230 



The forty-two species above noted constitute the number of terres 

 trial mollusks now known to occur in this vicinity. That others may 

 be expected will appear from comparison with lists of the shells found 

 in the Eastern States, where the niolluscan fauna is most like our own, 

 and with the few imperfect Canadian lists which preceded Mr. Heron's. 

 In 1864 Morse catalogued from Maine forty-nine species. Vertigo 

 hollesiana, found subsequently, increased the number to fifty. With the 

 exception of Z. inoruatus, II. nitlJa, P. arinifera and Succinea obliqiia 

 (which is i-eplaced there by 6'. totleniana) all the shells found liere are 

 recorded from that State, Two of the Maine species, Alexia mjosotls 

 and Melamphus bidentatus, inhabit salt marshes and cannot be expected 

 inland. The remainder, with the exception of Mesodon denii/erus and 

 Zodgenites harpa, are European species introduced by commerce. One 

 of these, Tachea hoHensis, is said by Mr. Heron to have been taken near 

 Ottawa. It is, however, with another species mentioned by Morse — 

 Pupa musconmi — more usually a resident of the sea coast, though it 

 extends inland along the St. Lawrence at least as far as Quebec. The 

 occurrence of Poiaatia aspei'sa in Maine and of the slugs Arion ater 

 and Litnaxjlavu^ is merely accidental, and none of these species appear 

 to have obtained a. foothold here. Ilijalina cellaria, on the other hand, 

 has increased rai)idly and has extended far inland. Dr. Brodie found 

 it in Toronto last September, and about the same lime it was discovered 

 in Portland, Oregon, by Mr. H. E. Dore. It is certainly a species that 

 may be looked for here. Asio Z. Jmrpa, it appears to ])ass north of 

 Ottawa, being found at Gaspe, James' Bay, and on the north shore of 

 Lake Superior. M. dentiferas, one of the rarest American helices, can 

 be traced to nearer home. It appears in Adams' " Shells of Vermont," 

 a list including thirty-six species, and in a more accurate and extended 

 list kindly furnished me by Mr. E. M. Goodwin, of Hartland, in that 

 State. Mr. Whiteaves recorded it from St. Lambeit, Que., in 1861, and 

 it may be tlie .shell c.italogued from tne valley of the Ilonge as Helit 

 exoleta* by D' Urban in the same year. Dr. Bro lie found it last summer 

 in Muskoka. It accordinglv occurs both east and west of ur.. The 



•D'Urban's ;//. exohia is more likely to bo the toothed variety of n///'j/'i/i;-i'*', which, 

 since the above was written, I tound in the valley of the Licvrcs, in the County ot Ottawa, 

 near the High Rock phosphate luiiies.— F.U.L. 



