

FORAMINIFEKA OF THE WEST OF SCOTLAND. 227 



89. Ammodiscus shoneanus (Siddall). 



Trochammina shoneanus, Siddall, 1878, FRD. p. 46, figs. 1, 2. 

 Ammodiscus shoneanus, Brady, 1884, FC. p. 335, pi. xxxviii. figs. 17-19. 

 1 Station. 



One typical individual of this minute but interesting species at Stn. 15, light grey in 

 colour. 



Trochammina, Parker & Jones. 



90. Trochammina inflata (Montagu). 



Nautilus inflatus, Montagu, 1803-8, TB. Suppl. p. 81, pi. xviii. fig. 3. 

 Trochammina inflata, Brady, 1884, FC. p. 338, pi. xli. fig. 4. 



1 Station. 



Very rare, and the specimens are rather weak, tending to collapse. 



91. Trochammina inflata, var. macrescens, Brady. 



Trochammina inflata, var. macrescens, Brady, 1870, FTR. p. 290, pi. xi. fig. 5. 

 „ „ ,, Heron-Allen & Earland, 1913, CI. p. 52. 



3 Stations. 



Also very rare, the best and most typical specimens at Stn. 21. 



92. Trochammina ochracea (Williamson). 



Rotalina ochracea, Williamson, 1858, BFGB. p. 55, pi. iv. fig. 112, pi. v. fig. 113. 

 Trochammina ochracea, Balkwill & Millett, 1884, FG. p. 25, pi. i. fig. 7. 



16 Stations. 



Generally distributed, often common. The species varies greatly in the extent of its 

 development. The thin and scale-like form (the original type of Williamson) is less 

 widely distributed and less common than the thicker form intermediate between this 

 species and T. squaniata, to whicli we have referred in our Clare Island paper (H.-A. & E. 

 1913, CI. p. 51). A double or " budding " specimen was found at Stn. 15, and an attached 

 specimen at Stn. 19. 



93. Trochammina plicata (Terquem). 



Putellina plicata, Terquem, 1875, etc., APD. 1876 (fase. ii.), p. 72, pi. viii. fig. 9. 

 Trochammina plicata, Balkwill & Millett, 1884, FG. p. 26, pi. i. fig. 8. 



(3 Stations. 



Very rare, but large and very fine specimens at several Stns., especially Stns. 3 and 20. 

 Specimens which had evidently been sessile and had become detached, preserving the 

 carinate periphery figured by us in the species T. ochracea from Kerimba (H.-A. & E. 

 1915, EKA. p. 619, pi. xlvi. figs. 27, 28), were found at Stn. 13. In these individuals 

 the base was quite fiat, the intervals between the wrinkled sutures being bridged with 

 a thin chitinous pellicle. 



