FRELIMINAKY REPORT. 107 



than the jjehigic Foraminifera and Radiokria, did not present any pecu- 

 liar types; they were the usual pelagic types of the Pacific, such as: 

 Siphonophores, Copepods, Amphipods, Pteropods, Cephalopods, Salpaa, Dia- 

 toms, Pelagia, Sagitta, Ostracods, Pelagic Annelids, Tomopteris, Hyperids, 

 Sergestes, Euphausia, Lucifer, Atlanta, Appendicularia, Dolioluni, Cocco- 

 spheres, Rhabdospheres, Pulvinulina, Sergestes, Alciopa, Macrura, Scopelus, 

 CtenophorjB, Cyprinida, Phroniina, Stomatopods, lanthinn, fish eggs, young 

 fishes, Velella, Physalia, Ostracods, Macruran larvte, Schizopods, Doliolura. 

 This line is also characterized by the great number of Diatoms collected, 

 and at Station 298 Sir John Murray says that " on the whole there was 

 a great change in the general character of the surface fauna, pointing to 

 the nearness of a great continent similar to what was observed off Japan 

 and elsewhere." 



Tlie Bathymdrical Itanr/c of the Pdugic Fauna. 



With regard to the bathymetrical range of the so-called intermediate 

 fauna, the following notes are suggested by the records of the " Chal- 

 lenger" deep tow-net hauls in the Pacific. 



At several of the stations the open tow-nets were hauled at a depth 

 of 200 fathoms, and Challengerida3 and other Radiolariaus not found at 

 the surface were collected. It does not follow, because the tow-nets 

 attached to the trawl and the weights brought up similar organisms to 

 those obtained at 200 fathoms or more from the surface, that these types 

 are found living all the way from tlie surface to the bottom, different 

 .species recurring at sundry bathymetrical ranges. The open nets attached 

 to the trawl and weights contained, according to the lists given by Murray, 

 oidy such genera as were also collected by nets sent down to less than 250 

 fathoms from the surface, and were probtably caught by the trawl nets 

 while passing through the upper strata. The experience of Ilensen and 

 of Chun has been like that of the earlier expeditions of the "Albatross," 

 as well as the present one, that at the depth of 250 fathoms there is a 

 very marked decrease in the number of organisms collected as compared 

 with those living in a belt nearer the surface. It does not appear from 

 the data given Ijy Sir John Murray that there is any proof of the exist- 



