FORAMINIFEEA OF THE WEST OF SCOTLAND. 211 



recorded, the specimens belong to the familiar carinate type, differing only in the degree 

 of development of the carina, but at Stns. 2, 3, and 4 a smaller form, entirely devoid of 

 carina and with somewhat rounded marginal edge, occurs in company with the carinate 

 specimens, though usually in smaller numbers. At Stn. 13 this type only was recorded. 

 The carinate specimens everywhere are large as compared with the round-edged variety. 



146. Cassidulina crassa, d'Orbigny. 



Cassidulina crassa, d'Orbigny, 1839, FAM. p. 56, pi. vii. figs. 18-20. 

 „ „ Brady, 1884, FC. p. 429, pi. liv. figs. 4, 5. 



22 Stations. 



Almost universally distributed, never very abundant, the best at Stns. 4, 10, 16, and 20. 

 There is a considerable range in form, depending primarily on the degree of inflation 

 of the chambers. A very flat complanate form, exhibiting both series of chambers 

 distinctly, was prominent at Stns. 10 and 16. At Stn. 3 and some others a very turgid 

 type, closely approaching C. subglobosa, occurs. These inflated varieties are always 

 much smaller than the compressed. At Stn. 4 the species exhibited a complete range 

 between the two types. 



147. Cassidulina subglobosa, Brady. 



Cassidulina subglobosa, Brady, 1879, etc., RRC. 1881, p. 60. 



Brady, 1884, FC. p. 430, pi. liv. fig. 17. 



17 Stations. 



Less widely distributed and less abundant than C. crassa or C. laevigata, but fairly 

 numerous at many Stns. The specimens, as a whole, seem rather small and with a 

 compressed tendency, linking them with C. crassa. but large and typical examples occur 

 at Stns. 10 and 20, and, less frequently, at many others. 



148. Cassidulina bradyi, Norman. 



Cassidulina bradyi (Norman MS.), Wright, 1880, NE1. p. 152. 

 „ Brady, 1884, FC. p. 431, pi. liv. figs. 6-10. 



5 Stations. 



Only a few rather small and poor specimens, the best at Stn. 4. 



149. Cassidulina nitidula (Chaster). 



Pulvinulina nitidula, Chaster, 1892, FS. p. 66, pi. i. fig. 17. 



Cassidulina nitidula, Heron-Allen & Earland, 1913, CI. p. 70, pi. v. figs. 6-9. 



5 Stations. 



An occasional excellent specimen, but the species is extremely rare in the dredgings. 

 This species appears, from our experience, to be widely distributed, though never 

 common. There are many records from Post-tertiary deposits, but it has only been 

 recorded by us as a recent British form (ut supra) since Chaster's original record. 





