NO. 5 FORAMINIFERA FROM TRINIDAD—-SAUNDERS 3 
texture. Color light brown to fawn. Chambers: Wedge shaped when 
viewed both equatorially and axially; 7 to 10 (usually 8) in the last 
whorl, increasing rapidly in size. Chamber shape tends to be irregu- 
lar in the last whorl of some specimens. The last chamber may become 
wider and flattened across the axial periphery with a terminal face 
that is flattened or even slightly concave (pl. 1, fig. 1). Sutures: 
Radial, slightly depressed in the umbilical area becoming more de- 
pressed toward the periphery. Aperture: An equatorial, interio- 
marginal, symmetrical, low-arched slit surmounted by a narrow, pro- 
jecting lip. Size of hypotype of figure 2: Maximum diameter 0.55 
mm., maximum thickness 0.28 mm. 
Locality—Figured hypotypes (U.S.N.M. Nos. P5092a, b) from 
sample J.S. 273, Carenage Swamp, west coast of Trinidad, B.W.1I. 
Distribution —Haplophragmoides manilaensis Andersen is more 
restricted in its distribution in Trinidad than is Haplophragmoides 
wilberti Andersen. It is uncommon in the river estuaries and in most 
of the swamps, though it occurs in great numbers in the Carenage 
Swamp on the west coast. Here it may be found in shallow drains 
cut through mangroves and water-logged coconut plantations. At low 
tide the mud is above water level. 
Remarks.—Trinidad representatives of this species resemble closely 
Andersen’s holotype described from Louisiana (Andersen, 1953). 
HAPLOPHRAGMOIDES WILBERTI Andersen 
PLATE 2, FIGURE I 
Haplophragmoides wilberti ANDERSEN, Contr. Cushman Found. Foram. Res., 
wol..4, pt. I, p. 21, pl. 4, fig. 7,. 1953: 
Diagnosis —Shape of test: Planispiral, involute, with a smooth or 
very slightly lobate equatorial periphery ; the small, deep umbilici may 
be closed by the chambers of the last whorl. Axial periphery sym- 
metrically rounded. Wall: Fine sand grains set in abundant cement ; 
surface smooth, polished. The sutural faces of the chambers are fre- 
quently of a somewhat coarser texture than the lateral walls. Color 
red-brown to light fawn. Chambers: Slightly inflated; wedge shaped 
in side view, with apices meeting around a small umbilicus or com- 
pletely closing it ; seven to nine chambers in the last whorl, increasing 
gradually in size. Terminal face of last chamber somewhat convex 
with a slight depression parallel to each lateral margin. Sutures: Dis- 
tinct, very slightly depressed, straight or faintly sigmoid. Aperture: 
An equatorial, interiomarginal, symmetrical, low-arched slit sur- 
mounted by a narrow but prominent lip. Size of figured hypotype: 
