Manchester Memoirs, Vol. Ixii. (i9 : 7) 43 



portion of the shell assumes a quadrangular or pentagonal 

 transverse section. In fact the variety bears the same relation- 

 ship towards G. rugosa that Brady's Clavulina angularis, var. 

 difformis does to its type form. The examples are rather rare 

 but are well marked and form a distinct and easily recognisable 

 variety. Length .57 to .73 mm. 



(There seems to us to be very little reason for the creation 

 of this variety.) 



Genus Verneuilina, d'Orbigny. 

 73. Verneuilina tricarinata, d'Orbigny. 



Verneuilina tricarinata, d'Orbigny, 1840, Mem. Soc. Geol., 

 France (1), IV, p. 39, pi. IV, figs. 3, 4. 



Frequent, persisting through the whole thickness of the 

 Marl. The specimens found are variable in their proportions 

 and range between such forms as d'Orbigny's original drawing 

 and that figured by Terquem under the name of V . elongata. 



74. Verneuilina spinulosa, Reuss. 



Verneuilina spinulosa, Reuss, 1850, Denkschr, k. Ak. Wiss 



Wien, p. 374, pi. XLVII, fig. 12. 

 V . spinulosa, Brady, 1884, Chall. Rep., p. 384, pi. XLVII, figs. 



i-3- 



Very rare and minute in No. 7 gatherings only. 



75. Verneuilina recur vata, sp. nov. 

 Plate III, fig. 7. 



Test hyaline, formed of numerous chambers arranged 

 regularly in three series round a longitudinal axis. The 

 segments are long, narrow, and curved backwards, and each 

 one is considerably longer than the preceding one of the same 

 series. Lateral faces of the shell excavated. The dimensions 

 of an average specimen are, length, .25 mm., breadth, .25 mm. 



This new form is very easily distinguished from its nearest 

 ally, V . tricarinata. d'Orb. Its chambers are much narrower 

 and their septal faces are in the form of a high isosceles tri- 

 angle rather than an equilateral one as in V . tncari»ata. This last 

 characteristic gives rise to the excavation of the lateral faces, 

 which are hollow and curved inwards instead of being plane 

 as in d'Orbigny's species. The specimen figured does not show 

 the highest development of the backward curvature and 



