REPORT ON THE FOR AMINIFERA . 
181 
There are but few external marks that afford any clue to the internal structure of the 
shell of this species. The segments are few in number, and, so far as can be made out, 
are arranged on a Triloculine or sometimes on a Biloeuline plan. The general 
appearance of the test is that of a little oval ball of coarse sand, with a short narrow 
tubular neck at one end. 
I find that the term “ incrassata ” which was assigned to the species when first 
described had been previously employed by Dr. Karrer for another member of the 
genus, and a slight change of name has therefore been made. 
Miliolina crassatina is exceedingly rare. It has only been met with in a single 
dredging, off East Moncoeur Island, Bass Strait, 38 fathoms, where it occurs in company 
with Miliolina triquetra, and a large assortment of non- arenaceous Miliolce. 
Miliolina triquetra, H. B. Brady (PL VIII. figs. 8-10). 
Miliolina triquetra, Brady, 1879, Quart. Journ. Micr. Sci., vol. xix., N. S., p 54. 
Test free, compressed, sub-triangular ; earlier segments combined more or less 
regularly in the Quinqueloculine manner, later ones spreading ; the final convolution 
composed of three segments arranged in one plane. Aperture simple, toothed ; situate 
in the produced neck-like extension of the terminal chamber. Texture roughly 
arenaceous externally. Diameter, ij^th inch (DO mm.). 
Miliolina triquetra may be accepted as a sort of dimorphous modification of the 
“ agglutinans ” type, the early growth being Milioline, the later convolutions becoming 
planospiral, and having commonly three segments instead of two in each whorl. The 
drawings in PL VIII., and particularly that of the horizontal section fig. 10, sufficiently 
explain the general structure of the test. 
It is a somewhat rare species, only noticed hitherto at three Challenger Stations, 
namely: — Bass Strait, 38 fathoms; Torres Strait, 155 fathoms; and Humboldt Bay, 
Papua, 37 fathoms. 
Miliolina alveoliniformis, H. B. Brady (Pl. VIII. figs. 15-20). 
Miliolina alveoliniformis, Brady, 1879, Quart. Journ. Micr. Sci., ■vol. xix., N. S., 54. 
Test free, elongate, fusiform ; composed of narrow tubular chambers, arranged 
lengthwise, more or less spirally around the long axis. Segments numerous, sometimes 
seven or eight visible on the exterior ; subcylindrical, arcuate. Aperture porous or 
radiate, obscure, terminal. Texture thin, porcellanous, and nearly smooth in very young- 
shells ; becoming distinctly arenaceous externally in adult specimens. Length, r ^th inch 
(2 ‘5 mm.) or more. 
(ZOOL. CHALL. EXP. — PAP.T XXII. — 1883.) 
Y 24 
