1917] The Ottawa Naturalist 43 



occurring in low woods and along the margins of streams. A pair in 

 copula were observed on May 9th, 1917. 



PUPILLIDAE. 



39. Strobilops virgo (Pilsbry). Go Home Bay, July 16th and 

 17th, several specimens were taken and it may have been plentiful but 

 was not distinguished from Euconulus until examined later. Found 

 in a wooded ravine. A* dead specimen was also taken from the drift 

 along the Don River, Toronto, in November. 



40. Acanthinida harpa (Say). Living specimens and fresh 

 shells, mostly mature, were found in considerable numbers in a sandy 

 pine wood on the Giant's Tomb. Island, July 20th. It was not observed 

 elsewhere. 



41. Bifidaria armifera (Say). Miss Ford has a single speci- 

 men taken at Lambton, (West Toronto) from a "dry, rocky flat," 

 September 9th, 1916. It has already been recorded from the Toronto 

 district. 



42. Bifidaria contractu (Say). I found a few specimens of 

 this species on July 24th under wet logs and stumps on the edge of 

 \\ 'ilson's Creek (De Grassi Point), in its upper part where it is a mere 

 brook. One or two others were found in a low wood near the lake 

 shore. At Toronto I found them in much larger numbers along the 

 banks of the Don River, in November. 



43. Bifidaria iappaniana (C. B. Adams). A specimen, nearly 

 mature, was found in a rich hardwood forest on the Giant's Tomb 

 Island, July 20th. Another specimen, fully mature, was taken at 

 Toronto, from the banks of the Don River in November. A single 

 adult was also found at De Grassi Point. 



44. ]'crtigo ovata Say. A single adult was taken at De Grassi 

 Point on August 25th, from a low wood of poplar, cedar, etc., near the 

 lake shore. Another, very nearly mature, was taken from the banks of 

 the Don River, Toronto, in November. 



45. Vertigo ventricosa (Morse), t Several specimens of this 

 species were taken at De Grassi Point at the same spot where V. ovata 

 was found. Adults were found during July, August and September. 

 A single specimen was also taken from the drift along the edge of the 

 Don River in November. 



46. Vertigo elatior Sterki. De Grassi Point, associated with V. 

 ventricosa and apparently commoner. It was not recognized as dis- 

 tinct until determined for me bv Mr. Brvant Walker. 



All of these Vertigos were taken most frequently from under the 

 sides of chips and blocks of wood from a recently felled aspen poplar. 

 A few were also taken from rubbish in a cedar grove, where they were 

 associated with Sphyradhim edentidiim. A specimen of V. elatior was 



