THE MOUNT DESERT REGION 209 



costata Verrill, 1882, Trans. Conn. Acad. ; B. decussata Gould, 

 1870, Inv. Mass., p. 354, fig. 623.) Reported from Eastport, 

 Frenchmans Bay, Casco Bay. 



B. EXARATA (Moller). {Defrancia exarata Moller, 1842, 

 Kr0yer's Naturh. Tidskr. ; B. concinnula Verrill, 1882, Trans. 

 Conn. Acad., vol. 5, p. 468, pi. 43, fig. 15.) Blaney reports 

 rare. Reported from Casco Bay, Gulf of Maine, off Cape Cod, 

 Massachusetts Bay. 



B. BLANEYi Bush. (Bush, 1909, Nautilus, vol. 23, p. 61, 

 fig. 1.) Taken by Dwight Blaney and named for him. 



Tornatinidae 

 Retusa Brown 



R. PERTENuis (Mighels). {Bulla pertenuis Mighels, 1826, 

 Boston Jour. Nat. Hist. ; Utriculus pertenuis Gould, 1870, Inv. 

 Mass., p. 218, fig. 509; R. pertenuis Pilsbry, 1893, Manual 

 Conch.) By carefully shifting sandy mud from the dredge 

 and washing it out this very small animal is found. Common 

 in the inner Bay. Stations : D 11-13, 33-37, 39, 77-79. Re- 

 ported from Casco Bay, Massachusetts Bay, Duxbury, Mass.; 

 Grand IManan, Northumberland Strait and Gaspe Bav, Strait 

 of Belle Isle. 



R. GouLDii (Couthouy). (Bulla gouldii Couthouy, 1839, 

 Boston Jour. Nat. Hist.; Utriculus gouldii Gould, 1870, Inv. 

 Mass., p. 217, fig. 508; B. gouldii Pilsbry, 1893, Manual 

 Conch.) Larger and more white than the preceding form, it is 

 also found in sand and mud and inhabits the inner Bay. Sta- 

 tions: D 33-37, 78. Reported from Casco Bay, Stellwagens 

 Bank, 15 to 25 fathoms; from fish taken off Massachusetts 

 coast and Georges Bank. The only Canadian report is Anna- 

 polis Basin, N. S., seldom. (Verkruzen). 



Scaphandridae 



DiAPHANA Brown 



D. DEBiLis (Gould). (Bulla dehilis Gould, 1840, Amer. Jour. 



Sci. ; Amphysphyra pellucida Verrill, 1881 ; D. dehilis Gould, 



1870, Inv. Mass., p. 216, fig. 507.) Not commonly found. 



