708 
THE VOYAGE OF H.M.S. CHALLENGER. 
The Rotalia tuberosa of Karrer, which appears to be identical with the present species, 
was obtained from the Miocene formations of Lower Austria. 
Rotalia papillosa, n. sp. (Pi. CYI. fig. 9, a.b.c.),. 
Test subglobular, slightly compressed ; both faces highly convex, periphery obtuse 
and rounded ; composed of three or four convolutions, the last of which has twelve to 
fourteen segments. Sutures limbate ; marked externally either by interrupted raised 
lines, or more frequently by single or double rows of exogenous beads. Umbilical hollow 
filled with clear shell-substance, the exterior of which is granulated or irregularly fissured. 
Aperture an arched cleft at the inner margin of the inferior face of the final segment, 
near the periphery. Diameter, ^-th inch (l'27 mm.). 
A thick, rounded modification, closely allied to Rotalia schroeteriana, but of inferior 
development, both in respect of size and minute structure. 
It was obtained, at seven Challenger Stations in the South Pacific and at one in the 
North Pacific, as follows : — Port Jackson, Australia, 2 to 10 fathoms ; Torres Strait, 3 to 11 
fathoms; two points amongst the islands south of Papua, 25 to 29 fathoms; Humboldt 
Bay, Papua, 17 fathoms ; Nar.es Harbour, Admiralty Islands, 37 fathoms ; off Amboyna, 15 
to 20 fathoms ; and Hong Kong Harbour, 7 fathoms. 
Rotalia papillosa , var. compressiuscula, , nov.. (PL CVIL fig. 1, a.b.c.; young, 
PI. CYIII. fig. I, a.b.c.). 
General characters similar to those of Rotalia papillosa, but the test much more 
compressed and the periphery sharply, angular. Diameter, ^§dh inch (l mm.). 
This variety is rather smaller than the more typical form, and the contour of the test 
is lenticular instead of nearly globular; the segmentation also and the disposition of the 
surface-ornament are generally more distinct and regular. 
Rotalia papillosa, var. compressiuscula has been observed in dredged sands from 
eight Pacific Stations, namely r — Port Jackson, Sydney, 6 fathoms ; three points on the 
southern coast of Papua, 25 to 29 fathoms; Humboldt Bay, Papua, 17 fathoms; off 
Amboyna, 15 to 20 fathoms ; off the Philippines, 95 fathoms ; and the Inland Sea, Japan, 
14 fathoms. At five of. these localities it occurs in company with the typical Rotalia 
papillosa. 
Rotalia venusta, n. sp. (PL CYIII. fig. 2, a.b.c.). 
Test compressed, sublenticular ; superior face only slightly convex, often nearly flat, 
inferior convex ; margin obtuse or rounded, more or less constricted at the sutures; com- 
posed of two convolutions or rather more, of which the later has about eight segments ; 
