326 The I?ish Naturalist. November, 



to separate it by external characters : the anatomy of these 

 somewhat dubious forms is, however, undoubtedly that of H. 

 ccllaria and they may be referable to the var. compacta of 

 Jeffreys." 1 It may here be noted, that whilst Mr. Taylor 

 says that the anatomy is undoubtedly that of cellajia, Mr. 

 Moss states that the anatomy is nearer to cellaria than 

 Draparnaudi. 



My attention was first called to this form a few years ago, 

 when several examples were sent me with other shells from 

 Beginnish Island, Valentia, Co. Kerr) 7 , by Miss Delap. Noting 

 at once their difference from typical English and continental 

 cellaria an attempt was made to identify them, but this I was 

 unable to do, and they were placed on one side to await deter- 

 mination. In spite of the repeated statement that these 

 shells were cellaria^ I have always been doubtful of the identi- 

 fication, although in correspondence I have called them by 

 that uame. In the early part of this year Mr. R. Welch, 

 M.R.I. A., kindly forwarded me a large series of living examples 

 from Murlough Ba} r , the first living specimens I had seen, and 

 my original doubts were at once confirmed on noting the dark 

 coloured animal, so different from the light-coloured form of 

 the south-east of England. Examples were sent to Dr. O. 

 Boettger, of Frankfort, and to Rev. E- W. Wake Bowell, 

 whose knowledge of the anatomy of our non-marine mollusca 

 is unsurpassed. Dr. Boettger's determination is as follows: — 

 " The Hyalinia from Murlough Bay I have as cellaria var. 

 compacta Jeff, from Gills Bay, Caithness; the nearest con- 

 tinental shell I have is a var. of V. Draparnaudi Beck from the 

 Botanical Gardens, Dresden." 



Rev. E- W. Wake Bowell at once pronounced the Irish 

 shells to be distinct from cellaria. He says : — " Your Irish 

 specimens are readily distinguished from all the cellaria I 

 have seen by the shape of the central tooth. This, of course, 

 varies in different specimens, but not so as to make distinction 

 impossible. The basal plate is also different. The bluntness 

 of the teeth on the Irish examples remind me of alliaria in 

 this respect. I have examined young cellaria radulae to see 

 whether they are the same as alliaria, but they do not appear 



1 " Monograph," part 14, p. 37. 



