362 APPENDIX. 



excavated ; while the aperture is of considerable length, 

 and the columella at the base suddenly arched. Long, 

 i inch. Hob. Esquimalt Harbour, Vancouver Island. 

 (Brit. Mus.} 



HELICIDJE. 



Helix TWnsendiana. (Lea.) Sumass Prairie, British Columbia. 



- fidelis. (Gray.) Common east and west of the Cascades ; occurs 



6,000 feet above sea level. 



- Dupetit-Thouarse. (Desch.) Sumass Prairie and Vancouver Island. 



- villicata. (Forbes. ) Sumass Prairie and Vancouver Island. 



- Columbiana. (Lea.) Banks of the Fraser River. 



SUCCINHLE. 



Succinea rusticata. (Gould.) Sumass Prairie. 



Suc&inea HawJdnsii. (Baird : Nov. Sp.) 



Testa elongato-obovata, tenui, pellucida, nitida, 

 undulato-striata, rubella, intus margaritacea, spira acuta; 

 anfractibus quatuor, convexis, ultimo duos trientes 

 longitudinis testa? adequante, sutura impressa, apertura 

 ovali, inferne effusa. 



This shell is of an elegant form, and of a pinkish 

 colour, with the interior of a pearly lustre. It is smooth 

 and shining, but marked with waved striae of lines of 

 growth. It resembles very much in figure the Succinea 

 Pfeifferi of Europe, but is of a still more elegant shape, 

 and of a brighter hue. 



I have named it after Lieut.-Col. Hawkins, R. E., 

 Commissioner of the British North -American Boundary 

 Commission. Long, f inch ; lat. ^ inch. Hab. Lake 

 Osoyoos, British Columbia. (Brit. Mas.*) 



