36 (Bulletin of the (Natural History Society . 
62. — RISSOELLA? EBURNEA. — Stimpson. 
Rissoa eburxea. Stimpson (B). 
Grand Manan, twenty-five f., Stimpson (B). 
63. — SKENEA PLANORBIS.— (0. Fabr.), Forbes and 
Hanley. 
Bay of Fundy, very common, Verrill (F). 
64. — TROCHUS OCCIDENTALIS.— Mighels and Adams. 
Grand Manan, twenty-five to forty f., Stimpson (A), (B). 
65. — MARGARITA VARICOSA.— Mighels and Adams). 
Bay Chaleur, “ from the stomach of a cod-fish,” MiglieU 
and Adams , (Boston Journal Natural History, Yol. IV., 
page 46), Gould (E). 
66. — MARGARITA ACUMINATA.— Mighels and Adams. 
Grand Manan, forty f., Stimpson (B). 
67. — MARGARITA OBSCURA.— (Couth.), Gould. 
Eastport, six f., mud, Siimpsoii (A). Grand Manan, 
laminarian zone, Stimpso?i (A) (B). Common in 
Bay of Eundy from low water mark to one hundred 
f., Verrill (F). 
68. — Machceroplax obscura var Bella. — (Yerkr). 
“ This appears to be only a highly sculptured variety of 
M. OBSCURA,” Verrill (N). 
“The predominant form at Eastport, Me., and in the 
Bav of Fundy in ten to forty f., Ver- 
riir (N). 
