38 
PROCEEDINGS: BOSTON SOCIETY NATURAL HISTORY. 
Not rare, found in tide pools and under beach stones at low tide 
mark. Also dredged on Laminaria at station 16. The Margarita 
campanulata Morse, first described in Packard’s Invertebrate fauna 
of Labrador (’67) is now held by Morse, himself, to be the male of 
the M. helicina. There is considerable difference between sexes in 
the shape, and 75 percent of the specimens found are males. 
Margarita groenlandica (Gmelin). 
Margarita undulata , Gould, ’70, p. 280. 
Rather common, in company with the M. obscura. 
Margarita cinerea (Couthouy). 
Rather common with the preceding at stations 4, 6, 17, and 20. 
A few found in haddock. 
Margarita argentata Gould. 
Rare, a few dredged at station 17. Most of the specimens taken 
from haddock. 
Molleria costulata (Moller). 
Adeorbis costulata , Gould, '70, p. 278. 
Common at station 17. Also dredged dead at stations 22 and 24 
among broken shells. 
Puncturella noachina (Linne). 
Cemoria noacliina , Gould, ’70, p. 276. 
Very common; at stations 17 and 22 attached to stones and dead 
shells. A few specimens dredged with the others resemble the 
much elevated form described by Mighels as Cemoria princeps. 
POLYPLACOPIIOR A. 
Hanleyia mendicaria (Mighels and Adams). 
Chiton mendicarius, Gould, ’70, p. 263. 
Rare. This is a deep water species, though Professor Merrill 
(’74) in Explorations of Casco Bay, 1873, records specimens 
dredged in 30 fathoms. Only one specimen dredged at station 17, 
in 25 to 30 fathoms. 
