368 REPORT OF COMMISSIONER OF FISII AND FISHERIES. [662] 
TRACHYDERMON RUBER Carpenter. Plate XXV, fig. 166. 
Chiton ruber Lowe, Zov). Journ., vol. ii, p. 101, Plate 5, fig. 2 (t. Gould); Gould, 
Invert., ed. i, p. 149, fig. 24; ed. ii, p. 260, fig. 523, Leptochiton ruber H. and 
A. Adams, Genera, voli, p. 473; this Report, p. 399. 
Off New London, Connecticut, to the Arctic Ocean and northern 
coasts of Europe. Rare and local in the colder outer waters south of 
Cape Cod. Off New London, 8 fathoms; off Watch Hill, 5 fathoms, 
Stonington (Linsley). Very common in Casco Bay and Bay of Fundy, 
from low-water mark to 40 fathoms. 
Ds. Carpenter assures me that this species should be referred to 
Trachydermon. 
Linsley records “ Chiton fulminatus Couth.” (= C..marmoreus Gould, 
Invert., ed. ii, p. 261, fig. 524) as froin cod-fish taken off Stonington, Con- 
necticut, but as it has not been confirmed from south of Cape Cod, this 
must be regarded as a doubtful identification. This species is found 
from Massachusetts Bay northward to the Arctic Ocean and northern 
coasts of Europe. It is common in the Bay of Fundy, from low-water 
mark to 40 fathoms, on “nullipore” (Lithothamnion). 
“ Chiton albus” (= Trachydermon albus, t. Carpenter) has been men- 
tioned as from this region, but probably erroneously. White specimens 
of C. apiculata are often mistaken for it, when superficially examined. 
The genuine albus is a northern species, with about the same distribution 
as the preceding. It is abundant in the Bay of Fundy, from low-water 
to 80 fathoms. 
PULMONATA. 
MELAMPUS BIDENTATUS Say. Plate XXV, figs. 169, 169a. (p. 463.) 
Journal Acad. Nat. Sciences, Philadelphia, vol. ii, p. 245, 1822; Gould, Invert., od. 
ii, p. 467, fig. 721. Auricnla bidentata Gould, Invert., ed. i, p. 117, fig. 131. Me- 
lampus corneus Stimpson, Shells of New England, p. 51, 1851. 
Massachusetts Bay to Florida, and along the northern shores of the 
Gulf of Mexico to Texas. Very common on the shores of Vineyard 
Sound, Buzzard’s Bay, Long Island, and Long Island Sound. Yossil in 
the Post-Pliocene of South Carolina. 
ALEXIA MYOSO'TIS Pfeiffer. Plate XXV, fig. 168. (p. 383.) 
Pfeiffer, Mon. Auric. Viv., p. 148, (t. Binney); Gould, Invert., ed. ii, p. 463, figs. 
718, 719. Auricula myosotis Draparnaud, Tabl. Moll. Fr., p. 53. Auricula den- 
ticulata Gould, Invert., ed. i, p. 199, fig. 129 (non Montfort). 
New Jersey to Nova Scotia; also on the Atlantic and Mediterranean 
coasts of Europe. It is,common at Eastport, Maine ; Portland, Maine; 
and at the mouth of West River, near New Haven, Connecticut; also 
near New York City. 
TECTIBRANCHIATA. 
BULLA SOLITARIA Say. Plate XXV, fig. 161. (p. 371.) 
Journal Acad. Nat. Sciences, Philadelphia, vol. ii, p. 245, 1822; Binney’s Say, p. 
84; Gould, Invert., ed. i, p. 162, fig..92; ed. ii, p. 222, fig. 513. Bulla insculpta 
Totten, American Journ. Science, vol. xxviii, p. 350, fig. 4, 1835. 
Massachusetts Bay to South Carolina. Common in the muddy lagoons 
