REPORT ON THE FORAMINIFERA. 
163 
Miliolina pygmcea, Reuss, sp. (PI. CXIII. fig. 16, a. b.). 
Quinquelocidina pygmcea, Reuss, 1850, Denkschr. d. k. Akad. Wien, vol. i. p. 384, pi. 1. fig. 3, a. b. 
„ lucida, Karrer, 1868, Sitzungsb. cl. k. Ak. Wiss. Wien, vol. lvii. p. 147, pi. ii. fig. 7. 
There is great difficulty in selecting a trivial name, out of the multitude that present 
themselves, for any varietal form of Miliolci not endowed with surface ornament to assist 
in its identification. I think, however, I cannot he wrong in assigning to Quinquelocidina 
pygmcea, Reuss, a number of specimens characterised by long, narrow, distinct, and sub- 
cylindrical segments. The thicker specimens sometimes have more than five chambers 
visible externally, whilst the smaller ones betray a tendency to grow thin and almost 
Spiroloculine. Many of the recent shells closely resemble Dr. Karrer s Quinquelocidina 
lucida , and furnish connecting links, both in point of size and morphological' features, 
between the drawings of that form and Prof. Reuss’ s type. 
I have found Miliolina pygmcea at ten of the Challenger Stations, of which seven arc 
amongst the island groups of the Southern Pacific, and of the western coast of South 
America, the remaining three being— south of Japan, Hong Kong Harbour, and Vigo 
Bay, respectively ; but it is a small inconspicuous organism that may have been over- 
looked in other localities. Though occasionally found in shallow water, it affects some- 
what greater depths than most of the Miliolince , and one-half of the localities are set down 
at more than 170 fathoms, the deepest being 580 fathoms. 
The memoirs of Reuss and Karrer above referred to give the species a place amongst 
Miocene Rhizopoda. 
Miliolina amygdaloides, n. sp. (PI. VI. fig. 10, a.b.). 
Test compressed, elongate-oval with tapering ends ; one face nearly flat, the other 
convex and subangular ; periphery sharp. Surface smooth, no external constrictions 
marking the margins of the chambers. Segments numerous, long and narrow ; aperture 
circular, produced. Shell-wall thin and opalescent. Length, g^th inch (O' 5 mm.) or less. 
This is a minute species but very uniform in its adult characters. The shell is 
exceedingly neatly made, but owing to the flush sutures the segmentation is always 
obscure. I know of no previously described form with which the specimens can properly 
be associated , the Quinquelocidina pygmcea of Reuss is perhaps the nearest, but the 
rounded chambers, excavated sutures, and generally larger size sufficiently distinguish 
that from the present species. 
The distribution, so far as apparent from the Challenger material, is confined to 
bottoms of moderate depth in the neighbourhood of some of the islands of the Pacific, 
such as the Hyalonema ground, south of Japan, 345 fathoms ; off the Ki Islands, 580 
fathoms ; and at a couple of Stations amongst the islands on the west coast of Patagonia, 
565 fathoms and 147 fathoms respectively. 
