374 DISCOVERY REPORTS 



212. Lagena fasciata (Egger). 



Oolina fasciata, Egger, 1857, MSO, p. 270, pi. i (v), figs. 12-15. 

 Lagena fasciata, Millett, 1898, etc., FM, 1901, p. 495, pi. viii, fig. 19. 



Six stations: 48; WS 80, 83, 90, 92, 93. 



Occurs very infrequently as compared with the feebler type L. amiectetis, but 

 occasional good and typical individuals were found, the best being at WS 80 and 90. 



213. Lagena fasciata var. faba, Balkwill and Millett. 



Lagfjia faba, Balkwill and Millett, 1884, FG, p. Si, pi. ii, fig. 10. 



Lagena faba var. fasciata, Balkwill, and Millett, 1908, FG (reprint), p. 6, pi. ii, fig. 10. 



Lagena faba var . fasciata , Heron-Allen and Earland, 1913, CI, p. 84. 



Two stations: WS 71, 83. 



A single specimen at each station. 



214. Lagena lucida (Williamson). 



Entosolenia margiiiata var. lucida, Williamson, 1858, RFGB, p. 10, pi. i, figs. 22, 23. 

 Lagena lucida, Sidebottom, 1904, etc., RFD, 1906, p. 6, pi. i, figs. 9-12. 



Five stations: 48; WS 83, 87, 248, 408. 



Only a few specimens at each station, but absolutely typical. 



215. Lagena annectens, Burrows and Holland (Plate X, figs. 40-44). 



Lagena annectens. Burrows and Holland, in Jones, Parker and Brady, 1866, etc., MFC, 1895, 



p. 203, pi. vii, fig. II. 



Lagena annectens, Heron-Allen and Earland, 1914, etc., FKA, 1915, p. 662. 



Lagena annectens, Fornasini, 1901, NNI, p. 50, text-fig. 4. 



Thirteen stations: 388; WS 71, 83, 87, 88, 89, 91, 93, 97, 215, 217, 248, 408. 



Moderately frequent. This is the most abundant species of a little group, the members 

 of which are zoologically inseparable though they have been differentiated according to 

 the varying prominence or strength of the crescentiform surface markings. They would 

 perhaps have all been described under the senior specific name L. fasciata, Egger, but 

 typical specimens of that species are comparatively infrequent in the Falkland material. 



The specimens referable to L. annectens are themselves subject to considerable varia- 

 tion. Apiculate forms are comparatively common, and the worthlessness of this feature as 

 a specific, or even varietal difference, is illustrated by our specimens, which vary from 

 a mere basal thickening to a strongly produced spine (Plate X, fig. 43). Doubly apiculate 

 specimens are by no means infrequent. At many stations, notably WS 71, 87 and 93, 

 many of the specimens are ornamented with opaque spots in the glassy central portion 

 of the shell. These appear to be lacunae, but whether natural or due to some parasitic 

 growth we cannot say. There is great difference in the inflation of the shell ; in some the 

 specimens are very thin with parallel faces, some are so inflated as to be semi-globular. 



The size varies greatly, averaging up to 0-40 mm. in length, 0-25 mm. in breadth. 



