go DISCOVERY REPORTS 



but in view of the fact that this name is preoccupied by Reuss (1851) for a different 

 organism, and the enormous amount of variation in this species, I have not separated 

 the forms. 



All the specimens at St. 417 are large, as also was a single specimen of the broad- 

 keeled form found at St. 418. Small specimens of the same form are frequent at St. 421. 



Pearcey: 417, 447 "rare". 



165. Lagena orbignyana var. walleriana, J. Wright (Plate I, figs. 56-59). 



Lagena orbignyana var. walleriana, J. Wright, 1886, LB, p. 611; 1891, SWI, p. 481, pi. xx, 



figs. 8 a, b. 



L. orbignyana var. walleriana, Sidebottom, 1912, etc., LSP, 1912, p. 417, pi. xix, fig. 21 ; 1913, 



P- 195; 

 One station: 417. 



A small form, frequent at St. 417, resembles Wright's variety except in one important 

 particular. The carinae are not continuous but in the basal area are traversed by bars, 

 up to four in number, which separate the intercarinal spaces into rectangular pits. There 

 are generally six of such pits occupying the basal margin of the shell, the central pits 

 being larger in such cases, but sometimes there are only three cross-bars giving four pits. 

 It was not seen at any other station, and I have not met with the form before. 



This subvariety is very interesting, but the distinctive feature of Wright's variety, the 

 central solid umbo of shell substance, is so strongly marked, that I have not thought it 

 worth further distinction. 



166. Lagena palliolata, Earland (A 377). 

 One station : 447. 



A single specimen. The type was from deep water in the Drake Strait. 



167. Lagena quadrilatera, Earland (A 381). 

 Two stations: 417, 421. 



A single typical specimen at each station. The only previous records are in the Ross 

 Sea and in Drake Strait, so this extension of range is of great interest. 



168. Lagena rizzae (Seguenza) (F 235). 

 One station: 421. 



A single specimen. 



169. Lagena schlichti (A. Silvestri) (F 225) (SG 241) (A 386). 

 Three stations: 417, 418, 421. 



Common at St. 417, some of the specimens being large ; rare, or very rare, and smaller 

 at the remaining stations. 



170. Lagena seguenziana, Fornasini (A 388). 

 One station: 417. 



A single typical specimen. 



