Sg 8 cy Sl a a ae a eR caves 
A. E. Verrill on New England Nudibranchiata. 407 
deeply frilled, much subdivided, bipinnate, the subdivisions fine 
and slender. Foot very broad, in extension projecting back be- 
yond the mantle about a quarter of an inch, slightly tapering, 
rounded and oeney notched at the end. Oral disk or veil cres- 
cent-shaped, the front a little prominent, the sides extended 
backward and Senin a curve continuous with that of the foot. 
lor dark purplish brown, sprinkled with white specks; ten 
tacles deep brown, specked ‘with white, tips yellowish ; gills 
purplish at base, the edges and tips yellow; foot similar in color 
to mantle, but lighter. 
Eastport, Me., at low-water mark, under stones, Aug. 19, 1868. 
Onchidoris tenella. 
Doris tenella Ag., in Gould, Invert. of Mass., Ed. 2, p. 229, Pl. xx, figures 289, 
290, 293, 1870. 
Specimens of this rare and imperfectly known species were 
obtained ae y stones in a large pool at low-water mark, near 
Eastport, 
The largest one was ‘85 of an inch long, and ‘20 to 25 
broad, acco: to the position. The outline is oval, elliptical, 
or oblong, in ifferent states of extension, and the edges of the 
mantle are often rolled inward. The back is ee pee convex, 
the surface Ae er covered with more conical papille, which 
are strengthened by numerous minute white s spicula. The 
Sah are rather tig, oblong, se paar tapering, with nume- 
us transverse laminw, which cover nearly the whole length, 
the tip with a leetadl eens apilla ; the base is surroun a 
short sheath, with the eg ivided into five small conical 
papille or teeth, the two anterior ones largest. Branchiz nine, 
seven oes a pie with two very small ones posteriorly ; the 
thick, lanceolate, with short late lob 
In eee center of the branchial circle there is a small bro 
e oral disk is short and broad, subtriangular, with a very 
obtuse angle in front. 
Color of the upper surface yellowish white, the papillz mostly 
A with yellow, om some with flake-white ; tentacles ry 
ow with lighter tips; branchie yellowish white, » eigen ee 
eed with sig fs ow, the yellow tint co po et “om 
Contraction ; ay yellowish white; mouth edge age ool di disk 
bright yellow. 
Pe cng ay PARE a 232, PL xx, figures 292, 295. 
This species ae under “ve same circumstances as the 
preceding, and mo e color was erally 
clear mee, pm dh tinged with pale sulphur-yellow, in some 
parts. 
