TO GEOLOGY. 195 



T. Goldfussii* Plate 6. Fig. 208. 



Description. Turbinolia cuneate, granulate, with twenty- 

 four longitudinal furrows ; furrows on each side ten, con- 

 verging towards a point near to the middle of the base on 

 each edge two, slightly curved and extending nearly to the 

 base ; base nearly straight, star elliptical ; lamellae rugose. 



Diam. 3-20ths, Length 5-20ths, Breadth .2, of an inch. 



Observations. This species closely resembles the last. 

 The furrows are not, however, so marked, and the two 

 curved ones are replaced here by two which converge like 

 the enclosed eight. It is not quite so broad, and the base 

 is more disposed to be round than emarginate. It seems 

 generally to be rather smaller in size. In outline as well 

 as in the furrows there is a greater resemblance between 

 the Goldfussii and the crispa, than there is between the 

 Stokesii and crispa. There being no difference between 

 the granulation of the Stokesii and this species, it is not 

 considered necessary to make an enlarged view of them. 



T. nana. Plate 6. Fig. 209. 



Description. Turbinolia subcuneate, longitudinally rib- 

 bed ; furrows apparently without perforations ; ribs twenty- 

 four, about sixteen of which descend to the base, where 

 they are wrinkled ; star elliptical ; style apparently none. 



Diam. l-20th, Length .1, Breadth over l-20th, of an inch. 



* Named after Dr Goldfuss, the author of the admirable work " Petre- 

 facten,'' &c. 



