THE MOUNT DESERT REGION 199 



P. (Euspira) heros var. triseriata (Say). (Natica triseri- 

 ata Say, 1826, Jour. Acad. Nat. Sci. Phila. ; Limatia triseriata 

 Gould, 1870, Inv. Mass., p. 340, fig. 610.) This is the common 

 form here and found in every dredging. Very similar dis- 

 tribution and bathemetrical range to P. heros in Canadian 

 waters. 



P. (Euspira) groenlandica (Moller). ( Natica groenlandica 

 Moller, 1842, Kr0yer's Naturh. Tidstkr. ; Lunatia groen- 

 landica Gould, 1870, Inv. Mass., p. 341, fig. 611.) Not very 

 common. Stations: D 6, 27, 52, 56, 71, 94, 95, 99. Not re- 

 ported from other places except Massachusetts Bay from 

 fishes. Common northward to Greenland. 



P. (Euspira) immaculata (Totten). (Natica immacidata 

 Totten, 1835, Amer. Jour. Sci.; Mamma? immaculata Gould, 

 1870, Inv. Mass., p. 344, fig. 614.) We did not find this com- 

 mon. Stations : D 14, 71, 83. Reported from Eastport to 

 Connecticut, Sable Island, Bay of Fundy, Gaspe Bay. 



Amauropsis Morch 

 A. isLANDiCA (Gmelin). (Nerita islandica Gmelin, 1790, 

 Syst. Nat.; Amauropsis helicoides Gould, 1870, Inv. Mass., 

 p.' 348, fig. 617.) Reported by Henderson off Otter Creek, 27 

 fathoms. One specimen from fish in Massachusetts Bay 

 (Gould), Georges Bank, Sable Island, very rare in good con- 

 dition (Whiteaves). 



Lamellariidae 

 Velutina Blainville 



V. LAEVIGATA (Liiiiie). {HcUx laevigata Linne, 1767, Syst. 

 Nat.; r. haliotoidae Gould, 1870, Inv. Mass., p. 334, fig. 605.) 

 Very common in tide pools and in deeper water. Stations: 

 D 5, 36, 39, 56, 112, 130. Woods Hole Survey dredged this 

 from 15 to 17 fathoms. Reported from Eastport and places 

 in Massachusetts. Locally as far as Greenland. 



V. UNDATA Brown, 1839, Mem. Wern. Nat. Hist. Soc. (F. 

 sonata Gould, 1870, Inv. Mass., p. 335, fig. 606.) Have taken 

 this form from fish maws, but did not dredge it. Not taken 



