PLATE IV 



Figs. 1-7. Ammocibicides proteus, gen. et sp.n. (No. 209). Figs, i, 2, 4 x 75 ; 3, 

 5-7 > 45. To illustrate the variable forms. Fig. i is regularly spiral. 

 Figs. 2, 3, spiral assuming biserial arrangement. Figs. 4-6, spiral becoming 

 entirely irregular. Fig. 7, spiral aborted. 



Figs. 8-12. Ammocibicides pontoni, sp.n. (No. 210). x 75. Figs. 8, 9, dorsal views of 

 spiral form. Fig. 10, edge view of same. Fig. 11, spiral assuming uniserial 

 arrangement, dorsal view. Fig. 12, edge-oral view of same. 



Figs. 13-16. Spirolocammina tenuis, gen. et sp.n. (No. 215). x 75. Fig. 13, side view 

 as a transparent object. Figs. 14, 15, side views, opaque. Fig. 16, edge view. 



Figs. 17-19. Cystammina argentea, sp.n. (No. 207). x 75. Fig. 17, side view of a 

 specimen viewed as a transparent object. Fig. 18, side view, as an opaque 

 object. Fig. 19, top view. 



Figs. 20-24. Miliammina arenacea (Chapman) (No. 216). x 45. Fig. 20, front view 

 of coarsely arenaceous type from South Sandwich Islands. Fig. 21, oral end 

 view, normal type. Fig. 22, front view. Fig. 23, back view. Fig. 24, 

 edge-oral view, all normal type. 



Figs. 25-29. Miliammina circularis, Heron-Allen and Earland (No. 220). x 45. Fig. 25, 

 back view. Fig. 26, front view. Fig. 27, oral-end view. Fig. 28, edge 

 view. Fig. 29, section. 



Figs. 30-32. Spiroplectammina filifonnis, sp.n. (No. 224). x 70. Fig. 30, side view. 

 Fig. 31, edge view (back). Fig. 32, side view as a transparent object. 



I^ig®' 33~3S- Spiroplectammina subcylindrica, sp.n. (No. 222)- x 80. Fig. 33, side view. 

 Fig. 34, edge view (front). Fig. 35, side view as a transparent object. 



Figs. 36-38. Spiroplectella cylindroides , gen. et sp.n. (No. 225). x 70. Figs. 36, 37, 

 side views, opaque. Fig. 38, side view as a transparent object. 



Figs. 39-43. Textularia antarctica (Wiesner) (No. 232). x 75. Fig. 39, microspheric 

 specimen, side view, transparent. Fig. 40, the same, megalospheric. 

 Fig. 41, side view, opaque megalospheric. Fig. 42, the same, microspheric. 

 Fig. 43, edge-oral view. 



Figs. 44-47. Textularia caiewa/a, Cushman (No. 228). x 70. Fig. 44, side view, normal. 

 Figs. 45, 46, side views, the later chambers showing a bigenerine tendency. 

 Fig. 45, edge-oral view. 



Fig. 48. Bigenerina minutissima, Earland (No. 233). x 65. 



