4 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 134 
Diameter 0.32 mm., thickness 0.16 mm. 
Locality—Figured hypotype (U.S.N.M. No. P5114) from sample 
Bo. 262, Ortoire River, east coast of Trinidad, B.W.I. 
Distribution—Haplophragmoides wilberti lives in large numbers 
in all the swamps and in the brackish sections of the rivers in 
Trinidad. 
Remarks.—Specimens from Trinidad resemble very closely those 
described by Andersen (1953) from the Louisiana coast, although 
Andersen’s holotype is larger than the average size for Trinidad 
material. 
Genus TROCHAMMINITA Cushman and Bronnimann emend. Saunders 
Type species—Trochamminita irregularis Cushman and Bronni- 
mann emend. Saunders. 
Emended diagnosis.—Test planispiral throughout or planispiral in 
the early stage with adult chambers added very irregularly. Wall 
arenaceous. Aperture in planispiral tests either a single areal open- 
ing or multiple areal openings on the terminal face of the final cham- 
ber ; where adult chambers are irregularly added, multiple apertures 
are usual, their position being very variable. All apertures are sur- 
rounded by prominent lips. 
Remarks——Emendation of the type species necessitates these 
changes in the generic definition, including the removal of Trocham- 
minita from the Trochamminidae to the Lituolidae. 
The type species, Trochamminita irregularis Cushman and Bronni- 
mann emend. Saunders, shows all transitions of test form from wholly 
planispiral to almost completely irregular. A second species, Tvo- 
chamminita salsa (Cushman and Bronnimann) emend. Saunders, is 
included in the genus. In this species only planispiral forms are devel- 
oped though some tests show a slight tendency toward irregular 
growth. The taxonomic position of Trochamminita salsa is discussed 
in the remarks on that species (p. 7). 
TROCHAMMINITA IRREGULARIS Cushman and Bronnimann 
emend. Saunders 
PLATE 2, FIGURES 2-8 
Trochammimta irregularis CUSHMAN and BRoNNIMANN, Contr. Cushman Lab. 
Foram. Res., vol. 24, pt. I, p. 17, pl. 4, figs. 1-3, 1948. 
Emended diagnosis—Shape of test: All intermediate stages found 
between forms that are planispiral throughout and those that have a 
planispiral or slightly irregularly planispiral early portion followed by 
