194 CONTRIBUTIONS 



T. Stokesii* Plate 6. Fig. 207. 



Description. Turbinolia cuneate, granulate, with twenty- 

 four longitudinal furrows ; furrows on each side ten, two 

 of which are incurved and extend nearly to the base on 

 each edge two, slightly curved and extending nearly to 

 the base ; base emarginate ; star elliptical ; lamellae rugose. 



Diam. 5-20ths, Length 7-20ths, Breadth 7-20ths, of an inch. 



The segment is a magnified view. 



Observations. This is a beautiful species, resembling 

 very slightly in outline the T. crispa~\ (Lamarck). It is, 

 however, more cuneate, and the situation of the furrows 

 is different. The furrows on the sides of the Stokesii 

 are marked,&quot; and from the edge of the star converge nearly 

 to a point below the centre on each side. Anxious to dis 

 cover if any of the Turbinolice possessed the same character 

 with some of the Lunulites, (the enclosing in the calcare 

 ous matter a grain of sand as a point of commencement 

 of growth, or as a balance) I first opened specimens 

 of the Jlfaclurii without success ; then specimens of the 

 Stokesii and Goldfussii, in both of which the grain was 

 found ; several pharetra were next examined, but in none 

 was it to be seen. Having but a single specimen of the 

 nana, I could not submit it to an examination. 



* I have placed on this species the name of the late secretary of the 

 Geological Society of London, distinguished for his activity in promot 

 ing the knowledge of natural science. 



t See Goldfuss, vol. 1, p. 15, %. 7. 



