26o JOURNAL OF CONCHOLOGY. 



20. Anodonta anatina, Drap. ) Duck muscle. 



Mytilus anatimis, Lin. Syst. J Don., vol. iv., t. 113, 



Most abundant in all our ditches, ponds, and rivulets, and 

 is the food not only of fishes, but also of water birds and 



[Page 26.] 

 crows. This species varies much in size and colour, and 

 like the River pearl muscle it is often found with the um- 

 bones decorticated. 



[I believe the greater portion of Anodonta taken in 

 the district are correctly referable to anatina; so far as my 

 experience goes the type of cygnea does not occur, but 

 then again the specimens are not pronounced anatina^ 

 but various intermediate forms. All my specimens, how- 

 ever, are taken from moving water, not ponds. Alder, in 

 his catalogue, refers only to anatimcs. — B. H.] 

 ^—^^ 



NOTES ON LIMN MA PEREGRA vars. BURNETTI 

 AND LACUSTRIS. 



By J. MADISON. 



(Read before the Conchological Society). 



I v^TAS much interested in Mr. William Nelson's very lucid 

 article upon Limncea peregra var. burnetii in the April number 

 of this journal and his description of the shell from the Welch 

 locality, which he thinks may be referred to burnetii. I went 

 to find the shell and see the kind of place it inhabited. The 

 lake is of considerable size, being about three miles round, and 

 situated in the Black Mountains on the Carmarthenshire side. 

 It is a very barren and desolate place, there not being a tree 

 and scarcely a shrub to be seen. 



The shells were numerous, as also were Ancylus fiuviatilis. 

 While the Limncea peregra were very much the shape of burnetii 

 in the body whorl, they varied slightly in the length of the spire, 

 but none of them had the spire intorted. From Dr. J. G. 



J.C, v., Jan., 1888. 



