FORAMINIFERA OF THE WEST OP SCOTLAND. 209 



due to the breaking away of the shelly plate attached to the penultimate chamher which 

 normally restricts the aperture in this species. It is extremely abundant and attains a 

 very large size in the deep water of the Faroe Channel, from which locality Brady's is 

 the only previous British record. 



18. Miliolina circularis (Bornemann). 



Triloculina circularis, Bornemann, 3855, FSH. p. 349, pi. six. fig. 4. 



Miliolina circularis, Brady, 1884, FC. p. 169, pi. iv. fig. 3; pi. v. figs. 13, 14 (?). 



19 Stations. 



Almost universally distributed, often common, but not attaining any very large or 

 robust growth. The best specimens at Stns. 4, 12, 14, and 18. Wild-growing or 

 Nubecularine individuals, probably referable to this species, were found at Stns. 3 

 and 15. 



19. Miliolina labiosa (d'Orbigny). 



Triloculina labiosa, d'Orbigny, 1839, FC. p. 178, pi. x. figs. 12-14. 

 Miliolina labiosa, Brady, 1884, FC. p. 170, pi. vi. figs. 3-5. 



1 Station. 



One good specimen. 



20. Miliolina subrotunda (Montagu). 



Vermiculum subrotundum, Montagu, 1803-8, TB. pt. 2, p. 521. 

 Miliolina subrotunda, Brady, 1884, FC. p. 168, pi. v. figs. 10, 11. 



21 Stations. 



Almost universally distributed, often abundant, and as usual very variable in character. 

 At some of the Stns., especially Stns. 6, 7, 8, 11, and 15, the specimens are very large. 

 At Stns. 7, 12, and 15 they run wild, and at Stn. 12 this leads to the formation of 

 articuline forms, which also occur at Stn. 20. Similar articuline forms first attracted 

 the attention of Ehrenberg, who separated them under the name Ceratospirnlina sprattii 

 (Monatsb. K. Ak. Wiss. Berlin, 1858, p. 19, and Abb. K. Ak. Wiss. Berlin, 1872), and of 

 Seguenza, who named them Quinqueloculina tubulosa (S. 1862, RPC. p. 35, pi. ii. fig. 8). 

 Subsequently Silvestri figured such forms under Ehrenberg's name (Att. Pont. Ace. 

 Nuovi Lincei, Ann. 57, 1904, p. 139, fig. la-c). They are of fairly frequent occurrence 

 in dredgings in which the genus Miliolina is prominent. 



21. Miliolina seminuda (Reuss). 



Quinqueloculina seminuda, Reuss, 1865-6, FABS. p. 125, pi. i. fig. 11. 

 Miliolina seminuda, Heron-Allen & Earland, 1913, CI. p. 27. 



5 Stations. 



Very rare, but a good many specimens at Stns. 7 and 10. The finest and most strongly 

 marked, however, were at Stn. 23. 



