imperfectly -defined Species of Jurassic Nautili. 285 



We have lately had the great advantage of examining- a 

 specimen of the present species from the d'Orbigny Collec- 

 tion of the Museum of Natural History, Paris, and there is in 



Fi s . 14. 



Nautilus clausus.—a, lateral view, showing I he septate part of the shell 

 covered with the test, ami the cast of the body-chamber with part of 

 the anterior border of the muscular impression, represented by the 

 curved line; />, peripheral view, showing some of tin- septa at the 

 lower part of the figure. Drawn from a specimen in the d'< )rhignv 

 Collection of the Museum of Natural History, Paris. About one 

 half natural size. 



the British Museum a good representative of it from Moutiers 

 (Calvados). We have also seen a young specimen in the 

 Woodwardian Museum, Cambridge, which appears to belong- 

 to this species ; it is from Dundry, the only British locality 

 mentioned by d'Orbigny. N~. clausus is evidently rare in 

 England, for it is not recorded in any of the papers on the 

 geology of Somerset, by Etheridge, Tawney, and Stoddart ; 

 and Mr. E. Wilson has informed us that there are no 

 examples of it in the Bristol Museum. Under these circum- 

 stances the determination of this species by Wright from 

 Leckhampton Hill (Gloucestershire), and by Sharp * from 

 the Northampton Sands, must, in the absence of descriptions 

 and figures, be accounted of doubtful accuracy. The finest 

 specimen of this species that we have seen is from Sherborne, 

 Dorsetshire ; it measures 9 inches in diameter and Q\ inches 

 in width. 



* For references to these authors' papers 

 ibove. 



'' tin' table of synonymy 



