The Land and Freshwater Shells of Alberta. 175 



the widely distributed Vitrina l/tn/>ida, Hyalina arbor ea, Hyalina 

 rad/atula, Co mil 'us fulvus, Pa tula striate! la, Vallonia cost at a (form 

 gracilicosta) and Fetussacia subcylindrica. Besides these there are 

 specimens of three species of Pupa, namely P.anuifera (19 specimens,) 

 P. B /and/, (4), and P. Hoizingerifa) all collected from drift by the Red 

 Deer River. Lastly, there were specimens of 3 species of Succinea 

 which, throughout this paper I have called S. avara, S. ova/is and 

 S Grosvenori. I must say however that though using these names I am 

 of opinion that the first two are applied to shells specifically distinct 

 from the eastern shells that are so called. 



Of freshwater shells Mr. Wheeler collected 13 species ; the 

 ubiquitous Limnoea palustris and L. stagna/is, Planorbis trivolvis and 

 Physa keterostropha, Bulimies hypnorum and Pisidium abditum; also the 

 less abundant Limiuea desidiosa L. caperata and L. reflexa, Segmentina 

 armigera, Valvata tr/carinata (Red Deer River) and lastly a number of 

 specimens of Planorbis nautileus var. c> /status, which I begin to think must 

 be indigenous to North America. These last named shells were found 

 in moss from the bed of a muskeg in township 39, range 23, W. of 4th. 

 meridian. Specimens of L. reflexa in this collection are the largest I 

 have ever seen, attaining a length of 42 mm. 



The latest of Mr. Wheeler's collections was received in January 

 last and contains the shells collected by him during the summer of 1894 

 in Southern Alberta in the neighbourho jd of MacLeod and the Little 

 Bow River. 



There are not so many species in this as in the former collections 

 but among them are three notable additions to our list, Planorbis 

 umb/licd'e/lus (2 specimens), Limncea bulimoides and Sphozrium 

 Jayanum. The first named appears to be quite distinct from P. parvus 

 with which, judging merely from the original description and figure. [ 

 was formely inclined to unite it. This interesting shell was described 

 as Planorbis uinbilicatus by Mr. J. \V. Taylor in the English "Quarterly 

 Journal of Conchology " Vol. iv, p. 451 (July 1884), from specimens 

 collected by Mr. R. M. Christy, near Brandon, Birtle and Rapid City in 

 Manitoba. The name being pre-occupied it was changed to 

 umbil/catellus by Mr. T.D.E. Cockerell in the "Conchologists' Exchange'' 



