TROCHAMMININAE 345 



108. Trochammina inflata (Montagu). 



Nautilus inflatus, Montagu, 1803-8, TB, Suppl. p. 81, pi. xviii, fig. 3. 

 Trochammina inflata, Brady, 1884, FC, p. 338, pi. xli, fig. 4. 



Three stations: WS 83, 246, 409. 



A single specimen at each station, none of them quite typical. 



109. Trochammina malovensis, Heron-Allen and Earland (Plate XVII, figs. 14-19). 



Trochammina malovensis, Heron-Allen and Earland, 1929, etc., FSA, 1929, p. 328, pi. iv, figs. 

 27-32. 



Thirteen stations: 48, 51; WS 71, 76, 77, 80, 83, 88, 92, 93, 99, 108, 225. 



Test free, minute, arenaceous, consisting of numerous chambers arranged in a 

 trochoid spiral of four or five coils. About five chambers in each convolution, neatly 

 constructed of fine sand and sponge spicules with more or less ferruginous cement, the 

 colour of the whole test varying accordingly from white to brown. Sutures flush in early 

 stages, but rather deeply depressed in the last convolution, owing to the rapid inflation 

 of the chambers, which results in a lobulate periphery to the shell. All chambers visible 

 on the superior face, only those of the last convolution on the inferior side, which is 

 deeply excavated in the centre. Aperture a loop-like slit on the inner edge of the final 

 chamber. 



Dimensions: diameter, o-i6-o-25 mm.; height, 0-12 mm. 



This pretty little species belongs to the iuflata group. Its nearest allies are probably 

 T. rotaliformis, ]. Wright, a common British species, from which it differs in the greater 

 height of the spire and in the number of chambers, and T. pacifica, Cushman, a very 

 similar but much larger and more coarsely constructed form from British Columbia. It 

 is one of the most characteristic of the Falkland Islands Foraminifera, occurring with 

 more or less frequency at thirteen stations, the best specimens being found at 48 (105 m.) 

 and WS 88 (118 m.). It is named after the Falkland Islands, the " lies Malouines" of 

 d'Orbigny's Voyage dam VAmeriqiie Meridiotiale. It occurs also, and even more fre- 

 quently, in the South Georgia area. 



no. Trochammina nana (Brady). 



Haplophragmiiim nanum, Brady, 1879, etc., RRC, 18S1, p. 50; 1881, HNPE, p. 99, pi. ii, figs. 



I a~c; 1884, FC, p. 311, pi. xxxv, figs. 6-8. 



Trochammina nana, Cushman, 1918, etc., FAO, 1920, p. 80, pi. xvii, fig. i. 



One station: 48. 



A few specimens, including one sessile individual. 



no A. Trochammina globigeriniformis (Parker and Jones). 



Lituola nautiloidea var. globigeriniformis, Parker and Jones, 1865, NAAF, p. 407, pi. xv, figs. 

 46, 47; pi. xvii, figs. 96-8. 



Haplophragmium globigeriniforme, Brady, 1884, FC, p. 312, pi. xxxv, figs. 10, 11. 

 Trocha?nmina globigeriniformis, Cushman, 1910, etc., FNP, 1910, p. 124, figs. 193-5. 



One station: WS 433. 



Very rare but quite typical. 



