LAGENIDAE 109 



201. Lagena auriculata, Brady (F 245). 

 Two stations: WS 63, 521. 



Only a single specimen at each station, quite typical. 



202. Lagena biancae (Seguenza) (F 210). 



Twenty-two stations: 15, 17, 27, 123, 126, 136, 144, 145, 149; WS 25, 27, 33, 37, 42, 43, 47, 48, 

 418, 429, 521, 522; MS 68. 



Probably the most common species of Lagena round South Georgia, though never so 

 abundant as in some of the Falkland gatherings, or presenting such a range of variation. 

 Most abundant and varied at WS 27 and 33, where fine and typical specimens were 

 found, also the strongly punctate form. Neither of these, however, were so abundant 

 here or elsewhere as a small rather globose form which is the commonest variety at most 

 stations and is frequently the sole representative of the species. The type was found at 

 Sts. 27, 126, 136, 144, WS 27, 33 and 418. At WS 429 and 521, single specimens of a 

 very elongate fissurine variety were found. 



203. Lagena bicarinata (Terquem) (F 236). 

 Three stations: WS 25, 33, 373. 



Extremely rare; a single specimen only at each station, the best being at WS 373. 



204. Lagena bisulcata, Heron-Allen and Earland (F 239). 



Six stations: 136; WS 25, 27, 33, 357, 418. 



Good and typical specimens were not infrequent at the few stations at which the 

 species was observed, except at WS 27 and 33, where it was very rare. They are all of a 

 coarse, thick-walled form except at WS 27, where the single specimen was small and 

 weak. The species was most abundant and most strongly developed at WS 357. 



205. Lagena catenulata, Reuss (F 201). 



Five stations: WS 27, 33, 42, 521, 522. 



Rare. With the exception of very strongly marked specimens at WS 521 and 522, 

 all the specimens are far from typical, the cross-bars being almost absent over much of 

 the basal half of the test. They are thus intermediate between L. catemilata and L. 

 sqiiamoso-sulcata, Heron-Allen and Earland (No. 244). 



206. Lagena clathrata, Brady (F 243). 



One station : WS 429. 



A single specimen from WS 429 is probably referable to Brady's species, though very 

 unlike the usual types. It is elongate, broadest near the base, which is furnished with a 

 supplementary tubular aperture. Of the three marginal keels, the mid-keel is less 

 prominent than the outer two, except in the oral region where it extends beyond them. 

 The faces of the shell are finely striate. 



