MUSEUM OF COMPARATIVE ZOOLOGY. 



55 



Bottom- 

 living 

 species. 



Residue, 8i.86 per cent, chocolate color, consists of Minerals [50.00], m. di. 

 0.1 mm., quartz, pumice fragments, magnetite, hornblende, tourmaline, glaucoiiite, 

 mica, many glassy fragments. Siliceous organisms [3 GO], Radiolariaus and 

 Sponge spicules. Fine washings [31.86], argillaceous matter, fine mineral par- 

 ticles, and a few fragments of siliceous spicules. 



Specimen 23, Litie DD— Lat. 22° 00' N. Long. 92° 13' W. 22 May, 1877. 

 Depth, 353 fathoms. A Uglit greenish gray fine calcareous mud, coherent. 



Carbonate of Calcium, 67.81 per cent, consists of Echinoderm fragments, 

 Pteropod, Ostracode, Gasteropod, and Lamellibranch shells, and the following 

 Foraminifera : — 



Globigerina rubra 



G. dubia 



G. conglobata 



G. infata 



G. bulloides, var. triloba 



Pullenia obliquiloculata 



Puhinulina menardii 



P. canariensis 



Miliolina seminulum 



M. sp. 



Bulimina margin-ata 

 B. aculeata 

 Bolivina nobilis 

 B. (snariensis 

 Truneatulina lobatula 

 Uvigeri/ia pi/gmcea 

 Nodosaria hispida 

 Textularia conica 

 T. sp. 



Residue, 32.19 per cent, consists of Minerals [3.00], m. di. 0.05 mm., quartz, 

 felspar, hornblende, magnetite, glauconite, glassy fragments, and a few red 

 particles. Siliceous organisms [10.00], Geodia and other Sponge spicules, 

 Diatoms and Radiolariaus. Fine washings [19.19], argillaceous matter, fine 

 mineral particles, and fragments of siliceous organisms. 



Specimen 51, Line P' . —Lat. 25° OS' 15" N. Long. 87° 12' 50" W. 14 May, 

 1875. Depth, 2119 fathoms. A brown Globigerina ooze, shghtly coherent. 



Carbonate of Calcium, 41.86 percent, consists of a few coccoliths and rhab- 

 doliths, Ostracode valves, Echinoderm fragments, and the iollowing Forami- 

 nifera : — 



