MUSEUM OF COMPARATIVE ZOOLOGY. 41 
Polyzoa and coccoliths. All the tropical species of pelagic Forami- 
nifera are abundant in these deposits, while they are relatively rare in 
the deposits along the coast to the north of Cape Hatteras. 
The remains of siliceous organisms, such as Diatoms, Radiolarians, 
- Sponge spicules, and glauconitic casts of Foraminifera and other organ- 
isms, make up usually 10 or 12 per cent of the deposit. 
The finer washings of these deposits are of a greenish color, which 
seems to be chiefly due to the presence of some organic substance, the 
nature of which has not yet been determined. A similar greenish mat- 
ter was met with by the “Challenger” in deposits from the same depths 
off the coasts of Africa, Australia, Japan, and China. 
Phosphate of lime and manganese concretions are present in all the 
deposits, and one remarkable concretion of these substances is described 
in detail from Station 317, in a depth of 333 fathoms, immediately 
under the waters of the Gulf Stream. 
Many of these deposits might equally well be called Globigerina oozes. 
Station 314. — Lat. 32° 24’ N. Long. 78° 44’ W. Depth, 142 fathoms. 
Surf. temp. 81°. Bot. temp. 563°. A greenish gray sand, granular, very slightly 
coherent. 
Carbonate of Calcium, 47.64 per cent, consists of shells of Gasteropods, Lamel- 
libranchs, Pteropods, and Ostracodes, fragments of Echinoderms, coccoliths, and 
the following pelagic and other Foraminifera : — 
Biloculina ringens, few. 
Planispirina celata, few. 
Globigerina bulloides, common. Miliolina agglutinans, rare. 
G. dubia, common. M. seminulum, rare. 
G. inflata, common. M, venusta, common. 
G. rubra, common. . Verneuilina triquetra ? rave. 
G. conglobata, few. Textularia conica, few. 
G, sacculifera, few. Bulimina marginata, few. 
G. (Orbulina) universa, few. \ Pelagic Nodosaria communis, rare. Bottom- 
Spheroidina dehiscens, few. species. Cristellaria cultrata, common. living 
Pulvinulina menardii, common. C. rotulata, rare. species. 
P. menardii, var. tumida, com- C. obtusata, rare. 
mon. C. calcar, rare. 
P. micheliniana, few. C. sp. few. 
Pullenia obliquiloculata, com- Uvigerina pygmea, few. 
mon. Truncatulina lobatula, few. 
Pulvinulina elegans, rare. 
Rotalia sp. 
Nonionina umbilicatula, rare. 
