MUSEUM OF COMPARATIVE ZOOLOGY. 107 



Distichopora sulcata, n. sp. ; Heliopora ? tubulata, n. sp. ; Heliopora ? carinata, 

 n. sp. ; Isis? (base of stem) ; Sarcodyction rugosinn, n. sp. 



Hydroids : Thoa pulchella, n. sp. ; Tubularia crinis, n. sp. Foraminifera • 

 Lagena striata Mont., rare; Nodosaria pyrula D'O., rare; Dentalina com- 

 munis D'O., rare; D. (agglulinans ?) ; Lingulina carinata D'O.; Texlularia 

 trocJius D'O., common, very large, also abundant in shoaler water; 7'. agglu- 

 linans D'O., rare; Nonionina scapha, rare ; Nonionina umbilicatula Montg., 

 rare ; Cristellaria crepidula F. and M., rather common ; Orbiculina adunca 

 D'O., rare and only in a worn state, its proper habitat is in the littoral zone ; 

 Amphistegina gibbosa D'O., rare and only young specimens ; it is very common 

 throughout the Gulf of Mexico in deep water; Globigerina rubra D'O., very 

 abundant, also in the Orbulina form; Gl. Dutertrei D'O., common ; P 

 obliquiloculata P. and J., rather common; Pullenia coarctata, n. sp., rather 

 common; Sphozroidina dehisce?is P. and J., not common; Rotalina cidtrata 

 D'O., very common; Rot. truncatulinoides D'O., common; Rot. Poeyi !)'(>., 

 rather common; Rotalina, 2 other species in single and imperfect specimens ; 

 Biloculina, sp. ; Triloculina Brongniardana D'O., rare; Quinqueloculina bicos- 

 tata D'O., rare. 



Many of the specimens of Foraminifera are filled with a yellow mass, 

 like the first stage of transformation into greensand, but the process 

 seems to stop here. 



Of Sponges quite a number were obtained, at least a dozen species, 

 which have not yet been determined. Some of the detached spicules 

 are remarkable for their size ; one, for instance, of the slender rectan- 

 gulated sexradiate type of Bowerbank measuring more than half an 

 inch. 



The vegetable kingdom was represented in this dredging by a -ingle 

 specimen of a minute alga, Centroceras clavulatum Agardh., which 

 Harvey says is found abundantly at low water mark at Key West. 

 In its branchlets was entangled a chain of a species of Biddidpkia. 

 Other Diatomes are rather scarce and have not yet been determined. 

 We therefore find here also a confirmation of the remark made in 

 European seas, that vegetable life does not extend to depths as great 

 as are reached by animals, and that therefore the greater number of 

 deep-sea animals must be carnivorous. 



The dredge contained also a number of nodules of a verv porous 

 limestone, similar in color and texture to the limestone forming the 

 range of low hills along the shore of Cuba, but composed apparently 

 of the remains of the same animals which were found living. Thus 



