20 



Scala (Acirsa) borealis (Beck) Morch. 

 Scalaria borealis, Beck, 1841. 



Eastport, 10 to 40 fath., shelly bottom (Verrill & 



Smith). 



Polinices (Lunatia) heros (Say). 

 Natica heros, Say, 1822. 



Very common all along the coast, from low water- 

 mark to 50 fath., muddy and sandy bottoms. Used 

 by the fishermen for bait. 

 Polinices (Lunatia) triseriata (Say). 



Whole coast of Maine. 

 Polinices (Lunatia) groenlandica (Moller). 



Whole coast of Maine. 

 Polinices immaculata (Totten). 



Mamma? immaculata, Gould, 1870. 



Whole coast of Maine. 

 Polinices (Lunatia) levicula, Verrill, 1880. 



Casco Bay (Verrill, Kingsley) ; Eastport (Verrill) ; 



Gulf of Maine, 26 to 100 fath. (Ball). 

 Natica pusilla, Say, 1822. 



Casco Bay (Fuller, Mighels, Chickering) ; near East- 

 port, 17 fath. (Fuller). 

 Natica clausa, Broderip and Sowerby, 1829. 

 Natica consolidata, Cputhouy. 

 Natica borealis, Beck. 



Whole coast of Maine. 

 Acrybia flava (Gould). 



Natica flava, Gould, 1841; Stimpson, 1851. 

 Bulbus flavus, Gould, 1870. 



Portland Harbor (Fuller, in Portland museum) ; East- 

 port (Cooper in Gould's Invert. 2nd ed.) ; Grand 

 Manan, 50 fath. mud (Stimpson). 

 Amauropsis helicoides (Johnston), 1835. 

 Natica canaliculata, Gould, 1840. 



Off Otter Creek, Mt. Desert, 12 fath, sand (Hen- 

 derson). 

 Velutina zonata, Gould. 



Whole coast of Maine. 



