NO. 5 FORAMINIFERA FROM TRINIDAD—SAUNDERS 15 
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3, Edge view of hypotype (U.S.N.M. No. P5100) showing a single 
oval areal aperture surrounded by a prominent lip. This type of 
aperture is shown by Cushman and Bronnimann (1948a) in their 
illustration of Labrospira salsa. 4, Edge view of hypotype (U.S.N.M. 
No. P5101) showing a slitlike areal aperture surrounded by a promi- 
nent lip. 5, Edge view of hypotype (U.S.N.M. No. P5102) showing 
two circular areal apertures. 6, Edge view of hypotype (U.S.N.M. 
No. P5103) showing three circular areal apertures in a transverse 
line across the chamber. 7a, Side view of hypotype (U.S.N.M. 
No. P5104). 7b, Edge view showing three circular areal apertures. 
8, Edge view of hypotype (U.S.N.M. No. P5105) showing a partly 
constricted slitlike areal aperture and two irregular-shaped areal 
/ apertures. The specimens in figures 3-8 show the range of apertural 
| pattern to be found in the adult stage of this species. All from 
| Ortoire River, Trinidad. X 100. 
|| PLATE 2 
i LITUOLIDAE 
| Fig. 1. Haplophragmoides wilbertt Andersen............-cccecccceeceecs 3 
Ia, Side view of hypotype (U.S.N.M. No. P5114). 1b. Edge view. 
‘| This specimen is typical for the species, which shows only very slight 
|| variation in Trinidad. From Ortoire River, Trinidad. X 75. 
| Figs. 2-8. Trochamminita irregularis Cushman and Bronnimann emend. 
/ PPAR CEE ee one eatns bee. «0s see hie eal sia sae anos raed hed wares eh ae 4 
2a, Side view of hypotype (U.S.N.M. No. P5093) ; a regular planispiral 
| form. 2b, Edge view showing two circular areal apertures in the 
| last chamber surrounded by prominent lips. 3, Edge view of hypotype 
I} (U.S.N.M. No. P5095) showing specimen that is planispirally coiled 
| except for the last chamber. 4, Side view of hypotype (U.S.N.M. 
No. P5004) showing planispiral early portion with irregularly coiled 
later chamber. 5, View of hypotype (U.S.N.M. No. P5096) showing 
| a much more irregular test with four areal apertures present in the 
final chamber. 6, View of hypotype (U.S.N.M. No. P5007) showing 
small planispiral early portion followed by irregularly arranged 
chambers. 7, View of hypotype (U.S.N.M. No. P5008) showing a 
very irregular arrangement of chambers with four areal apertures 
in the last chamber. 8a-c, Three views of hypotype (U.S.N.M. No. 
Ps099) showing a very irregular arrangement of visible chambers 
with six areal apertures in the last chamber. All specimens from 
Maracas Bay River, Trinidad. Figs. 2-4, 112; figs. 5-8, < 83. 
| PLATE 3 
TROCHAM MINIDAE 
Figs. 1, 2. Siphotrochammina lobata Saunders, new genus, new species.. 9 
1a, Dorsal view of paratype (U.S.N.M. No. P5108). 1b, Ventral view. 
Ic, Edge view showing aperture of penultimate chamber visible within 
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a 
