192 BULLETIN OF THE 



ceous Foraminifer, forming immense curling sheets attached by one 

 edge to stones or sunk into the mud. This Foraminifer seems to in- 

 crease in size by forming irregular more or less concentric crescent- 

 shaped rings. When it comes to the surface, it is of a dark olive-gi'een 

 color. 



During this second cruise we continued our experiments with the 

 Tanner closing tow-net, in order to determine the lower limits of the 

 surface pelagic fauna, and to determine also if there is any so called in- 

 termediate pelagic fauna at other depths, or within a short distance 

 from tlie bottom. 



On the 25th of March, at a point not quite half way between Cape 

 San Francisco and the Galapagos, in 1,832 fathoms of water, the Tanner 

 net was sent down to tow at a depth which varied from 1,739 to 1,773 

 fathoms. The net was towed within these limits for a period of some- 

 thing over twenty rniuutes. The messenger was then sent down to close 

 the net ; time occupied seven minutes. The net was then drawn up to 

 the surface. The lower part of it was found to have closed perfectly, 

 and contained nothing beyond a few fragments of leaves. The lower 

 bag was carefully washed in water which had been strained, and the 

 water examined with all possible care, and sifted again. It contained 

 nothing. The upper part of the net, however, which had remained 

 open on its way up, was found to contain the identical surface things 

 which on former occasions we had found in the Tanner net down to a 

 depth of 200 fathoms. They were a small species of Sagitta, and species 

 of Doliolum, Appendicularia, a huge Sagitta, a large number of Leucifer 

 and Sergestes, and several species of S^hizopods and Copepods ; two spe- 

 cies of Hyperia, probably parasitic on a Salpa, which was also quite abun- 

 dant ; several finely colored Calanus, some Isopods, and a number of 

 fragments of what must have been a very large Beroe, measuring from 

 five to six inches in diameter ; Leptocephalus, several specimens of Sto- 

 mias, of Scopelus, of Melaraphfes, and other species, many of which, like 

 some of the Schizopods, had been considered as typical deep-sea forms. 

 Among the so called deep-sea Medusae, several specimens of Atolla and 

 Periphylla were also found in the open part of the net. I may mention 

 also as of special interest a huge Ostracod, allied to Crossophorus, with a 

 thin semi-transparent carapace, and measuring somewhat more than one 

 inch in length. The largest Ostracod previously known is not more 

 than one third of an inch long. On two other occasions this same 

 Ostracod was brought up in the tow-net from a depth of less than 

 200 fathoms. 



