r 
388 PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 
July and August, on filamentous alge, especially Ceramium rubrum, 
growing on the mooring buoys and piles.of wharves in the harbor. 
In confinement it often leaves the alge and creeps at the surface of 
the water, foot upward. 
The eggs of this species were laid in confinement, July 24, at New- 
port, R. I. They form a long, narrow, oblong or strap-shaped, white 
mass, attached by one edge to filamentous alg; the eggs are arranged 
in numerous rows. 
Coryphella nobilis Verrill, sp. nov. 
A large and elongated species, with stout dorsal tentacles and large, 
flattened, pale-salmon dorsal papille. Foot broad, elongated, tapering 
and acute posteriorly; anterior angles considerably elongated, in the 
form of acute tapering processes, having a distinct longitudinal groove 
or fold. Head rather small, rounded, in front slightly convex or nearly 
straight, lower side concave. Oral tentacles very stout, flattened, gib- 
bous near the end, with a small, somewhat upturned, round, acute tip. 
Dorsal tentacles (rhinophores) very large and stout, arising close to- 
gether, longer than the oral ones, tapered, subacute, thickly covered 
with small, conical papilla or warts. No eyes could be detected. Dor- 
sal papille arranged in numerous transverse, oblique rows, each of eight 
to ten or more papille (except posteriorly); they are small and much 
crowded along the sides; the upper ones are much longer, stout, mostly 
flattened, widest beyond the middle, tapering to the lanceolate tip. 
Color of foot and body translucent white; on the back there are 
visible, through the integument, salmon-colored vessels, running from 
one group of dorsal papille to another and connecting with their 
nuclei; the dorsal papille are pellucid white externally, with a pale- 
salmon nucleus, becoming paler and whitish near the tip; dorsal tenta- 
cles pale yellowish green; oral ones pellucid white. 
Length, about 63°", or 2.5 inches; length of dorsal tentacles, 15™™ 
(.6 inch); of longest dorsal papilla, 12" (.5 inch). 
The odontophore has a central row of large teeth, with a moderately 
prominent, acute, central denticle, and usually six smaller denticles on 
each side; lateral teeth without distinct denticles on the edge, rather 
large, wide at the base, which is emarginate, the outer lobe extending 
further back, inner edge slightly wavy and uneven, but not denticulate. 
Off Cape Cod, in 75 fathoms, mud and broken shells, 1879. One speci- 
men only. 
In form and color this species resembles C. salmonacea, but the latter, 
which occurs at Eastport, Me., has the dorsal papilla more crowded, 
and its dentition is very different, for the lateral teeth are strongly denti- 
culated along the edge to near the tip. 
Coryphella Stimpsoni Verrill. 
Cuthona Stimpsoni Verrill, Amer. Journ. Sci., xvii, p. 314; Trans. Conn. Acad., 
v, pl. 42, fig. 14. 
The dentition of this species is peculiar, but agrees better with that 
