176 



Dawson); low-water at Pointe du Chene, Shediac Bay, N.B. (Whiteaves) ; 

 Bedeque, P.E.I. , common (Rev. H. W. Winkley). Not found on the coast 

 of Maine, nor in the Bay of Fundy (Verrill). In the Bulletin of the Museum 

 of Comparative Zoology at Cambridge, Mass., for April, 1899, vol. xviii., p. 

 257, Dr. Dall says that this shell is identical with the Turritella alternata 

 of Say. 



Cerithiopsis costulata (MoUer). 



Turritella ? costulata, Moller (1842. ) 

 Cerithium arcticum, Miirch (1857). 

 Cerithiopsis costulata, G. O. Sars (1878). 



" A good living example of this arctic species was dredged by me, in the 

 Bay of Fundy, in 1870. It may be easily distinguished by the elevated 

 spire, having the whorls crossed by regular and strong, rounded ribs, nearly 

 as in Scalaria, with a basal carina, in line with the outer lip, and with 

 revolving lines crossing the furrows between the ribs. The canal is short, 

 but deeply cut and slightly recurved " ^ (Verrill). The two specimens from 

 the deep sea mud in the Gulf of St. Lawrencp, that were identified with this 

 species by the writer in 1873, are the types of Verrill's Lovenella Whiteavesii, 

 described in 1880, the name of which has since been changed to Cerithiella 

 Whiteavesii. 



Cerithiopsis Greenii (Adams). 



Cerithium Greenii, C. B. Adams (1838). 

 Bittium Greenii, H. and A. Adams (185S). 

 Cerithiopsis Greenii, Verrill (1873). 



According to the Rev. H. W. Winkley, f tids species is not infrequent on 

 the oyster beds at Summerside, P.E.I., and it occurs also at Bedeque. 



Cerithiella Whiteavesii, Verrill. 



Cerithiopsis costukdus, Whiteaves (1873) ; iio.i Turritella costulata, 



Moller. 

 Lovenella Whiteavesii, Verrill (1.^8)). 

 Cerithiella Whiteavesii, Verrill (18S2). 



Two living examples of this shell were dredged by the writer in 1873, 

 in the Gulf of St. Lawrence, between the Island of Anticosti and the 

 Gaspe peninsula, one in 110 and the other in 200 fathoms. 



* Transactions of the Connecticut Academy of Arts and Sciences, vol. v., p. 522. 

 t Bulletin of the Natural History Society of New Brunswick, No. vii. (1888) p. 70. 



