1420 Mollu&ks. 



and was unable to find its way back. It is calculated by experienced fishermen that 

 during its course it must have passed about two hundred nets ! The royal fish is to 

 undergo a preserving process, and will be exhibited to the public. — Id. 



Dreissena polymorpha in unnavigable water. (See Zool. 254, last line). — Some 

 eight years ago, while angling in an old milll-dam at Toton, Notts, with my brother, 

 he pulled up on his hook a specimen of Dreissena polymorpha, adhering to a 

 stone. The dam is supplied by the Erewash, a small shallow stream which joins the 

 Trent nearly a mile from the place, that river being the nearest navigable water. I 

 afterwards found numbers of these Mollusks adhering to the stones underneath the 

 waterfall of a pond at Lentou, near Nottingham, to which they must have gone up a 

 very small brook fully a mile from a canal ; in which, however, though I have fre- 

 quently searched, I have never found them. — George Wolley ; 9, Cambridge Street^ 

 Liverpool, February 23rd, 1846. 



Mollusca found in Cornwall. — The following is a list of species belonging to the 

 Lamarkian family Polythalmia which have been found in Cornwall. For the first 

 five species I am indebted to Mr. Couch's Fauna of the county. For the rest I am 

 responsible, and have specimens of all in my cabinet. The list, however, must be 

 very incomplete, my observations having been almost exclusively confined to Fal- 

 mouth harbour and its immediate vicinity, so that the list is almost simply an enu- 

 meration of the inhabitants of that one locality. 



Orthocera recta (Montague's Nautilus rectus). This, Mr. Couch has found adher- 

 ing to the shell of a Pinna from deep water. 



Orthocera imperforata (Fleming). This shell is usually classed as a Dentalium. 

 I regret that I have not had an opportunity of examining it. 



Spirula australis. It sometimes floated to our coasts. 



Vermiculum perforatum (Mont.) Found in Cornwall by Montague. 



Vermiculum intortum, (Mont.) Not uncommon. In Thorpe's ' British Marine 

 Conchology ' no mention is made of the strong central tooth which is found in the 

 aperture of this species. 



Vermiculum oblongum, (Fleming). Of this rare species I have obtained a few 

 specimens from oyster shells, dredged in Falmouth harbour. 



Vermiculum subrotundum, (Mont.) A few specimens from Falmouth harbour on 

 oysters and in shell sand. I consider it one of our rarer species. 



Vermiculum Wollastonianum, (King.) Upon the oysters dredged off St. Mawr's 

 1 have found a species which I have provisionally named as above, because it is cer- 

 tainly new to the British Catalogue. I regret that I have not had an opportunity of 

 consulting any foreign works, and therefore I am quite ignorant whether it has ever 

 before been described. The following is the description of the shell : shell suboval, 

 strongly striate longitudinally, very thick in the centre, flat on one side, very convex on 

 the other. On the flat side three volutions are visible, on the convex side four. Co- 

 lour reddish yellow. Aperture oblong or even linear, with a very narrow, erect linear 

 tooth extending more than halfway up the centre of the aperture. Length 0.03 inch. 

 I have dedicated this species to my friend T. V. Wollaston, Esq., B.A., F.C.P.S., 

 Jesus College, Cambridge. 



Vermiculum bioarinatulum, (King.) This species I have ventured to name for 



