LITUOLIDAE 93 



South Georgian material, but appears to be confined to tlie Antarctic area and will be 

 dealt with in our report on the same. A figure of M. arenacea is given for comparison 

 (Plate V, fig. 6). 



It may be mentioned here that the range of M. oblonga is now known to extend beyond 

 the ice-area. It occurs in material from St. 6 off Tristan d'Acunha (80-140 m.) and 

 from WS 4 off South-west Africa (40 m.). 



150. Miliammina obliqua, Heron-Allen and Earland (Plate V, figs. 9-14). 



Miliammina obliqua, Heron-Allen and Earland, 1929, etc., FSA, 1930, p. 42, pi. i, figs. 7-12. 



Forty-six stations: 14, 15, 20, 23, 27, 28, 30, 31, 41, 42, 45, 123, 126, 129, 131, 140, 143, 144, 148, 

 149, 660; WS 25, 28, 32, 33, 37, 40, 41, 42, 43, 45, 46, 47, 48, 52, 63, 63-4, 113, 154, 348, 349, 

 357, 418; Drygalski Fjord; MS 14, 68. 



Test quinqueloculine, with tubular chambers broader at the aboral ends, the early 

 chambers lying transversely across the centre of the test. Sutural lines depressed and 

 peripheral edge rounded. Aperture crescentiform, usually flush with the terminal end 

 of the test, sometimes on a slightly produced neck with collar, furnished with a minute 

 simple tooth. Walls thin and smooth, sometimes polished, embodying the fine mineral 

 grains which appear to be somewhat larger than in M, oblonga. Colour varying from 

 nearly white to dark grey, occasionally brownish. Size variable, but never attaining the 

 proportions of M. oblonga. Average length o-30-o-35 mm., breadth o-i5-o-i8 mm., 

 thickness o-i2 mm. 



This little form, which frequently, but not invariably, occurs in company with M. 

 oblonga, differs from that species mainly in the transverse disposition of the central 

 chambers. It may be considered to be isomorphous with Miliolina bosciana (d'Orbigny), 

 and occupies the same position with regard to Miliammina oblonga, as Miliolina bosciana 

 does to Miliolina oblonga (Montagu). Its distribution is probably co-extensive with that 

 of Miliammina oblonga, as it was found in the Terra Nova material and at Kerguelen. 



M. obliqua is practically co-extensive in its distribution in the South Georgia area with 

 M. oblonga, but it is nowhere quite so common, and there are stations at which one or 

 other species appears exclusively, though as a rule the best specimens of each are found 

 at the same stations, notably St. 126, WS 28 and 154. 



151. Miliammina lata, Heron-Allen and Earland (Plate HI, fig. 17 and Plate V, figs. 

 15-19)- 

 Miliammina lata, Heron-Allen and Earland, 1929, etc., FSA, 1930, p. 43, pi. i, figs. 13-17. 



Nineteen stations : 13, 14, 16, 31, 126, 131, 136, 145; WS 28, 32, 33, 37, 40, 42, 50, 51, 52, 348; 

 MS 68. 



Test quinqueloculine, but frequently with very little exposure of the earlier chambers, 

 so little, in fact, that to a casual inspection the test appears triloculine. Chambers 

 inflated, broadening at the aboral end, broadly rounded at the periphery. Sutural lines 

 flush or only slightly depressed. Aperture rather small, crescentiform, with slightly 

 reverted collar, situated on the end of the terminal chamber (never on a produced neck), 

 furnished with a simple tooth. Wall rather thick, smooth, rarely polished, containing 



