like. Or 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 Sagittae, Salpae, Doliolum, and Liriope, all most transparent 

 forms, formed the bulk of the tow-net's catch. Again another time, Firo- 

 loides, Cymbulia, and Carinaria constituted the bulk of the haul. At other 

 times Euphausiae and Schizopods constituted the mass of our catch. These 

 catches, coining 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 influ- 

 ence of such a great oceanic current as the Chili and Peruvian stream. 



We came across such huge masses of pelagic surface animals at Station 

 4647 consisting mainly of Cytaeis. 



At Stations 4650 and 4660 and Stations 4709, 4720, a large Salpa species 

 and Doliolum constituted nearly the whole of the catch. 



