LAGENINAE 381 



however, differs from our species by the fact that the grooves are interrupted by a stout 

 basal spine. No basal obstacle is present in the Falkland forms. Cushman also figures 

 (C. 1910, etc., FNP, 1913, p. 33, pi. xviii, fig. 2) a very similar form which he regards as 

 a variety of L. alveolata, Brady and calls " var. plebeia". The figure is not very clear and 

 we have not been able to see the types. If, however, it is allied to L. alveolata it should 

 not have continuous grooves round the base. 



240. Lagena orbignyana (Seguenza). 



Fissurina orbignyana, Seguenza, 1862, FMMM, p. 66, pi. ii, figs. 25, 26. 

 Lagena orbignyana, Brady, Parker and Jones, 1888, AB, p. 222, pi. xliv, fig. 20. 

 Lagena orbignyana. Chapman, 1914, FORS, p. 66, pi. iv, fig. 29. 



Six stations: 51 ; WS 83, 84, 88, 217, 221. 



Singularly rare and usually small and weak. Excellent specimens however at WS 217. 



241. Lagena orbignyana var. bifida, Heron-Allen and Earland. 



Lagena orbignyana var. bifida, Heron-Allen and Earland, 1924, FGM, p. 152, pi. ix, figs. 46-50. 

 Two stations : 388 ; WS 92. 



A single specimen at each station referable to this variety. They differ from the 

 Australian fossils only in being perfectly circular, instead of being oval, in plan. 



242. Lagena pulchella, Brady (Plate XI, figs. 33, 34). 



Lagena pulchella, Brady, 1866, Rep. Brit. Ass. (1867), p. 70. 



Lagena pulchella, Brady, 1870, FTR, p. 294, pi. xii, fig. i a, b. 



Lagena pulchella, Balkvvill and Wright, 1885, DIS, p. 342, pi. xii, fig. 19. 



Eleven stations: WS 76, 80, 83, 92, 93, 97, 99, 210, 221, 225, 248. 



By contrast with the rarity of L. clathrata, the weakly developed L. pulchella is 

 comparatively common in the Falkland material. The difference lies in the irregular 

 distribution of the perpendicular costae, which in L. clathrata run in regular bars, 

 whilst in L. pulchella they start from the upper and lower marginal edges, are slightly 

 wavy, and often fade out to invisibility in the central area of the shell. The Falkland 

 specimens vary considerably in the strength of their markings and there is often a 

 tendency on the part of the costae to coalesce and form a reticulate marking linking it 

 with L. laureata, Heron-Allen and Earland (No. 2^^ post). 



Length, about 0-20 mm.; breadth, o-i8 mm. 



243. Lagena clathrata, Brady (Plate XI, figs. 35, 36). 



Lagena clathrata, Brady, 1884, EC, p. 485, pi. Ix, fig. 4. 



Lagena clathrata, Balkwill and Millett, 1884, EG, p. 82, pi, ii, fig. 14. 



Three stations: 388; WS 88, 245. 



An excellent specimen at WS 88, very strongly marked, and several similar specimens 



