17 

 Succinea sp. 



Material Examined 



It is impossible to refer these small retusa-\\ke Succineas with any 

 degree of certainty to any of the described species, but without the animals 

 which writers are now generally agreed must constitute the main reliance 

 in working out of the prevailing chaos in this group it would, probably, not 

 be in the interest of science to describe them as new. The specimens 

 from west of the Rockies are in poor condition; hence it is by no means 

 certain that all the lots listed are referable to the same species. The west- 

 ern Succineas are very poorly understood and many of them are, therefore, 

 in a state of supreme confusion in the literature. They need competent 

 revision badly. All the present specimens were labelled "Succinea ovalis 

 Gould" by Dr. Whiteaves. 



284217 



