14 AMERICAN JOURNAL 



tapering tube, with a crenulate orifice. Foot oblong oval, rounded 

 behind, truncately rounded in front, much smaller than the 

 mantle. 



The upper surface is beautifully mottled with different shades- 

 of brown and grey, the former color assuming two dorsal longi- 

 tudinal rows of large cloud-like spots. 



Dorsal tentacles pale, tipped with white. The under surface 

 of the mantle and foot is pale cinereous, the former with 

 crowded small whitish yellow spots, which become more scattered 

 towards the body, and maculated with irregular chocolate spots,, 

 those along the margin running into one another. 



Locomotive disk mottled with whitish yellow and closely spot- 

 ted with pale chocolate brown. Upper surface of the foot mot- 

 tled with pale brown. 



Length, six and a half inches. 



Habitat, Island of Huaheine. 



Remarks. (While in confinement the animal cast off large 

 portions of its mantle, in the same manner as species of 

 Ilarpa cast off their foot. A. G.) 



Doris sordida, Tease. Plate 4, fig. 2. 



Animal smooth, subpellucid, elongate oblong, convex above,, 

 rounded at either end, margins thin, rather widest on its ante- 

 rior half. Dorsal tentacles well developed, elongate, conical, 

 slightly swollen, erect on stout peduncles, laminae very oblique,, 

 not deeply cut, retractile into simple cavities. Labial tentacles,, 

 none ; head subquadrate. 



Branchial star inserted far back, projecting a short distance 

 beyond the margin of the mantle ; plumules six, arborescent, 

 retractile into a simple cavity. Vent prominent. Foot narrow,, 

 elongate, fissured and truncately rounded in front, rounded be- 

 hind, and projecting beyond the mantle. 



Color blackish slate, with a few scattering opaque white spots- 

 Tentacles with brown laminte and tipped with white ; beneath 

 paler. Foot pale brownish. 



Length, one and a half inch. 



Habitat, Tahiti. 



Station, (among sea-weed and under stones at low water mark- 

 Motions rather lively. A.-G.) 



Doris fuscescens, Pease. Plate 4, fig. 3. 



Animal oblong oval, somewhat flaccid, subpellucid ; dorsal 

 region convex, rounded on either end, widest at the middle,, 



