25S cockerell: notes on land and freshwater mollusca. 



Buliimilus, but more regularly conical. Colour, greyish- 

 horn. 

 L. traskii Tryon. Oakland, Calif. (E. A. Enos), Berkeley, 



Calif. Near to tnmcatula^ but apparently a good species. 

 L. ovata van baltica L. Stockholm, Sweden. Small, pale, 



opaque, X^moX^ peregra var. ovata; 9^ mill. long. 

 Planorbis corneus var. elophila Bgt. Patschkau. Merely 



rather large specimens (max. diam., 31 mill.), encrusted 



with black. Inside of outer lip tinged purple-brown. 

 P. corneus var. stenostoma Bgt. Patschkau. Smallish 



cotimis (max. diam., 24J- mill.) with rather large mouth. 



In elophila the mouth is obtuse-pyriform ; in stenosioma it is 



roundish-reniform. 

 P. contortusvar. ingens Jetsch. Biersthal, Germany. Large, 



with a very narrow aperture; max. diam., 6 mill; nearly 



flat above. 

 Pisidium roseum Sch. Hirschberg, Silesia (Jetschin). This 



is not roseitm of British authors. It is shaped like pusilh^T?i : 



pale yellowish-horn, shiny; striate, like pnlcheUum; beaks 



rounded, not prominent. 

 P. intermedium Gass. Laibach, Carniola, Austria. Lat., 5; 



long., 4; crass., 2| mill. Shiny, rather smooth, grey-ochry. 



A form oi pusillum approaching y^?«//«rt!A'. 

 P. pallidum Gass. Glatz, Silesia. Grey rather dwW fonfi?iak. 



Lat., 4?.; long., 3^; crass., 2|- mill. 

 P. fossarinum Cless. Patschkau. Appears to be typical 



iiitidum Jen.! Grey, very shiny, much swollen; lat., 3; 



crass., 2 mill. Perhaps not g^nnme fossa rimim. 

 Sphaerium scaldianum Norm. River Stober, Creuzberg, 



Germany. Ordinary-looking cornenvi, rather globose, with 



prominent umbones. Margin of valves yellowish; lat., ii^-; 



long., 9^; crass., 7 mill. 

 S. lacustre var. steini A. Schm. Glatz. A whitish, shiny 



var., with beaks less distinct than usual, but still very 



distinct. Lat., %\\ long., 6|; crass., 4I mill. 



J.C., vi., Oct., 1890. 



