b THE NAUTILUS. 



The character of the soil, and the copious moisture from dews and 

 fogs are conducive to very rank growth of several species of maritime 

 plants, affording suitable conditions for the mollusca enumerated. 



During my visits to the islands, shell collecting has been entirely 

 secondary. Yet the isolation of the islands lends so much interest 

 to the collection that the following records do not seem entirely 

 superfluous, especially as a thorough investigation is not practicable 

 at present : 



Helix hortensis Miiller. In June, 1896, I found this species in 

 great abundance on Seal Island. They inhabit the rank vegetation 

 toward the western end. The yellow, unbanded phase predominated, 

 only three or four banded ones being found. Some young speci- 

 mens having but two and a half whorls were also found on the occa- 

 sion of this visit. I have not found it on any other island of the 

 group. It was recorded by Mr. C. W. Johnson from Seal Island in 

 THE NAUTILUS for November, 1906, page 77. 



Vallonia costata Miill. Rather abundant on Seal Island in 1896 

 among rank herbage and driftwood. 



Pupilla muscorum Linn. Four specimens were found with the 

 last-named species. They are but 3 millimeters long, half a milli- 

 meter shorter than specimens taken on the adjacent mainland. One 

 is a rich brownish, the others opaque white, all edentulous. 



Cochlicopa lubrica Miill. One specimen was found under a log, 

 stranded high on Matinicus Rock, August, 1905. 



Vitrina limpida Gould. Found rather plentiful among stranded 

 chips and rank vegetation on Matinicus Rock, July, 1903. 



Zonitoides arborea Say. Matinicus Rock. Three specimens 

 under logs, stranded high above normal tide mark, August, 1905. 



Agriolimax agrestis Linn. Several specimens were found under 

 logs and stones or hidden by rank vegetation on Matinicus Rock, 

 August, 1905. 



Pyramidula alternata Say. A single dead and broken shell was 

 found at the northern part of Matinicus Island, August, 1905. 



Pyramidula striatella Anth. Common with the other small species 

 on Seal Island, June, 1896. 



Succinea obliqua totteniana Lea. One found on Matinicus Rock, 

 July, 1903. 



Succinea avara Say. Two obtained at Seal Island, June, 1896, 

 and one very small one at Matinicus Rock, July, 1903. 



