Recent Foraminifera off the East Coast of Australia. 17 



Trochammina rohertsoni Brady. (PI. II, fig. 17.) 



Trochammina rohertsoni Brady, Journ. Roy. Micr. Soc, 1887, p. 893. 

 T. rohertsoni Wright, 1891, Proc. Roy. Irish Acad., (3) vol. i, No. 4, p. 469, 

 pi. XX, fig. 4. 



I think I am right in my diagnosis of this form. Two speci- 

 mens have five chambers showing in the outermost whorl, the rest 

 having four. The umbilical cavity is more closed in than is usual. 

 The tests are small, and not quite so highly polished or coloured as 

 the British specimens in my cabinet, except for a few chambers of 

 several of the tests. 



Trochammina rotaliformis Wright. 



Trochammina inflaia (Montagu), var. Balkwill and Wright, 1885, Trans. 



Roy. Irish Acad., vol. xxviii. (Science), p. 331, pi. xiii, figs. 11, 12. 

 T. rotaliformis Heron-Allen and Earland, 1913, Clare Island, Proc. Roy. 



Irish Acad., vol. xxxi, pt. Ixiv, p. 52, pi. iii, figs. 11-13. 



The tests are small and built of fine sand-grains. They agree 

 well with Balkwill and Wright's fig. 12 in the above reference. 

 One of the four is dark coloured ; the others are lighter, especially 

 as regards the final chambers. 



Trochammina ochracea (Williamson). 



Botalina ochracea Williamson, 1858, Rec. Foram. Gt. Britain, p. 55, pi. iv, 

 fig. 112; pi. V, fig. 113. 



Trochammina ochracea Millett, 1898, etc., Rept. Rec. Foram. Malay Archi- 

 pelago, 1899, p. 363, pi. V, fig. 12. 



A single example. The curving sutures on the under-surface 

 are well defined, and " present the only means of distinguishing 

 this species from the closely allied T. plicata of Terquem," as 

 Heron-Allen and Earland remark (Foram. Clare Island, Proc. Boy. 

 Irish Acad., 1913, p. 51). 



Another variety appears to be present, that referred to by 

 Heron-Allen and Earland, 1915, Foram. Kerimba Archipelago, 

 pt. ii, Trans. Zool. Soc, London, vol. xx, pt. xvii, p. 619, pi. xlvi, 

 figs. 27, 28 ; but the irregular chitinous carina is very much 

 wrinkled and covered with fine grey matter. Three examples 

 occur. 



Trochammina plicata (Terquem), var. (PL II, fig. 18.) 



Patellina plicata Terquem, 1876, Anim. Plage de Dunkerque, 2™' fasc. 



p. 72, pi. viii, fig. 9. 

 Trochammina plicata, 'RbX^^iW and Millett, 1884, Journ. Micr. Nat. Sci., 



vol. iii, p. 26, pi. i, fig. 8. 



In this variety the whole of the upper surface of the sliell is 

 covered with irregular, branching, and interrupted costse, closely 



March Wth, WIS c 



