OF CONCHOLOCJY. 13 



minent. Head without labial appendages. Foot oblong elon- 

 gate, much narrower than the mantle, and during locomotion 

 projecting but little behind the body. 



Color pale dusky brown, and a few scattering remote round 

 pale dots; the mantle is edged with blackish brown, and an 

 intramarginal carmine band. Tentacles pale, tipped with opaque 

 white — the laminae brown. Branchiae pale, tinged with brown. 

 Beneath paler than above, the hinder portion of the foot stained 

 with carmine. 



Length, one half of an inch. 



Habitat, Tahiti. 



Station, (under stones at low water mark. A. G.) 



Doris cinerosa, Pease. Plate 5, fig. 1. 



Animal subpellucid, oblong oval, coriaceous, similarly rounded 

 at either end. Mantle entirely covering the foot, convex above 

 and covered with closely set asperities like the pile on velvet. 



Dorsal tentacles remote, erect, short and stout, on short, very 

 stout peduncles ; laminae very oblique, rather coarse, and retrac- 

 tile into simple cavities. Labial tentacles stout, tapering and 

 recurved. Branchial star pale, small, and retractile into a com- 

 mon simple cavity ; plumules six, arborescent, tripinnate. Foot 

 elongate oval, rounded behind, truncately rounded and fissured 

 in front. Color pale grey, dotted with black. Dorsal tentacles 

 pale olivaceous, tips white. Under surface same as the upper, 

 the spots being visible through the substance, as is also the vis- 

 cera. 



Length, three-fourths of an inch. 



Habitat, Island of Huaheine. 



Station, (under stones at low water mark. A. G.) 



Doris nubilosa, Pease. Plate 6. 



Animal flaccid, oblong oval; mantle convexly rounded above, 

 widest on the posterior half, rounded at either end, covering the 

 foot ; margins thin and irregularly minutely gashed. Upper 

 surface covered with closely set unequal sized soft papillae, among 

 which are interspersed small tentacular processes. 



Dorsal tentacles small, ovate, very finely and obliquely lami- 

 nate, retractile into tubular papillose cavities. Labial tentacles 

 small and finger-shaped. Branchial star large, not as wide as 

 the mantle, plumules six, quadripinnate, recumbent, broad, and 

 retractile into a common cavity. Vent, a prominent slender 



