28 



jS. Cypraea arctica, Mont. 



Test. jun. Cypraea bullata, Mont. 

 Bulla diaphana, Mont. 



Animal orange ; mantle white, with a black strip- 

 ed dusky border ; eyes on bulgings at the external 

 bases of the long, tapering, and terete tentacula. 

 Over the head there is a hood, which, as well as the 

 male organ, is orange. The sides of the foot are re- 

 gularly striated transversely. 



Frequently cast on shore on the north coast : found 

 alive occasionally on the rocks, at very low spring 

 tides. The young si ell occurs but seldom. 



In the proceedings of the Zoological Society of 

 London, Mr. Harvey opposes the (now generally 

 received) opinion, that Cypraea bullata is the young 

 of Cypraea europaea. It is there said, " Cypraea 

 bullata is found in the same localities as Cypraea 

 pediculus, (europaea is meant), but it may be 

 doubted whether it is the young of that species. It 

 is so comparatively rare that Mr. Harvey has dredged 

 up only six specimens of it, while he has collected 

 more than a hundred of Cypraea pediculus. He 

 possesses, moreover, young individuals of Cypraea 

 pediculus, of a smaller size than specimens of Cyp- 

 raea bullata. In the latter, the whorls are more 

 produced at the apex, and the shell is so delicate as 

 to be broken by even a slight fall." (Zool. Proc. 

 pt. 3d. 1835.) To this it may be replied, that the 

 comparative size of young and old shells, is not a spe- 

 cific character in this genus ; witness Cypraea Ara- 

 bica. 



