CAPULUS. 271 



present species might belong to the genus Hipponxjx 

 [Hlpponice] of Defrance. I think the Doctor must 

 have mistaken a lamina of the ovster shell for such 

 under valve, since no one else appears to have made the 

 same discovery. The supposed valve was not in his col- 

 lection when purchased by Mr. Clark. This, in com- 

 mon with other univalve mollusks, when taken from 

 the deeper parts of the sea, has a habit of getting out of 

 the water in which it is kept. It is of a sedentary and 

 inactive nature ; and its power of adhesion is consider- 

 able. Mr. Bretherton says, in the ' Zoologist ' for 

 1858, that it " could move for a few inches even on the 

 smooth sides of a glass jar. The proboscis or rostrum 

 (like that of Cyprtea, it appears to be of an intermediate 

 character) is capable of extension, and can be produced 

 beyond the shell." With respect to the embryology of 

 the present species, Mr. Clark observes that " the 

 matrix, or part thereof, is sometimes, perhaps always, 

 detached, and deposited on the neck of the foot, for 

 further development of the ova, for some time previous 

 to their being committed to take care of themselves/'' 

 The shell is frequently distorted. A specimen now 

 before me has its sides so much compressed that they 

 are nearly flat, and its mouth is narrowly elliptical ; it 

 had probably squeezed itself into the crevice of a rock. 

 The spire is occasionally broken off or decollated, and 

 replaced by a shelly convex plate. 



This species is the Patella Pileus Morionis major of 

 Da Costa ; and the young is the C. militaris of Macgilli- 

 vray and S . Wood, but not Linnets species of that name. 

 Hungaria is cited in the dictionaries of Facciolati and 

 Bayle as the country supposed to have been peopled by 

 the Huns; and the adjective must of course be spelt 

 accordingly. 



