392 Proceedings of Royal Society of Edinburgh. [sess. 
temperature 41 ‘l 0 F., surface temperature 64’2° F. Green mud 
(Murray and Renard). 
The central figure on Plate I. is that of a fine specimen of 
Textularia conica (fig. 1). The test is rather larger than usual, 
consisting of no less than twenty-five chambers ; the initial series 
being practically hyaline or sub-arenaceous in structure. This 
example is seen to he creeping along a smooth spicule of Hyalo- 
nema , with the granular sarcode completely covering the oral 
surface of the test. There is no sarcode emission, apparently, 
from the lateral surfaces of the test, and this would point to 
its imperforate character. From Station 232, S. of Japan, 
345 fathoms. 
Figs. 2 and 3 are typical specimens of Truncatulina lobatula> 
fig. 2 showing the superior, and fig. 3 the inferior surface of the 
shell. The protruded sarcode in these examples seems to form 
somewhat ragged extensions, which partially separate from the 
main mass surrounding the oral opening of the shell, and are pro- 
bably emitted from the tubules, forming by themselves a knotted 
reticulum. These specimens were found moving over the surfaces 
of various marine algae. Station 232, S. of Japan, 345 fathoms. 
The remaining figures, 4, 5, and 6, on this plate, are examples of 
the curiously variable and interesting s^zoiesAnomalinapolymorpha. 
In this form we have a remarkable instance of the adaptability of the 
foraminiferal shell to the surfaces over which the organism moves. 
This species presents two modifications, one with longish, round- 
ended spines, and the other, not so frequent, without processes. The 
latter form resembles Discorbina rugosa very closely, but is as a rule 
never so regularly shaped ; and it is, moreover, always associated 
with the spinous variety.* The specimens shown in figs. 4 and 5 
were found attached to marine algse, and, it will be remarked, 
are fairly regular in the coiling of the shell. The other specimen, 
shown in fig. 6, has adapted its shell to the form of the object of 
attachment, the spicule of Hyalonema ; and the coiled shell, besides 
being laterally elongated, is hollowed along the longer axis, on its 
inferior surface, so as to be more securely seated on the sponge- 
spicule. There is little doubt that these modifications of Anoma- 
See H. B. Brady’s remarks, Rep. Chall., vol. ix., 1884, p. 676. 
