26 
half of its length, along the middle of the plume two rows of alter- 
nate granules, Foot large, oval, reaching the margins of the mantle 
laterally and projecting a little posteriorly. Colour above pale pur- 
plish, with much darker granules, which gives it a beautifully reticu- 
lated appearance ; beneath paler than above; disk of the foot light 
purplish-grey. 
22. Doris SETOSA. 
Form elongate-oval, smooth, similarly rounded at both extremities, 
and slightly widest a little posterior to the middle. Mantle con- 
cealing the foot, convexly rounded above and rather densely pilose, 
with slender filamentous processes. Branchiz rather large, ten- 
pinnate, erect, converging, surrounding the vent, and retractile in a 
common cavity. Dorsal tentacles large, stout, ovate, with their tips 
obtusely mucronated, coarsely and strongly obliquely lamellated, and 
retractile into simple cavities. Foot oblong, rounded at both ends, 
and not projecting beyond the edges of the mantle. Labial appendages 
elongate and cylindrically tapering to a point. Colour yellowish- 
grey, with numerous indistinct black points and abbreviated lines on 
the dorsal region. Tentacles dull yellow. Branchiz same colour 
as the tentacles. Beneath, the mantle minutely speckled with dusky. 
Disk of foot translucent, so much so that the viscera are visible, 
slightly tinged with yellow anteriorly. 
Length +4 of an inch. 
Its pilose appearance and mucronated tentacles readily distinguish 
it from any other species found in these seas. 
23. DorIS EXCAVATA. 
Body oval, rigid, scabrous, convexly rounded above, widest in the 
middle, and obtusely rounded at both ends. Mantle concealing the 
foot, margins thin. Dorsal region with promineut, crowded, irre- 
gular acute ridges and granules, several subcircular, large, elevated 
acute ridges, which form deep concave pits. Branchial plumes small, 
seven, arising from a prominent circular rim. Dorsal tentacles re- 
mote, mucronated at the tips with blunt papillz, and retractile into 
slightly prominent sheaths, which have crenate edges. Oral tentacles 
small, conical. Mouth prominent. Foot oblong-oval, slightly trun- 
cated in front. Colour light orange-red, with large patches of a light 
yellowish fawn. Branchiz light brown, and powdered with white. 
Dorsal tentacles fawn, and densely freckled with white; beneath 
uniform light orange-red. The posterior portion of the body is pro- 
vided with a cylindrical muscular attachment, uniting the mantle 
with the foot. 
Length 2 inches. 
24. Doris RETICULATA. 
Body rigid, oval, convexly rounded above. Mantle entirely con- 
cealing the foot, granulose laterally, the dorsal region remotely and 
reticulately ridged ; margins thick, and very shghtly undulated. 
