Quarterly Journal of Conchology. g 7 



Jeffreys gives fourteen varieties. Some of these may clearly be 

 attributed to local circumstances. There are some stated to have 

 been procured from rivers, others from lakes, others from 

 marshes by the sea coast, and others again have been "thrown 

 up by the tide at the mouth of rivers." The most extraordinary 

 v^ariety (not confined to this species) in my humble opinion is 

 decollafa, in which the "shell is more or less eroded, spire. truncate" 

 so that the fact of a shell being eroded gives it the title to rank as 

 a variety. ! In his Introduction p. li, Mr. Jeffreys gives several 

 reasons which may account for erosion. I have noticed the erosion 

 in specimens of L. stagnalis kept in confinement in my aquarium, 

 which in course of time have been converted by erosion (by what- 

 ever cause produced) into Z. stagnalis var. decollata, a variety which 

 I perceive is unknown to Mr Jeffreys. 



But my paper has already exceeded the limits which I intended 

 so that I must leave the examination of the genera and species to 

 your readers, and I shall be very glad if some of them can help 

 me to remove the diificulties whieh perplex my mind as to what 

 really constitutes the difference between a species and a variety, 

 and if they will also make clear to me what is the principle upon 

 which the differences are formed. 



DISCOVERY OF SUCCINEA OBLONGA, (Draparnaud) 

 NEAR CORK. 



I can confirm the fact of the existence of this species near Cork, 

 a locality mentioned rather doubtfully by Jeffreys, British Conchol- 

 ogy, Vol. I, p. 155. I found a couple of specimens under Ivy on 

 a stone wall about two miles to the west of the town, and more 

 numerous individuals under stones in an old quarry near Baliin- 

 coUig, about five or six miles to the west of the former locality.-*- 

 C. P. Gloyne, September, I875. 



Cochlicopa lubrica var. ovata. — While searching for spe- 

 cimens oi Helix fiisca at Bank Wood, near Wakefield, I found a 

 specimen of this variety. — J. Hebden, Aug. 7th, 1875. 



THE GENUS EATONIA. 



Our readers will find, on referring to the Bibliographical Notice 

 of New Shells from Kerguelen's Island at p. 86 of this Volume, 

 a mention of a new Genus which has been characterized under the 

 name of Eatonia by Mr. Edgar A. Smith. The name has however 

 been pre-occupied by Hall in 1859, to designate a genus ot fossil 

 Brachiopoda, in compliment to the American Prof. Amos Eaton. 

 See Tate's appendix to Woodward's Manual of the Mollusca, p. 59. 



