366 Observations on Mr. Stutchburi/s 



brought to market in January, 1830, from which we obtained 

 many specimens. 

 Subgen. 2. Bernicla. 



1. Bernicla rufic611is, Red-breasted goose. Rare. One was shot on 



Kenton Warren, in 1828, and is now in possession of Mr. W. 

 Russell, Dawlish : a second was killed on Teign Marshes, Feb. 

 21. 1837, by Rendell of Buckland, and is now in preparation by 

 Mr. Drew. 



2. Bernicla leucopsis, the Bernacle goose. Rare. Mr. Comyns has 



two from the Exe. 



3. Bernicla Brenta, Brent goose. One is at Drew's, and 1 have 



another, killed here January, 1830. 

 Gen. Cy'gnus. 



1. Cygnus ferus, the Wild swan, or Whistling swan. Rare; but 

 obtained in hard winters. A specimen, shot on the Tamar, is in 

 the collection of J. Newton, Esq., at Bridestow, near Okehamp- 

 ton. In the winter of 1830, several visited our rivers. I saw 

 thirteen in the Plymouth and Devonport markets; and many 

 were shot in the North, of which I obtained one from Tor- 

 rington. 

 Plymouth, Jane 20. 1837. 



Art. VI. Some Observations on Mr. Stutchbury's proposed neiv 

 Genus of Univalve Shells, Cyprcecdssis. By G. B. Sowerby, 

 Esq., F.L.S., &c. 



The following observations have suggested themselves to 

 my mind upon a perusal of Mr. Samuel Stutchbury's paper, 

 published in your fourth Number, p. 21 k As I think they 

 are calculated in a great degree to invalidate Mr. Stutchbury's 

 conclusions (with which, by the way, he commences his paper), 

 I deem it necessary to trouble you with them : not that it is 

 my intention here to draw any positive inferences, but with a 

 view to enable the scientific world to form its own opinion as 

 fully as possible upon the case as it at present stands, and 

 also to excite attention to the subject, so as to obtain, if pos- 

 sible, further information of such quantity and quality as will 

 enable us to arrive at a decisive opinion upon the matter. 



In makino: these observations I intend, for the convenience 

 of reference, to follow, as closely as possible, the line marked 

 out by Mr. Stutchbury. In the first place, then, let me re- 

 mark, that he tells us that the animal of Cypraecassis has its 

 wrt^febilobed. Now, Gray says that it is the foot, and not the 

 mantle, which is bilobate, and which deposits the testaceous 

 matter, forming, in these remarkable shells, the very much 

 thickened outer and columellar lips. I do not, however, at 

 present insist upon this point; because, whichever it be, there 

 can be no reason to doubt that it is the same in the true 

 Cassides, as in Mr. Stutchbury's Cypraecassides. 



