206 MOLLUSKS FROM NORTH LABRADOR. 



? Buccinum plectrum Stimpson. 



Some woru but living specimens, collected July 17, 1882, at Davis In- 

 let, Labrador, may belong to this species or to the next one. Collector's 

 number, 111 ; Museum number, 73745. 



Buccinum undatum, L. var uudulatum Stm. 



Several living specimens found with the preceding. Museum num- 

 ber, 73746. 



Buccinum cyaneum Brugi6re. 



B. gronlandicum Auct., as of Chemnitz. 



One living specimen from Labrador's reef, Ungava Bay, near Fort 

 Chimo. Collector's number, 220; Museum number, 73747. 



As Chemnitz's name was not binomial it cannot properly take prece- 

 dence of that of Brugiere adopted by Stimpson. 



TEOCHIDJE. 



Margarita umbilicalis Brod. & Sow. 



Two specimens were taken from the stomach of a codfish, caught in 

 Nakvak Bay or inlet, October, 1883. The locality is about 90 miles 

 south of Hudson Strait. Collector's number, C157; Museum number, 

 73748. 



This well distinguished species is more northern in its southern lim- 

 its than M. helicina, and has been taken at Point Barrow, Cumberland 

 Inlet, Melville Peninsula, and East Greenland ; the latter locality from 

 specimens sent by the second German Polar expedition and catalogued 

 in their report as Trochus lielicinns. 



Dr. P^ul Fischer rejects the generic name Margarita because it had 

 been used by its author for the genus Margaritiphora, some years before 

 it was applied to the present group. While the practice of using a second 

 time names which have fallen into synonymy cannot be commended, it 

 does not seem as if it gave suflBcient ground for rejecting a name which 

 has never been adopted in the original sense, and has been used more 

 than half a century (and of late years universally) for the present group. 



Margarita helicina Fabricius. 



Common among the ooze in crevices of rocks at the Labrador's reef. 

 August 5, 1885. Collector's number, 233 ; Museum number, 73749. 



Universal in the Arctic in proper situations, but extending its range 

 much further south than the preceding species. 



ACMAEID^. 



Acmaea testtidinalis Miiller. 



From rocks at Eigolet, Labrador, July 5, 1882, Davis Inlet, July 17, 

 1882 ; and dead where dropped by the ravens on the uplands near Fort 

 Chimo, Ungava Bay, Labrador. Collector's numbers, 89, 110, 4043 ; 

 Museum number, 73750. 



