422 DISCOVERY REPORTS 



Kluge gave a full and accurate description of this species. The branches bear a 

 marginal series of more or less spindle-shaped kenozooecia (Fig. 36 A), lying along the 

 lateral walls of the marginal zooecia and connected with them by a series of rosette- 

 plates which may be prominent as in the figured specimen. The kenozooecia have the 

 effect of filling in the angles between the marginal zooecia which overlap them so that 

 they are rarely visible in frontal view. The kenozooecia bear spinous processes like those 

 on the basal surface of the ordinary zooecia. 



Fig. 36 A shows part of the edge of a branch in basal view. The kenozooecium 

 (stippled) lies along the lateral wall of the proximal part (pr.) of a marginal zooecium. 

 The lateral wall of the erect distal part of this zooecium (er.) is to be seen beyond the 

 the distal end of the kenozooecium and the avicularium belonging to the same zooecium 

 is visible beyond the kenozooecium marginally. The distal and proximal ends of the 

 neighbouring zooecia in the longitudinal series are also visible. 



2. Klugella buski nom.n. Fig. 36 C. 



Flustra crassa Busk, 1884, p. 53, pi. xvi, figs. 6, 6 a, b (not F. crassa Desmarest and Lesueur, 

 1814, p. 53); Waters, 1896, pp. 281 et seq., pi. i, fig. 22, pi. ii, fig. 5. 



Station distribution. Not represented in the Discovery collections. 



Geographical distribution. Kerguelen (Busk). 



Holotype. Challenger St. 149 D, Kerguelen, 87 . 12 . 9 . 252 A, the holotype of Flustra crassa Busk. 



The name Flustra crassa being preoccupied by F. crassa Desmarest and Lesueur 

 I propose the trivial name buski for Busk's species which, as explained above, I propose 

 to include in Klugella. 



As shown by Waters (1896, pi. ii, fig. 5), and in my Fig. 36 C, the avicularium is columnar 

 and attached by a broad base, and has a spout-like beak. Some, but not all, zooecia have 

 the short conical spines on the distal corners, noticed by Busk, and some have in addition 

 a pair of longer spines, placed one on each side, just proximal to the distal spine, and 

 arching over the opesia. The hyperstomial ovicell is longer than wide, with a mem- 

 branous ectooecium and a calcareous entooecium bearing reticulate sculpture remi- 

 niscent of that of Camptoplites retiformis. As already mentioned, the angles between the 

 marginal zooecia are filled by more or less spindle-shaped kenozooecia. 



Himantozoum Harmer, 1923 



1. Himantozoum antarcticum (Calvet). Fig. 37 B. 



Flustra antarctica Calvet, 1909, p. 11, pi. i, figs. 4-6; Livingstone, 1928, p. 22, pi. iii, fig. 9 

 (references). 



Station distribution. Antarctic: Weddell Quadrant, Sts. 20, 27, 42, 45, 144, 164, 175, 190, 363, 

 456, 474, 1872, 1873, 1961, WS 27, WS 33, WS 42, WS 177; Victoria Quadrant, Sts. 1652, 1658, 

 1660. 



Geographical distribution. South Georgia (Discovery; Shackleton-Rowett Expedition); 

 Bouvet Island; South Sandwich Islands; South Orkney Islands; near Elephant Island (Discovery); 

 South Shetland Islands (Discovery; 20.12.11.1, from 200 fm. on whale harpoon); Palmer Archi- 

 pelago (Discovery; Calvet); Adelie Land (Livingstone); Wilhelm II Land (Kluge); Oates Land 

 (Terra Nova); Ross Sea (Terra Nova; Discovery). 



