BY E. J. GODDARD AND H. I. JENSEN. 295 



Cristellaria variabilis Reuss, var. allomorphinoides, var.nov. 

 (Plate vi.fig.2). 



This is a minute hyaline shell, the last chamber of which 

 envelops the earlier chambers and is shaped like Lagena orhi- 

 giiyana^ but has a cristellarian aperture. The enclosed earlier 

 chambers have an arrangement which reminds one of that of the 

 internal chambers of Allomorjihina trigonula, but they open into 

 one another by cristellarian necks. In section the^hell is rather 

 flattened. Size: length 0-35, breadth 0-25 mm. 



Note. — The figure represents the shell seen by transmitted 

 light. 



Remarks. — About 20 % of this material is made up of foramin- 

 ifera, the remaining portion consisting of sand, shell-fragments, 

 one or two species of ostracod shells, polyzoa, and spicules of 

 sponges, echinoderms and alcyonarian corals. A few pteropod 

 shells are also present. 



The members of the family Miliolidse are not well represented 

 in numbers, and are uniformly diminutive in size. This is to be 

 attributed to the fact that the material was dredged in muddy 

 and very shallow water, whereas members of the family thrive 

 best in clear water at a depth of from 50 to 150 fathoms. The 

 great amount of fresh water brought down by rivers to the Gulf 

 also brings about conditions unfavourable to the perfect develop- 

 ment of the Miliolida?. 



Members of the family Textulariidee are extremely abundant 

 as regards numbers of individuals, but are limited to compara- 

 tively few species and those of a small size. The forms present 

 are such as are not restricted to great depths, and, like Textularia 

 gramen and Bolivina costata, usually found in shallow waters. 

 Yet all these species belong to deeper water than they were found 

 in. To this and to the abundance of brackish water we ma}^ 

 attribute the minuteness of the forms obtained. 



The Globigerinida? are extremely abundant. This is very 

 remarkable, as this family is pelagic, and properly speaking, 

 belongs to deeper waters. The species represented are, however, 

 all micromorphs. 



