4o6 DISCOVERY REPORTS 



324. Spirillina tuberculata, Brady. 



Spirillina tuberculata, Brady, 1879, etc., RRC, 1879, p. 279, pi. viii, fig. 28 (see also Siddall, 

 1878, FRD, p. 49) ; 1884, FC, p. 631, pi. Ixxxv, figs. 12-16. 



Spirillina tuberculata, Cushman, 1910, etc., FNP, 1915, p. 4, pi. i, figs. 7-9; pi. ii, fig. 3 ; Text- 

 figs. 3, 4. 



Three stations: WS 84, 87, 88. 



Large individuals, but few in number, at these stations, the best at WS 88. 



325. Spirillina limbata, Brady. 



Spirillina limbata, Brady, 1879, etc., RRC, 1879, p. 278, pi. viii, fig. 26; 1884, FC, p. 632, 



pi. Ixxxv, figs. 18-21. 



Spirillina limbata, Flint, 1899, RFA, p. 326, pi. Ixxi, fig. 5. 



Two stations : 388; WS88. 



Several very fine specimens. 



Sub-family ROTALIINAE 

 Genus Patellina, Williamson, 1858 



326. Patellina corrugata, Williamson (Plate XIII, figs. 19-22). 



Patellina corrugata, Williamson, 1858, RFGB, p. 46, pi. iii, figs. 86-9. 

 Patellina corrugata, Heron-Allen and Earland, 1913, CI, p. 109, pi. ix, fig. 11. 

 Patellina corrugata, Cushman, 1925, etc., LFR, vii, 1930, p. 15, pi. iii, fig. 5. 

 Patellina corrugata. Parr and ColHns, 1930, ANZF, p. 90, pi. iv, figs. 1-5. 



Nineteen stations: 48, 51, 53, 388; WS 71, 86, 87, 88, 89, 90, 92, 93, 99, 217, 221, 225, 245, 248, 

 408. 



Never very common. The Falkland type is very constant in its circular shape from 

 which there is little variation, except in the height of the shell. At many stations a direct 

 connection between the height and the size of the proloculum can be observed, the 

 microspheric stage being high, and the megalospheric low and depressed, sometimes 

 almost scale-like. This connection can be seen best at WS 88, where the species attains 

 its maximum development of size (up to o-8o mm. in diameter) and is most frequent. 

 The megalospheric proloculum is often prominent here, as a bead standing above the 

 contour of the test (fig. 22). The microspheric proloculum (fig. 21) is generally followed 

 by a greater length of unseptate tube than the megalospheric ; instances showing as much 

 as two to four distinct convolutions of unseptate tube have been observed. 



327. Patellina corrugata var. formosa, var.n. (Plate XIII, figs. 23-25). 

 Three stations: WS 88, 90, 92. 



A few specimens at each station, the best at WS 88. Test large, hyaline, nearly circular 

 in plan, rather depressed or scale-like, ventral side flat, dorsal side convex, becoming less 

 convex towards the margin. Following the proloculum which is large, and either 

 globular or reniform, is a simple flattened tube, about o-o8 mm. in diameter, wound in a 

 spreading spiral of about three convolutions, which occupy from about one-third to 



