376 DISCOVERY REPORTS 



flat wing, furnished at the extremities with sharp hooks, which do not extend backwards 

 beyond the wing. Aperture fissurine, with a short entosolenian tube. 



Length, 0-17 mm. Greatest breadth, at hooks, 0-14 mm. 



A single specimen. This very distinctive form bears a striking resemblance to No. 262, 

 Lingidina falcata, a new species from the Falkland Islands, and was at first regarded as 

 an immature stage of that species. But such can hardly be the case, as the hooks in 

 Liugulina falcata are confined to the second chamber and would not appear on the first 

 chamber, unless we are to suppose that they are formed and then resorbed. 



Its nearest ally in the genus Lagena would be L. falcata. Chaster (C. 1892, S, p. 61, 

 pi. i, fig. 7), which species, however, is characterized by a thick and solid neck, furnished 

 with recurved hooks. The body of that species is also much less compressed. 



221. Lagena marginata (Walker and Boys). 



Serpula {Lagena) marginata. Walker and Boys, 1784, TMR, p. 2, pi. i, fig. 7. 

 Lagena marginata, Brady, 1884, FC, p. 476, pi. lix, figs. 21-3. 



Twenty-three stations: 48, 51, 236, 388; WS 71, 77, 80, 83, 84, 86, 87, 88, 89, 90, 91, 92, 93, 97, 

 99. 215, 245, 248, 408. 



Often very abundant, the best at WS 88, at which station there was a considerable 

 range in the width of the marginal carina. As a general rule the carinae of the Falkland 

 area specimens are very poorly developed, often no more than a mere indication. At 

 WS 71, 88, 91, 92, a few specimens occur with coarse punctations scattered irregularly 

 over the test in addition to the ordinary fine punctation ; this gives a spotted appearance 

 to the test. A similar characteristic was noted in connection with L. laevigata (No. 210). 



222. Lagena marginata var. semimarginata, Reuss. 



Lagena marginata var. semimarginata, Reuss, 1870, FSP, p. 468; Schlicht, 1870, FSP, p. 11, 

 pi. iv, figs. 4-6, 10-12. 



Lagefia marginata var. semimarginata, Brady, 1884, FC, p. 477, pi. lix, figs. 17-19. 

 Lagena marginata var. semimarginata, Millett, 1898, etc., FM, 1901, p. 619, pi. xiv, fig. i. 



Two stations: WS 210, 217. 



Some very good specimens at these stations. It is probably widely distributed, but 

 has escaped attention owing to its similarity to some of the local variations of L. laevi- 

 gata. 



223. Lagena unguis, Heron-Allen and Earland. 



Lagena unguis, Heron-Allen and Earland, 1913, CI, p. 86, pi. vii, figs. 1-3 ; 1913, FNS, p. 135 ; 



1916, FSC, p. 46. 



Lagena unguis, Cushman, 1918, etc., FAO, 1923, p. 60, pi. xi, fig. 7. 



Two stations: WS 88, 92. 



Several good specimens at WS 88 and one at WS 92. 



