ASTRORHIZIDAE 57 



measuring 6-o mm. in extreme length, of which the fusiform body accounts for 4-0 mm. 

 and the extended necks for 2-0 mm. The maximum breadth is about 3-0 mm. 



The absence of the species from other stations is remarkable considering its frequency 

 in some of the South Georgia material. 



Genus Storthosphaera, F. E. Schulze, 1875 



59. Storthosphaera depressa, Pearcey (F 5'5). 

 Two stations: 167, 170. 



A single typical specimen at St. 167; rare but less typical at St. 170. 



60. Storthosphaera elongata, Cushman (SG 44). 

 Two stations: 170, 366. 



Good specimens were frequent at both stations. 



Genus Crithionina, Goes, 1894 



61. Crithionina granum. Goes (F 54) (SG 46). 

 Three stations: 170, 175, 180. 



Moderately frequent at Sts. 170, 180; very rare at St. 175. There is a certain varia- 

 bility in the construction at the different stations, very large sand grains and spicules 

 being intermingled with the usual fine sand at St. 170, finer sand grains and spicules 

 being used at St. 175, while at St. 180 hardly anything but the finest sand is employed. 



62. Crithionina mamilla, Goes (F 55) (SG 47). 

 Seven stations: 170, 175, 177, 180-2; WS 499. 



A few specimens only at most of the stations, but owing to the nature of the gatherings, 

 the species may be commoner than the comparative rarity of specimens would indicate. 

 Very fine spicular outgrowths on specimens at Sts. 177, 180, 181. 



63. Crithionina pisum. Goes (F 56) (SG 48). 



Nine stations: 164, 170, 177, 180, 181, 190, 196; WS 395, 495. 



Usually rare or very rare, but small specimens were frequent at St. WS 395 in the 

 Bransfield Strait. The size of the specimens and method of construction vary greatly, 

 but mud is the usual constituent. The best examples of mud-built specimens, some 

 very large, were found at Sts. 181, WS 495. Mud and sand grains formed the material 

 of a very large specimen at St. 177. Very fine white sand was used at St. 170. 



64. Crithionina pisum var. hispida, Flint (SG 49). 

 Two stations: 181 ; WS 482. 



Represented by a few good specimens at St. 181, and a single specimen at St. WS 482. 

 They are all small. 



Genus Dendronina, Heron-Allen and Earland, 1922 



65. Dendronina arborescens. Heron- Allen and Earland, var. antarctica, Heron-Allen 

 and Earland (Plate I, fig. 11). 



Dendroiiuia arborescens var. antarctica, Heron-Allen and Earland, 1922, TN, p. 80, pi. ii, figs. 13, 19 



Two stations: 177, 181. 



