62 INTRODUCTION. 



C. Stewart. 



Elements of Natural History. 2 vols. 8vo. Edinb. 

 1817. 



Hugh E. Strickland. 



On the Naturalisation of Dreissena polymorpha in 



Great Britain. Loudon's Mag. of Nat. Hist. n. 



s. 1838, p. 381. 

 A List of some Land and Fresh-water Species of 



Shells found at Henley-on-Thames. Loudon's 



Mag. Nat. Hist. viii. 494. 



W. Turton. M. D. 

 Description of some New British Shells, accompa- 

 nied by Figures from the original Specimens. 



Zool, Journ. ii. 361. 

 This paper contains the description of Physa alba 



and Bulimus tuberculatus, received from Mr. 



Blomer : Sicilian shells, and scarcely British. 

 Conchylia Insularum Britannicarum. The Shells 



of the British Islands systematically arranged. 



Exeter, 1822. 4to. 

 A Conchological Dictionary of the British Islands. 



London, 1819. 8vo. 

 A Manual of the Land and Fresh-water Shells of 



the British Islands. London, 1831. 

 George Walker. 



Testacea Minuta Rariora nuperrime detecta in 



Arena Littoris Sandvicensis, a Gul. Boys ; multa 



addidit et omnium Figuras delineavit G. Walker. 



Lond. 1784. 4to. — The text was written by 



Edward Jacob. 



J. Wallace. 



A description of the Isles of Orkney. London, 

 1700. 8vo. 



