556 PROCEEDINGS Or THE GEOLOGICAL SOCIETY. 



It is rare, and found hitherto only on the surface of the block 

 extracted from the Liassic fissure in the Carboniferous Limestone of 

 HolweU. 



69. TuKBO EETicuLATUs, spcc. nov. PL XYI. figs. 11, 12. 



Shell turbinated; spire rather elevated; apex acute; whorls 

 4-5, convex, the lower rather inflated, and ornamented by promi- 

 nent transverse striations, which are decussated by others longitu- 

 dinally, giving the surface a reticulated aspect. Sutures distinct. 



This is a very pretty species; but in the only example I have, 

 the lower part of the body- whorl is concealed. 



Prom the coralliferous conglomerate of Brocastle. 



70. Turbo tumidus, spec. nov. PL XYI. fig. 14. 



Shell turbinated, rather small, convex; spire and apex obtuse; 

 whorls 4, with very fine transverse strise ; the body- whorl inflated 

 and convex. 



Several examples of this shell occur in the Brocastle conglomerate ; 

 and I have a specimen from the Charter-house lead-mine, 270 feet 

 from the surfaee. 



71. Amberleta tureita, spec. nov. PL III. fig. 19. 



Shell small, turreted; spire elevated; apex acute; volutions 5, 

 divided by a deep angulated suture. In the centre of each whorl 

 there is an elevated carina with rather distant but regular nodula- 

 tions, above which is an angulated area with longitudinal costae. 

 At the base of the whorl there is a small encircling finely nodu- 

 lated rib. Columella extended ; aperture large, rather ovate. 



Prom the Brocastle conglomerate, which has yielded only one 

 specimen. 



72. Turritella Howsei, spec. nov. PL XIY. fig. 14. 



Shell small, turreted, elongated ; apex acute, volutions 9-10, 

 spiral, slowly increasing, divided by a distinct angulated encircling 

 suture ; surface ornamented with faint transverse striae. Aperture 

 roundly ovate. 



I possess two examples of this shell, both of which are rather 

 abraded. They are from the Charter-house lead-mine, and belong 

 to the Lower Lias. 



73. Yalvata anomala, spec. nov. PL XY. figs. 7, 8, 9. 



Shell small; apex slightly raised, volutions narro^s^, convex, 

 thickening towards the aperture, and divided by a rounded or slightly 

 angulated suture ; aperture rather ovate ; lip slightly reflected over 

 a circular deep umbilicus. 



This shell is from the Liassic deposit at the bottom of the Charter- 

 house mine, and belongs to the age of the Lower Lias. At present 

 the species is represented by a single specimen. 



