GOES: FORAMINIFERA. 29 
R. armatus, n. 
Plate I. Fig. 1. 
The growth of the test is nearly the same as that of R. distans, but the seg- 
ments are provided with 3-6 more or less produced spines or tubes; sometimes 
it seems as if some one of those tubes were in connection with side chambers, so 
that a construction somewhat like a Ramulina is originated. Shell wall thin, 
light brown, built up by finest sand and sponge spicules, often partly covered 
with white dust; the surface is often sparingly prickly by sponge needles. 
The scarcity of the supply has not allowed a closer examination and analysis of 
this peculiar form. 
Pacific. 1879 fathoms; one sample only. 
Caribbean Sea. 463 fathoms; very scarce. 
R. turbo, n. 
Plate I. Figs. 2, 3. 
Chambers conical trochiform, marginated, the margin on one side somewhat 
erenulated, the necks slender. One-chambered specimens only open at their 
two ends have been met with; test thin, firmly constructed of finest sand ; 
surface nearly smooth. 
Caribbean Sea. 347-420 fathoms; scarce. 
HAPLOPHRAGMIUM. 
H. latidorsatum Bornem. 
Nonionina latidorsata BoRNEM., 1855, Septarienthon Hermsdorf, Zeitschr. deut. geol. 
Gesellsch., VII. p. 339, Pl. XVI. Fig. 4. 
Lituolina irregularis var. Gois, 1882, Ret. Rhizop. Carib. Sea, Sv. Vet. Ak. Hdl., 
XIX. 4, p. 139, Pl. XII. Figs. 419, 420. 
H.. latidorsatum Br., 1884, Challeng. Rep., IX. p. 307, Pl. XXXIV. Figs. 7-10, 14. 
H. latidorsatum Gos, 1891, Arct. & Scand. Foramf., Sv. Vet. Ak. Hdl., XXV. 9, 
p. 21, Pl. V. Figs. 102-120. 
Usually both sides are without umbilicus, but sometimes provided with 
narrow ones. The number of segments is generally 4 or 5, in large specimens 
increasing to 7. The aperture is extremely narrow, and sometimes substituted 
by a row of pores. In many instances the surface is comparatively smooth, 
It seems to attain a greater development on the western side of the Isthmus. 
Pacific. 660-1879 fathoms; not scarce, particularly at 600-700 fathoms. 
Caribbean Sea. 196-1425 fathoms; not scarce. 
