FOSSIL FORAMINIFERA FROM THE WEST INDIES. 37 



uniform width throughout, initial end usually with several short, blunt, 

 conical spines extending backward, usually best developed at the angles and 

 near the proloculum. 

 Length up to 7 mm. 



Jones and Parker recorded 2 specimens in their early list, "one 

 elliptical, and another oval." In the material I have seen there are 

 several specimens showing considerable variation. The most common 

 form is that figured by Vanden Broeck as var. lanceolate and referred 

 to above. In the fossil specimens spinosity of the basal margin is 

 even more marked, in some cases as many as 3 short spines appearing 

 from the proloculum alone and occasionally in pairs one behind the 

 other in front view. These may appear at various parts of the basal 

 margin. Besides this common form there are a few specimens more 

 like Vanden Broeck's var. sagittula (e. c., plate 2, figs. 12, 14), and one 

 at least which closely resembles the form described by him as F. 

 complanata var. concinna (op. cit., plate 3, fig. 2). In general the series 

 is not unlike that of recent material from the Carribbean and Gulf of 

 Mexico. 



Cristellaria calcar (Linne) var. aspinosa, new variety. 

 (Plate 6, Figure 8.) 



The following is a description of this variety: 



Test small, close-coiled, biconvex, umbonate, smooth, sutures not depressed, 

 peripheral margin acute, with a distinct but very narrow carina with a very 

 slight knob-like spine opposite each chamber. 



Diameter about 0.75 mm. 



Type specimen from the Miocene Bowden marl, Jamaica (U. S. N. M. 

 No. 328177). 



This is very close to the typical form of C. calcar as figured (Cushman, 

 Bull. 71, U. S. Nat. Mus., part 3, plate 32, figure 4), but the spines in 

 the Bowden specimens are nearly obsolete. These are not broken 

 spines, but are really shortened and knob-like or almost wanting. It 

 is rare in the Bowden material. 



Cristellaria bowdenensis, new species. 

 (Plate 8, Figure 2.) 



The following is a description of this species: 



Test comparatively large, much compressed, chambers long and narrow, 

 broadening somewhat toward the periphery, sutures gently curved; peri- 

 pheral margin with a thin keel of medium width prolonged at irregular inter- 

 vals into a series of rowel-like spines, short, rounded near the base, and 

 apparently having little relation to the chambers; surface of the chambers 

 smooth, the sutures typically raised, limbate, with a series of tubercles run- 

 ning from the umbilical area to the periphery; aperture somewhat back from 

 the periphery in the last-formed chambers, really terminal in the young, and 

 early chambers peripheral, stellate. 



Diameter up to 4 mm. 



