226 



Fvpa coiticar'ui, Say. — Tn a letter to me Mr. Heron state.s tliat 

 this shell is common in Billings' Bush under logs and bark and in moss 

 at the I'oot of trees ; but I have succeeded in finding only a few- 

 specimens. Several, however, were found in the moss collected in 

 Dow's Swamp by Mr. Harrington. It resembles pentodon, but is 

 longer and more .slender and has only one or at most two teeth. The 

 number and ai-rangement of the teeth render it quite easy to determine 

 the identity of these small shells. 



Vertigo ffouldii, Blnney. — The vertiyos are still n)ore minute than 

 the pupas, but the chief difference between the two genera is in the 

 structure of the animals. In vertigo the lower tentacles ai'e wanting, 

 while in piijya they ai-e, though short, always ])resent. 1'. gouldii is not 

 I'are. I have found it sparsely distributed in a number of localities and in 

 abundance in one. This is on the left bank of Bi-igham's creek, at the 

 liead of the rapids, below Washburn's axe factory. An embankment 

 has been constructed from the railway to the creek, and under and 

 on the sides of the stones that lie on the grass near the shore this 

 species is sometimes so common that I have collected thirty or forty 

 there in the course of half an hour. On other occasions I have been 

 unable to obtain more than two or three specimens. Unlike our pupas 

 and like our other vertigos, one excepted, this species is of a brownish 

 color. Binney (Gould's Invt., 2ntl Ed., 440) gives the number of whorls 

 as " rather more than four." One shell has fully five, but otnerwise 

 agrees with the type. Its length is 1-9 mm., diameter 1 mm. 



Vertigo hollesiana, Morse. — Like Striutura Jerrea, tliis rare sliell is 

 now recorded from Canada for the first time. The only si)ecimen 

 obtained T found in the hills near Ironsides. I took it for j^upa jiento- 

 don, but perceiving differences with a lens, placed it under the micro- 

 scope, when its identity with V. boUesiana, to my great joy, at once 

 became apparent. Prof. Morse, to whom I sent it for examination, has 

 returned it as this species. J". boUesiana resemldes V. goiddii in the 

 number anil arrangement of the teeth, and /'. pentodon in color. It 

 has, howewer, only four whorls, and is smaller than even the former 

 species. My specimen is 1-G mm. in length and 1 mm. in diameter. 

 The diameter given by Morse, f^^X) ^^ ^^^ inch, is a little less. 



Verti(/o ovata, Sag — Is our commonest species. In moss froni 

 Dow's swamp it was very abundant, and I have taken it in great nuin- 



