376 Mr, Miller on the Freshwater and Landshells [May, 



Article IX. 



~A List of the Freshwater and Landshells occurring in the Envi- 

 rons of Bristol, with Observations. By J. S. Miller, ALS. 



(To the Editor of the Annals of Philosophy/.) 



SIR, JBm^o/, Jtfarc/i 11, 182?. 



If the following catalogue of the fluviatile and terrestrial shells 

 occurring in the neighbourhood of Bristol, drawn up from my 

 -own personal observations, should be judged worthy of a place 

 in the Annals ofPhilosophj/, it is entirely at your service. 



Your obedient servant, J. S.Miller. 



To attach any high degree of value to local catalogues of this 

 nature would be to exaggerate the interest and importance of 

 contributions which can hold but an humble and subordinate 

 olace in the pages of science, still they are far from useless. 

 JBeing founded on personal observations more precise in propor- 

 tion as they are more limited, they furnish the surest foundation 

 on which more general results may be built, and in the present 

 stage of zoological inquiry can hardly fail to afford many new 

 facts. 



Thus the field of observation which the present list comprises 

 "will be found to afford several species not hitherto recognised as 

 British, and some hitherto entirely nondescript. I have been 

 enabled also, in the course of my local researches, to glean some 

 new facts with regard to the habits and organization of some of 

 4;hese animals which appear to have escaped the notice of former 

 inquirers, and have availed myself of the present opportunity of 

 recording them. 



In the following list I have adopted the names published in 

 Dr. Maton and Mr. llackett's Descriptive Catalogue of British 

 Testacea in the Linnean Transactions, vol. viii, and occasionally 

 added those new generic names which have been stated by more 

 modern authors. 



1. Mya pictorum. Freshwater. 

 Unio pictorum. Drapornaud. 



2. Tellina cornea. In ditches. 

 Cyclas cornea. Drapernaud. 



3. Tellina lacustris. In ditches. 

 Cyclas lacustris. Drapernaud. 



4. Tellina pusilla. In pools. Dillwyn's Cat. of Rec. Shells, 



5. Tellina amnica. In ditches. 



Ohservatiofi. — 1 have met with individuals of the above four 

 species of tellina, containing minute young living shells which 

 prove the animals viviparous. 



6. Mytilus anatina. In rivers and pools. 

 Anodanta anatina. Drapernaud. 



