0/0 



tut be that as it may, it is without doubt the young of 

 Venus verrucofa: in that (late it is not only much lefs 

 Convex, but the tranTverfe ridges are much thinner, 

 defiitute of ihe warty appearance, or very imperfecily 

 fo at the anterior end, and faintly flriated longitudinally 

 in the furrows, which gives it a cancellated appearance 

 towards the beak, where the tranfverfe ridges are not 

 much elevated. 



When thefe (hells attain the length of an inch and a 

 quarter, or thereabouts, they lofe the longitudinalitria?, 

 and the rirlges become (trongly verrucofe; they are, 

 however, in moPi of the full grov/n fpecimens, to be 

 traced about the umbo. 



Chemnitz has (igured the young F. verrucofa vol.vi. 

 tab. 29. (ig. 304. 305. and refers to the V. cancellata of 

 •LivN^EUS : and in the fame tab. (ig 3o5. 307. is another 

 Avhich he gives as a variety ; this is much broaderin pro- 

 portion to its length, than what the verrucofa is ufnally 

 found to be. Thefe (igures Gmelin quotes for his V. 

 cancellata ; fo that bv collating thefe references with 

 ■the figures in quellion, and comparing the various and 

 numerous fpecwnens, now before us, Q)S.\\\& verrucofa, from 

 the fize of a pea upwards, we have very little doubt hut 

 in its younger (late it has been defcrihed as a diflinft 

 fpecies, under the title cancellata; and that thefe are, 

 aciually one and the fame (Ivell, in diflc rent periods of 

 growth. It mull al(b be remarked, that the verrucofa. 



