FORAMINIFEKA OF THE WEST OF SCOTLAND. 253 



195. Lagena rizzae (Seguenza). 



Fissurina rizza, Seguenza, 1862, FMMM. p. 72, pi, ii. fig. 50. 

 Lagena rizza, Heron-Allen & Earlaud, 1913, CI. p. 89, pi. vii. fig. 9. 



4 Stations. 



Several good and typical specimens at Stn. 4 and a few at Stn. 12. 



196. Lagena bicarinata (Terquem). 



Fissurina bicarinata, Terquem, 1882, FEP. p. 31, pi. i. (ix.) fig. 24. 



Lagena bicarinata, Balkvvill & Millett, 1884, FG. p. 82, pi. ii. fig. 4, pi. iii. fig. 9. 



6 Stations. 



Scantily represented, only an occasional specimen at each Stn. The best at Stn. 20. 



197. Lagena orbignyana (Seguenza). 



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

 Lagena orbignyana, Brady, 1884, FC. p. 484, pi. lix. figs. 1, 18, 24-26. 



23 Stations. 



Universally distributed. This is by far the most, abundant Lagena in British dredgings, 

 and occurs plentifully at most Stns., notably at Stns. 3, 10, and 12. There is great 

 variety in the development of the middle keel, the tests being exceptionally broad-keeled 

 at Stn. 3. Two forms varying in the convexity of the test are especially noticeable — 

 a biconvex type, which is the commonest, and a fiat-faced type, occurring principally at 

 Stns. 3 and 10. This flat variety appears to be subject to more abundant keel-growth 

 than the convex form. Many trigonal specimens at Stn. 10 and a few at Stn. 12. At 

 Stns. 10, 14, and 19 many specimens with strongly punctate surface, suggesting a 

 passage-form into L. lacunata. 



198. Lagena orbignyana, var. walleriana, Wright. 



Lagena orbignyana, var. walleriana, Wright, 1886, SWI. p. 611; and 1891, SWI. p. 481, pi. ii. 



fig. 8. 

 Millett, 1898, etc., FM. 1901, p. 627, pi. xiv. fig. 19. 



1 Station. 



One typical specimen. Previously only recorded as British by Wright (itt supra). 



199. Lagena pulchella, Brady. 



Lagena pulchella, Brady, 1870, FTR. p. 294, pi. xii. fig. 1, a, b. 



Balkwill & Wright, 1885, DIS. p. 342, pi. xii. fig. 19. 



7 Stations. 



The original diagnosis of this species is confusing. Brady described it as having 

 " characters as in L. marginata, W. & J., to which it is closely allied, but differing in 

 having a number of delicate parallel costse springing from the base and extending into 

 the upper half of the shell, in some specimens nearly to the aperture," but gives no 

 figure [Brady, Brit. Assoc. 1866 (Hebrides, 1867), p. 70]. Later (ut supra) he repeats this 



SECOND SERIES. — ZOOLOGY, VOL. XI. 39 





