522 Mr. Jeffreys's Supplement to the " Synopsis of 



Not the Planorbis lutescens of Lamarck, as I had supposed. 



P. Draparnaldi, p. 386. 



P. albusa. Pfeifer,3. 64? 



In the Honourable Lady E. Finch's collection of British 

 shells, mixed with the P. albus. 



The Helix rhombea of Turton's Conchological Dictionary 

 should be referred to a variety of the Planorbis umbilicatus, and 

 not this species. My error arose from having seen in the late 

 Mr. Miller's cabinet, specimens of the above, which Dr. Turton 

 had named " PL rhombeus." 



P. albus, p. 387. 



P. reticulatus. Risso. 



P. nitidus,p. 388. 



Abundantly in a pool on Wandsworth Common near London ; 

 and more sparingly in Battersea marshes and other parts of the 

 neighbourhood. The shells are frequently infested by the ova 

 of a small aquatic insect. 



Var. a. dupl6 minor, subt^s lath umbilicata. 



This was given to me by the Provost of Eton, who received it 

 from Mr. Bean of Scarborough, and may possibly be a distinct 

 species. Its form is intermediate between the PL nitidus and 

 lineatus. 



P. lineatus, p. 389. 



P. clausulatus. FSrussac, Concordance ^-c. 



Ancylus. 



This genus, as M. Rauq remarks, has not ceased from being 

 bandied about from one family to another ; and even now, its 

 proper position among the Scutibranchous (for it is quite certain 

 they do not belong to the Pulmonobranchous) Mollusca, is far 



from 



