FOEAMINIFERA OF THE WEST OF SCOTLAND. 259 



Lingulina, d'Orbigny. 



221. Lingulina biloculi, Wright. 



Lingulina carinata, var. biloculi, Wright, 1910-11, ECM. p. 13, pi. ii. fig. 10. 

 „ biloculi, Heron-Allen & Earland, 1913, CI. p. 94, pi. viii. figs. 5-7. 



5 Stations. 



Frequent and finely developed at Stn. 11, rare at the other Stns. All the protean 

 forms assumed by this species occur in the dredgings. 



222. Lingulina carinata, d'Orbigny. 



Lingulina carinata, d'Orbigny, 1826, TMC. p. 257. No. 1, Modele No. 26. 

 Brady, 1884, FC. p. 517, pi. lxv. figs. 16, 17. 



1 Station. 



One specimen of the same type as that figured in our Clare Island Report (H.-A. & E. 

 1913, CI. pi. viii. fig. 9) at Stn. 17. 



223. Lingulina carinata, var. bicarinata, Sidebottom. (Plate 42. figs. 3-5.) 



Lingulina carinata, var. bicarinata, Sidebottom, 1904, etc., RED. 1907, p. 3, pi. i. fig. 20. 



Heron-Allen & Earland, 1913, CI. p. 94, pi. viii. figs. 3, 4. 



1 Station. 



A few specimens at Stn. 4. They differ from our Clare Island specimens, and from 

 the type, by the presence of a strong rib running down the middle of the face of the 

 first chamber. One of the specimens has also three chambers, a fact not previously 

 observed in the variety. It has only been previously recorded by us as British (ut supra). 



224. Lingulina carinata, var. seminuda, Hantken. (Plate 42. figs. 6, 7.) (New 



to Britain.) 



Lingulina costata, var. seminuda, Hantken, 1875, CSS. p. 41, pi. iv. fig. 8 b, b. 

 ,, carinata, var. seminuda, Brady, 1884, FC. p. 518, pi. lxv. figs. 14, 15. 



1 Station. 



At Stn. 4 a few little specimens, which we figure and which we think should be 

 attributed to this form, although, owing to their extreme minuteness and hyaline 

 character, they differ considerably from the large deep-water specimens figured by 

 Brady from the Atlantic. The test is bilocular, the last chamber forming quite three- 

 fourths of the total bulk of the shell, and furnished with a long curving entosolenian 

 tube, which runs diagonally to the lower outer edge of the chamber. The margin of 

 the entire shell is thickened and slightly constricted on its inner edge, so as to form a 

 fine groove running round inside the edge of the shell. These markings we consider 

 homologous with the sulci of the deep-water form. 



