388 PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 



July and August, on filamentous algfe, especially Ceramium rv.hrnin, 

 growing on the mooring buoys and piles of wharves in the harbor. 



In confinement it often leaves the algfe and creeps at the surface of 

 the water, foot upward. 



The eggs of this species were laid in confinement, July 24, at New- 

 port, E. I. They form a long, narrow, oblong or strap-shaped, white 

 mass, attached by one edge to filamentous algiej 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 j)apillie. Foot broad, elongated, tapering 

 and acute posteriorlj- ; 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 i^apillae or warts. No eyes could be detected. Dor- 

 sal papillce arranged in numerous transverse, oblique rows, each of eight 

 to ten or more papillie (except posteriorly); they are small and much 

 crowded along the sides 5 the upi^er ones are much longer, stout, mostl3^ 

 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 papillae to another and connecting with their 

 nuclei ; the dorsal papilhie 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™"' 

 (.G inch); of longest dorsal papillie, 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 distiiict denticles on the edge, rather 

 large, wide at the base, which is emarginate, the outer lobe extending 

 further bacli:, inner edge slightly wavy and uneven, but not denticulate. 



Off" Cape Cod, in 75 fathoms, mud and broken sliells, 1879. One speci- 

 men only. 



In form and color this species resembles Q. salmonacea, but the latter, 

 which occurs at Eastport, Me., has the dorsal papillae 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, Atncr. Journ. Sci., xvii, p. 314; Trans. Conn. Acad., 

 V, pi. 42, lig. 14. 



The dentition of this species is peculiar, but agrees better with that 



