CUNDALL: on the mollusc a of BRISTOL. 267 



One or two pecuHarities of the districts may be worth 

 noticing. Leigh Woods, Kenn Moor and the river Froom are 

 each rich in specimens, and from each I have obtained shells 

 unobtainable (so far as I have been able to ascertain) elsewhere; 

 but on the other hand, in the majority of instances, but few 

 species are found associated, and hence collecting is rendered 

 laborious. 



As to marine shells, but few are procurable in the vicinity. 

 Tellina solidula (dead) is common among the rejectamenta of 

 the river. lanthina comvnmis is reported to have been found in 

 a similar situation, and Sowerby's Illustrated Index assigns to 

 Petiicola lithophaga a habitat at Bristol. 



At Weston-super-Mare, Clevedon or Burnham, all within easy 

 reach may be found Cylichna obtusa, Tellina solidula, Nuciila 

 nucleus, Scrobiculatia piperita, Rissoa ulvcea, a Q.Q\y<^\t oi Littorince. 

 and a few other common species. 



Bristol, November 26th, 1881. 



I ■■■ r' a o OT O Ooa a n ii. 



Note on Gundlachia. — This seems a widely diffused 

 genus, ranging from New York to Tasmania; I daresay it occurs 

 in the Brazils. I have been rather sceptical about it, but not on 

 very good grounds, but both Mr. Sanderson Smith and Mr. Guppy 

 say that at certain times of the year the septum is absent, and at 

 all times the majority of specimens have none. Again, I have 

 seen a slight trace of a septum in our Ancylus fluviatilis, where it 

 has been left dry at times by the stream retiring. A Mexican 

 species of Ancylus found by me and referred to Mr. Guppy, was 

 at first assigned to Gtmdlachia, but we could find no septum. — 

 J. S. Gibbons, M.B., Modderfontein, Cape Colony. 



