io8 DISCOVERY REPORTS 



Widely distributed, but less frequent than L. biancae, into which it merges imper- 

 ceptibly, presenting similar variations in the degree of compression and length of test. 

 The spinous base is very poorly developed every^vhere, except at WS 521, where it is 

 prominent. At this station and at WS 154 the species is most favourably represented. 

 At most stations the specimens are small, few in number and very near L. biancae, the 

 basal process being more or less rudimentary. 



197. Lagena acuticosta, Reuss (F 196) (Plate III, fig. 52). 



Six stations: 27, 33, 123; WS 27, 33, 418. 



Usually only a single typical specimen at each station. At St. 33 a very fine example 

 of a double shell was found. The individuals, which are large, are as usual fixed apex to 

 base. 



198. Lagena alveolata, var. substriata, Brady. 



Lagena auriciilata var. substriata, Brady, 1879, etc., RRC, 1881, p. 61. 



Lagena alveolata var. substriata, Brady, 1884, FC, p. 488, pi. Ix, fig. 34. 



Lagena alveolata var. substriata, Cushman, 1910, etc., FNP, 1913, p. 34, pi. xviii, fig. 5. 



One station: WS 522. 



A single good specimen. 



199. Lagena annectens. Burrows and Holland (F 215). 

 Seven stations: 30, 144, 149; WS 27, 33, 50; MS 14. 



Never very common, usually very feeble specimens, the best at St. 149 and WS 33. 



200. Lagena apiculata (Reuss) (F 174) (Plate IV, figs. 1-3). 



Twenty-three stations: 13, 42, 45, 131, 660; WS 32, 33, 37, 40, 42, 43, 46, 47, 48, 50, 52, 63, 113, 

 154. 314. 349. 357. 522. 



This is one of the most widely distributed species in the South Georgian material, and 

 though never common, some stations yielded many specimens, which often exhibited 

 variety of form. The average specimen is of a small regular type, but the aperture is 

 variable. Usually radial and central, the aperture is sometimes radial but excentric, 

 sometimes fissurine, and at WS 349 fissurine and hooded. 



A very large form compared with the others occurs at many stations. It is character- 

 ized by a long, regularly tapering shell ranging up to 0-7 mm. in length, broadest towards 

 the base which is furnished either with a small circular pit or a short projecting tube. 

 The pit or tube may be pierced so as to form a secondary aperture but is usually closed. 

 The aperture is prominent and radial. This form is the sole representative of the species 

 at Sts. 42, 131, 660, WS 43, 46, 48, 50, 52, 154 and 357. At some other stations it is 

 accompanied by other varieties. At St. 131, WS 42, 46 and 50, a few specimens had 

 basal striae radiating from the tube. I was at first inclined to assign the specimens to 

 L. stelligera, but on the whole the evidence points to L. apiculata. 



