238 MESSES. E. HERON-ALLEN AND A. EARLAND ON THE 



an extra long variety at Stns. 4, 19, and 20. Weakly striate examples connecting this 

 species with B. nobilis occur at many Stns. 



133. Bolivina nobilis, Hantken. 



Bolivina nobilis, Hantken, 1875, CSS. p. 63, pi. xv. fig. 4. 



Brady, 1881, FC. p. 421, pi. liii. figs. 14, 15. 



10 Stations. 



Sparingly distributed, and not abundant except at Stn. 4, where the best individuals 

 ;ire found; but at nearly all the Stns. where it occurs the specimens are more strongly 

 marked than is usual in British gatherings. 



134. Bolivina textilarioides, Reuss. (Pla^e 41. figs. 10-14.) 



Bolivina textilaroides , Reuss, 1862, NHG. p. 81, pi. x. fig. 1. 



Brady, 1884, FC. p. 419, pi. lii. figs. 23-25. 



17 Stations. 



Generally distributed, never very common ; very few strictly typical examples, the 

 best being found at Stu. 11. At many of the Stns. a very strongly-marked variety, 

 which we figure, occurs, characterized by a thickening of the shell-substance, accom- 

 panied in some instances by limbation of the sutures and coarse punctation. These 

 features combined often render the septal lines very indistinct. The best individuals 

 of this rough form occur at Stns. 4, 9, 14, and 18. Intermediate specimens, leading 

 from typical B. variabilis to this rough variety, occurred at the same Stns. and also at 

 many others. 



135. Bolivina laevigata (Williamson). 



Textnlaria variabilis, var. Itevigata, Williamson, 1858, RFGB. p. 77, pi. vi. fig. 168. 

 Bolivina lavigata, Brady, 1887, SBRF. p. 900. 



7 Stations. 



Only an occasional specimen, except at Stn. 20, where many good individuals were 

 observed. 



136. Bolivina dilatata, Reuss. 



Bolivina dilatata, Reuss, 1849-50, FOT. p. 381, pi. xlviii. (iii.) fig. 15. 

 Brady, 1881, FC. p. 418, pi. Hi. figs. 20, 21. 



19 Stations. 



Almost universally distributed. This is one of the commonest and most typical 

 Bolivinse of the dredgings, as, indeed, of most dredgings round the British coast. Two 

 very distinctive forms occur, nearly always in company : (i.j along narrow form not far 

 removed from B. cenariensis, and (ii.) a much shorter form which varies in two 

 directions — a thinner carinate form often having a denticulate margin and approaching 

 B. difformis, and a thick non-carinate type closely allied to B. robusta. The best 

 individuals at Stns. 11 and ]2. 



