﻿388 PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 



July and August, on filamentous alg?e, especially Ceramium ruhrum^ 

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



In confinement it often leaves the algie and creeps at the suriace of 

 the water, foot upward. 



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

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

 mass, attached by one edge to filamentous alga? ; the eggs are arranged 

 in numerous rows. 



Coryphella uobilis Yerrill, sp. nov. 



A large and elongated species, with stout dorsal tentacles and large, 

 flattened, pale-salmon dorsal papilhe. Foot broad, elongated, tapering 

 and acute jiosteriorly ; 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 iiapilhe or warts. No eyes could be detected. Dor- 

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

 to ten or more papill.ie (excei^t 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 Avhite; on the back there are 

 visible, through tlie integument, salmon-colored vessels, running from 

 one group of dorsal papilla? to another and connecting with their 

 nuclei ; the dorsal papilliie are jjellucitl white externally, with a i^ale- 

 salmon nucleus, becoming paler and whitish near the tip 5 dorsal tenta- 

 cles pale yellowish green ; oral ones i)ellucid white. 



Length, about G3'"'", or 2.5 inches ; length of dorsal tentacles, 15""" 

 (.G inch); of longest dorsal pa])illie, 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. 



Oft' Cape Cod, in 75 fathoms, mud and broken shells, 1879. One speci- 

 men only. 



In form and color this species resembles C. ftalmonacea^hnt the latter, 

 which occurs at Eastport, Me., has the dorsal papillfe more crowded, 

 and its dentition is very ditterent, for the lateral teeth are strongly- denti- 

 culated along the edge to near the tip. 



Coryphella Stinipsoni Vorrill. 



Cnthona St}m2)soni Verrill, Amer. Jonrn. Sci., xvii, p. 314; Trans. Conu. Aciul., 

 v,pl. 42, fig. 14. 



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



