

FORAMINIFEEA OP THE "WEST OF SCOTLAND. 251 



1S5. Lagena quadrata (Williamson). 



Entosolenia marginata, var. quadrata, Williamson, 1858, RFGB. p. 11, pi. i. figs. 27, 28. 



Lagena quadrata, Brady, 1884, FC. p. 475, pi. lis. figs. 3, 10, pi. lx. fig. 5. 

 9 Stations. 



Sparingly distributed. Two distinct types occur, generally together — an oblong form 

 similar to Williamson's original figure, and a shorter type which more decidedly deserves 

 the specific name, the specimens being practically square in plan. 



186. Lagena malcomsonii, Wright. 



Lagena laevigata, var. malcomsonii, Wright, 1910-11, BCNT. p. 4, pi. i. figs. 1, 2. 



Lagena malcomsonii, Heron-Allen & Earland, 1913, CI. p. 84, pi. vi fig. 9. 

 7 Stations. 



Very few records, and very rare at those Stns. The best single specimen at Stn. 10, 

 the other specimens being very short. 



187. Lagena marginata (Walker & Boys). (Plate 41. fig. 26.) 



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



Lagena marginata, Brady, 1884, FC. p. 476, pi. lix. figs. 21-23. 

 20 Stations. 



Almost universally distributed, most abundant at Stn. 3. There is a considerahle range 

 in the development of the keel, from keel-less specimens comparable with Silvestri's 

 Fissurina schlichti (S. 1902, LMT. p. 142, figs. 9-11) up to quite broad-keeled individuals, 

 though these are comparatively rare. At Stn. 12, where the keel-less individuals pre- 

 dominate, and at Stn. 20 nearly all had the aperture on one side of the oral extremity, 

 as in F. schlichti. At Stn. 11, two trigonal individuals were found, but no normal 

 specimens, and at Stn. 3 a broad-keeled shell, which we figure, in which the posterior 

 half of the keel was broken up into a fimbriate frill. 



188. Lagena marginata, var. insequilateralis, Wright. 



Lagena marginata, var. inasquilateralis, Wright, 1886, BLP. p. 321, pi. xxvi. fig. 10. 

 „ „ Heron-Allen & Earland, 1913, CI. p. 85. 



4 Stations. 



Very rare, and the few individuals found show marked variation in the very distinctive 

 aperture which distinguishes this variety. In Wright's figure the aperture is situated 

 inside a little hood on the flat, or less convex, side of the test, but the 'Buna' specimens 

 also furnish instances of a similar aperture on the convex side of the test and also a 

 specimen without a hood, in which the aperture is normal. 



189. Lagena marginata, var. semimarginata, Bcuss. (New to Britain.) 



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



figs. 4-6, 10-12. 

 Brady, 1884, FC. p. 477, pi. lix. figs. 17-19. 

 1 Station. 



A single specimen, rather small, which, unfortunately, has since been lost. 



