TMK NAUTILUS. 103 



critically examined by Dr. V. Slerki, without whose generous assist- 

 ance it would have been impossible to determine the many small 

 species. 



There is some additional material in the hands of Dr. Sterki, 

 which when straightened out will probably add a number to the list. 

 Most of the species are distributed over the whole area, and the 

 names of localities are only cited in referring to species that are 

 very local in their distribution. 



In this list are included a number of species that have been cited 

 as doubtful in Maine, and the new species recently collected by me. 



LlST OF Sl'KCIKS. 



Acanthinula Jnnp/i Say. One specimen at Fort Kent. 

 Vallonia pulcltella Miill. Gardens in Caribou and Presque Isle. 

 . Vallonia cxcviihicn Sterki. Rare, Caribou. 



Polygyra <ill>ll>ris Say. Not common. 



Polygyra Stnjil Binn. Well distributed. 



Polygyra dent if era Binn. Rather common. 



Polygi/ra nioimdnn Rackett. Common in some localities. 



Strobilops labyrinthica Say. Plentiful in this region. 



Strobilops rinjo Pils. Rare (identified by Dr. V. Sterki). 



Bijidaria j>citt<><l<>n Say. '' Resemble cnrfii/ei)S more than any 

 others I have seen " (Sterki). Near Caribou stream, Woodland. 



Vertigo ventricosti Morse. Plentiful in some localities. 



Vertigo ventricosa ehitior Sterki. Common along streams, in 

 Woodland. Caribou and New Sweden. 



Vertigo bollesiana Morse. Rare ; collected in woodland. 



Vertigo Goiildii Binn. Not very abundant. 



Vertigo Gonlilii pnnnluxa Sterki. "Fine examples with the two 

 palatal folds continuous and one angular" (Sterki). Woodland, rare. 



Cochicopa ln.l>rica Miill. Iloulton, Presque Isle, Caribou, Fort 

 Kent and Portage Lake, abundant in these localities. 



Vitrinn Jniij)iii(i GUI. Caribou and Presque Isle, found in large 

 numbers this summer at Fort Kent. 



Vitrea hammonis Strom. Fairly distributed. 



Vitrea Binneymxt Morse. Little Madawaska Lake and along 

 Caribou stream in Woodland and Caribou. 



Vitrea ferrea Morse. In company with V. fiinneyana. These 

 species are rarely found. 



Gonulus fulous Mull. Everywhere. 



