56 DISCOVERY REPORTS 



constriction indicates septation, but it probably marks a stage of growth. The test is 

 constructed of very fine mud, neatly finished and devoid of larger incorporated particles. 



Length up to 6-o mm. ; breadth up to (about) o-8o mm. 



Frequent at MS 68, rare at the other stations, the best specimens at St. 45. In the 

 Antarctic gatherings it reaches far greater dimensions than in material from South 

 Georgia. Specimens have been found measuring up to 4 cm. in length. 



Genus Storthosphaera, F. E. Schulze, 1875 



44. Storthosphaera elongata, Cushman. 



Storthosphaera elongata, Cushman, 1918 etc., FAO, 1918, p. 40, pi. xviii, figs. 1,2; pi. xix, fig. i. 

 Two stations: 45, 144. 



At St. 144 a single specimen, agreeing exactly with Cushman's description and figure, 

 and with British specimens from West Scotland, 205-1600 m., and South-west 

 Ireland, 523-680 fathoms, where it is not uncommon. Cushman's types were from the 

 North Atlantic region about 40° 16' N, 67° W. 



At St. 45 a form is common, which I think is probably only a local form of S. 

 elongata. It is smaller, rarely more than half the usual dimensions, and very variable in 

 shape, ranging between sub-spherical, compressed, and cylindro-elongate, sometimes 

 four times as long as wide. The character of the test agrees with Cushman's description : 

 "wall comparatively thin, composed of a felted mass of fine amorphous material and a 

 large percentage of acerose sponge spicules with little or no cement; aperture not 

 developed, surface smooth, colour greyish-white". 



It would be difficult to separate the sub-spherical and compressed varieties from 

 Crithionina, but for the thin test and large central cavity, facts to which Cushman has 

 drawn attention. Nor would it seem possible to assign these varieties to the same species 

 as the very elongate forms but for the presence of a complete series of connecting links. 



45. Storthosphaera elongata var. impudica, var.n. (Plate I, figs. 23, 24). 

 Two stations: 45, 144. 



In general construction the test agrees with the type, the wall being thin and the 

 cavity large and entire. But at about half its length the test is sharply constricted and 

 continues growth in cylindrical form of about half the previous width. The entire 

 organism has a grotesque phallus shape. 



Length up to 2-4 mm. Breadth 1-2 mm. at broader, 0-7 mm. at narrower, extremity. 



Genus Crithionina, Goes, 1894 



46. Crithionina granum. Goes (F 54). 

 Two stations: 144; WS 33. 



Frequent but poorly developed at WS 33, large but rare at St. 144. 



