Shells found in Essex County. 129 



Cumingia tellinoides, G. One living specimen in tide-mill 

 pond, Salern, Tr. 



Cyclas dubia, G. Lynn, P. 



Cyclas partumeia, G. Lynn, P. Salem, Tr. 



Dentatium dentale, G. Marblehead harbor by dredging 

 fifteen to twenty fathoms. W. Lynn beaches, Tr. 



Fusus decemcostatus, G. Off Nahant, T. & H. St. Sh. 46. 

 Fusus harpularius, G. Dredged at Lynn, T. Salem, W. 



St. Sh. 49. Near Nahant, Couth. G. 291. 

 Fusus Islandicus, G. Tritonium Islandicum, Loven. Off 



Lynn, T. & H. St. Sh. 46. Also Variety pygmaeus, G. 



Trytonium pygmceum, St. Sh. 46. Salem harbor. W. 



HELICES. The following list of Helix proper was fur- 

 nished by Mr. S. Tufts, jr. He detected all the species on 

 wooded hill sides fronting a southern aspect at Swampscot, 

 Lynn. Mr. True has found the same in the limits of Sa- 

 lem, with one or two other species. 



Helix albolabris, G. 



Helix alternata, G. 



Helix arborea, G. 



Helix electrina, G. 



Helix exigua, G. 



Helix hortensis, G. Helix subglobosa, Binney, Bost. 

 Journ., vol I. pi. 17. On Eagle Island, Salem harbor, 

 occurring abundantly with H. H. alternata and albola- 

 bris. 



Helix indentata, G. 



Helix labyrinthica, G. 



Helix lineata, G. 



Helix minuscula, G. 



Helix pulchella, G. 



Helix chersina, G. Salem, Tr, 



Helix Sp. Salem, Tr. 



