THE MOUNT DESERT REGION 



203 



Mass., p. 306, fig. 576.) This species prefers quiet shores, 

 pools, and marshes, and is widely distributed. Entire New 

 England coast. 



Lacuna Turton 



L. viNCTA (Montagu). {Turho vinctus Montagu, 1803, Test. 

 Brit.; L. vincta Gould, 1841, Inv. Mass., p. 262, fig. 168.) A 

 very common form from seaweed, in shallow water water and 

 tide pools at spring tides. Woods Hole Survey. Verrill 

 states that this species occurs at depths of 4 to 5 fathoms, but 

 this is certainly not usual, for the Woods Hole Survey dredged 

 it from only four stations and we not at all. To and including 

 Labrador Atlantic coast. 



L. VINCTA FuscA. (Gould, 1870, Inv. Mass., p. 263, fig. 169 ) 

 Common along the New England coast; associated with the 

 above. 



Turritellidae 

 TuRRiTELLA Lamarck 



T. EEOSA Couthouy. (Couthouy, 1838, Boston Jour. Nat. 

 Hist. ; T. erosa Gould, 1870, Inv. Mass., p. 317, fig. 585.) The 

 only place we dredged this form was at station D 152, on 

 hard and gravel bottom, at a depth of around 160 feet. They 

 were plentiful. Entire Canadian Atlantic coast. 



TuRRiTELLOPSis G. 0. Sars 

 T. ACicuLA (Stimpson). (Stimpson, 1851, Boston Soc. Nat. 

 Hist.; Gould, 1870, Inv. Mass., p. 319, fig. 588.) Fairly com- 

 mon on mud bottoms when the mud is not too soft. Stations : 

 D 25-28. Eeported from near Eastport, Casco Bay, and 

 places in Massachusetts. Same distribution as T. erosa. 



Trichotropidae 



Trichotropis Broderip 



T. borealis Broderip and Sowerby. (Broderip and Sow- 



erby, 1828, Zool. Jour. ; T. costellatus Couthouy, 1838, Boston 



Jour. Nat. Hist. ; T. horealis Gould, 1870, Inv. Mass., p. 390, 



fig. 651.) This most interesting form is found on sand, shell. 



