54 



BULLETIN OF THE 



Carbonate of Calcium, 47.87 per cent, consists of coccoliths, rhabdolitlis, and 

 the folio wiuof Foramiiiifcra : — 



Globlgerina codglohala 



G. but laid es 



G. bulloides, var. triloba 



G. sacculifera 



G. cequilateralis 



G. rubra 



G. dubia 



G. {Orbulina) universa 



Candeina nitlda 

 Pullenia obliquiloculata 

 PulcinuUna menardii 

 P. menardii, var. tumida 

 P. canariensis 

 P. elegans 



Truncatulina lobatula 

 Nonioniiia umbilicatula 



Residue, 52.13 per cent, reddish brown, consists of Minerals [20.00], m. di. 

 0.05 mm., quartz, mica, felspar, hornblende, magnetite, palagonite, glauconite. 

 Siliceous organisms [5.00], Sponge spicules, glauconitic or other casts. Fine 

 washings [27.13], amorphous clayey matter, with fine mineral particles and frag- 

 ments of siliceous spicules. 



Specimen 4, Line P. — Lat. 26° 40' N. Long. 96" 01' W. 29 January, 1877. 

 Depth, 4S9 fathoms. A brown mud, coherent, plastic. This deposit resembles 

 very much a fine river clay, mixed with a very few pelagic Foraminifera ; it would 

 seem, judging from its position, to be derived from the fine detrital matter carried 

 down by the rivers. 



Carbonate of Calcium, 2.76 per cent, consists of one or two coccoliths along 

 with the following Foraminifera : — 



Globlgerina bulloides 

 G. dubia 

 G. rubra 

 G conglobata 

 Pullenia obliquiloculata 

 PulcinuUna menardii 

 P. menardii, var. tumida 

 P. micheliniana 



Pelagic 

 species. 



Biloculina ringens 

 Ammodiscus charoides 

 BoUvina a^nariensis 

 Bulimina rostrata 

 B. oculata 

 Nodosaria raphanus 

 Ucigerina asperula 

 U. asperula, var. aiiberiana 

 Spharoidina bulloides 

 Truncatulina lobatula 



Bottom- 

 living 

 species. 



PulcinuUna elegans 



Residue, 97.24 per cent, of a light slaty-brown color, consists of Minerals 

 [25.00], m. di. 0.01 mm., quartz, magnetite, mica, felspars, augite, hornblende, 

 and several small red particles. Siliceous organisms [1.00], siliceous spicules and 

 fragments of Radiolarians. Fine washings [71.24], amorphous clayey matter. 



Specimen 21, Line BE. — Lat. 20° 59' N. Long. 96° 39' W. 25 May, 1877. 

 Depth, 511 fathoms. Volcanic mud, very coherent, clayey. 



Carbonate of Calcium, 15.14 per cent, consists of Echinoderm fragments, fish 

 teeth, and Foraminifera as follows : — 



