476 DISCOVERY REPORTS 



Station distribution. Sub- Antarctic : South Atlantic Ocean, Sts. 222, 1902, WS 95, WS 847. 

 Victoria: St. 1686. 



Geographical distribution. South-west and west of Great Britain; Ireland; France; Norway; 

 ? Sweden; Adriatic; Patagonian Shelf; Magellanic Region; Amsterdam Island, Indian Ocean; 

 Australia; Tasmania; New Zealand; California; Galapagos Islands. 



The sources of the recorded distribution are given by Hastings. Eight ancestrulae 

 were taken at St. WS 847, near the Patagonian coast, on 2 September 1932. 



Brettia Dyster, 1858 



1. Brettia inornata (Goldstein). 



Alysidium inornata (sic) Goldstein, 1882, p. 42, pi. i, fig. 1. 

 Catenaria attenuata Busk, 1884, p. 14, pi. ii, figs. 1, \a. 



Station distribution. Not represented in the Discovery collections. 



Geographical distribution. Marion Island (Goldstein) ; Heard Island (Busk). 



Busk's figure gives a false impression of a semicircular orifice. Actually his specimens 

 show a short, oval, membranous opesia, as in Goldstein's figure, and I have no doubt of 

 the synonymy of the two forms. The shading of the opesia in Goldstein's figure, leaving 

 a central clear oval, is curious, but one zooecium in Busk's dry mounts had a similar 

 appearance. On mounting this zooecium as a transparency it was seen that the appear- 

 ance is due to an accumulation of detritus round the edges of the frontal membrane. 



In general appearance this species suggests Brettia, and, as it shows all the features of 

 the genotype as enumerated by Harmer (1926, p. 198), I propose to place it in that genus 

 for the present (see p. 477). 



The zooecia are uniserial and may give rise to a single median distal zooecium or to 

 two asymmetrically placed zooecia one of which is nearly but not quite median and the 

 other more lateral. In both these arrangements the parent zooecium is very little wider 

 distally and has no " shoulders ". In a third arrangement the zooecium has a suggestion 

 of shoulders, like those of B. triplex, but each shoulder carries a symmetrically placed 

 lateral distal zooecium and there is nothing in the median distal position. 



There is an ancestrula on Busk's slide 99.7. 1 .3653. It is rather short but does not 

 otherwise differ from the other zooecia in shape. It is separated by a constriction from 

 the small disk by which it is attached to a foraminiferan. 



2. Brettia triplex sp.n. Fig. 56 D. 



Station distribution. Not represented in the Discovery collections. 

 Geographical distribution. Oates Land (Terra Nova, St. TN 194). 

 Holotype. St. TN 194. 



Description. Zoarium uniserial, bifurcating, each zooecium giving rise to two 

 asymmetrically placed distal zooecia, one median or very nearly so, the other lateral to it. 



Zooecia elongate 1-3 mm. long, expanded distally, one shoulder giving rise to the 

 lateral distal zooecium, the other carrying an avicularium (Fig. 56 D). A small proximal 

 segment separated by a deep constriction. 



