29 



Lottia alveiis. Very common. 

 Dentalium dentale.* Rare. 

 Cemoria Noachina.* Rare. 



Crepidula fornicata. Abundant. 



Crepidula plana. Abundant. 



Crepidula convexa. Abundant in Lynn harbor. 



Crepidula glauca. 



Bulla insculpta. In the summer of 1849 I found this 

 species rather common, in Lynn harbor. I have looked for 

 it in vain, since ; it seems to have entirely disappeared. 



Bulla triticea.* Frequent in deep water in various parts 

 of the bay. 



Bulla puncto-striata.* OffScituate. Rare. 



Bulla caniculata.* Off Scituate, and in other localities, 

 but rare. 



Bulla Gouldii.* OffScituate. 



Bulla debilis.* Off Cape Ann. Rare. 



Bulla lineolata.* ) From several places in the Bay, but 



Bulla obstricta.* J no where abundant. 



Helix. The species, in this list, may be found in an 

 hour's diligent search on any of the wooded hill sides of 

 Swampscott, which have a southern aspect. Some species 

 of Pupa may be found in company with them, but I have 

 been unable to determine them from the want of gloss (epi- 

 dermis.) 



Helix albolabris. 



H. alternata. 



H. arborea. 



H. indentata. 



H. lineata. 



H. labyrinthica. 



H. minuscula. 



H. pulchella. 



H. striatella. 



H. sp : not determined. 



Bulimus lubricus. Sometimes met with in company 

 with the above species of Helix, but sparingly. 



Succinea campestris. Common with the Helices. 



