F0RAM1N1FERA OF THE WEST OF SCOTLAND. 



'243 



154. Lagena aspera, Reuss. 



Lagena aspera, Reuss, 1861, SAWW. vol. xliv. p. 305, pi. i. fig. 5. 

 Brady, 188L, FC. p. 457, pi. lvii. figs. 7-10. 



2 Stations. 



One small and nearly globular specimen at Stn. 4 and one normal oval specimen at 

 Stn. 17. 



155. Lagena hispida, Reuss. (Plate 41. fig. 16.) 



Lagena hispida, Reuss, 1858, FP. p. 434. 



Brady, 1884, FC. p. 459, pi. lvii. figs. 1-4, pi. lix. figs. 2-5. 



9 Stations. 



Very scantily represented, but a few excellent specimens at Stns. 2 and 20. From 

 the examination of a long series of specimens at other localities, we have little doubt- 

 that L. hispida is one of those species of Layena with compound shell-structure — 

 i. e., the shell-structure can be separated into distinctive layers. The internal layer is 

 normally clothed with a dense " pile " of most delicate needles of equal length, and 

 their points coalesce to form a rough or " mat " surface. The spirally ornamented neck 

 is free from all exogenous growth. The " mat " outer surface is very easily destroyed ; 

 the spines then fall off, and only their bases are left, giving a faintly hispid surface 

 to the test — this is the stage in which British specimens are usually found. A still 

 further stage of attrition leaves practically no trace of the original spines, and a globular 

 test with a dull surface remains. We figure a specimen from the North Sea. which 

 illustrates the real nature of the test better than any of the ' Runa ' examples, which 

 are all in a more or less advanced stage of denudation of the outer layers. 



156. Lagena lineata (Williamson). 



Entosolenia lineata, Williamsou, 1848, BSGL. p. 18, pi. ii. fig. 18. 

 Lagena lineata, Brady, 188i, FC. p. 461, pi. lvii. fig. 13. 



16 Stations. 



Generally distributed, but rather rare, the best at Stns. 7, 12, and 19. On the 

 whole, the specimens are very feebly marked, but strong and typical individuals were 

 found at Stns. 7 and 19. At Stn. 10 a double shell, the two individuals somewhat 

 distorted and joined at their bases, and at the same Stn. was found a specimen rough 

 or feebly hispid all over. 



157. Lagena COStata (Williamson). (Plate 41. figs. 17, 18.) 



Entosolenia costata, Williamson, 1858, RFGB. p. 9, pi. i. fig. 18. 

 Lagena costata, Balkwill & Wright, 1885, DIS. p. 338, pi. xiv. figs. 3-5. 



18 Stations. 



Widely distributed and abundant at some Stns., notably Stns. 3, 7, and 10 ; at other 

 Stns. the individuals are large and typical. At some of the other Stns. a small weak 



