THE MOUNT DESERT REGION 197 



Mass., p. 283, %. 545; S. ohsciira Pilsbry, 1899, Manual 

 Conch. ) From sandy mud and hard bottoms between Green- 

 ings and Buttons Islands. Stations : D 25-27, 61, 62. Ee- 

 ported from Eastport to Stonington at various places up the 

 Atlantic coast, but not yet recorded from Greenland. 



Calltostoma Swainson 

 C. occiDENTALE (Migliels and Adams). [Trochiis occiden- 

 talis Mighels and Adams, 1842, Boston Jour. Nat. Hist., vol. 4, 

 p. 4, fig. 16. 'Casco Bay.' C. occidenfalis Pilsbry, 1889, 

 Manual Conch., Ser. 1, vol. 11, p. 393, pi. 37, figs. 2, 3.) Two 

 perfect specimens dredged at D 104 off Mount Desert Rock. 

 Reported from Casco Bay, Penobscot Bay, Eastport, Grand 

 Manan, in 25 to 40 fathoms in the Hake Bay. 



CTENOBRANCHIATA 



Pyramidellidae 



Odostomia Fleming 



0. MODESTA (Stimpson). (Chemnitzia mod est a Stimpson, 



1851, Proc. Boston Soc. Nat. Hist. ; 0. modesta Gould, 1870, 



Inv. Mass., p. 327, fig. 596). This small Odostomia with its 



four whorls is not a common form. Stations : D 23, 24, 72. 



AVoods Hole region, two records by Bartsch ; Duxbury. 



Cremula Iredale 

 C. eburn-ea (Stimpson). (Rissoa ehurnea Stimpson, 1851, 

 Shells of New England, p. 34, pi. 1, fig. 1 ; Rissoella? ehurnea 

 Gould, 1870, Inv. Mass., p. 297; Odostomia (Liostoma) 

 ehurnea, Bartsch, 1909, Boston Soc. Nat. Hist.; C. ehurnea 

 Iredale, 1915, Mai. Soc. London.) Fairly common in small 

 quantities. Stations : D 20, 22, 24, 27. Reported off Grand 

 Manan in 25 fathoms (Stimpson), Casco Bay, off Cape Ann, 

 Duxbury. One specimen reported from Gulf of St. Lawrence. 



CouTHOUYELLA Bartsch 

 C. STRiATULA (Coutliouy). {Pyramis striatulus Couthouy, 

 1838, Boston Jour. Nat. Hist. ; Menestlio alhula Gould, 1870, 



