principally marine, found on the South Coast of Devonshire. 17 
is not readily discovered, but when dilated is very conspicuous, 
and a regular pulsation is discernible. 
Length two or three inches. Not uncommon. 
From the points of the papille an extremely viscid secretion - 
is discharged, that sometimes envelops the whole animal. 
Of the British species this comes next to Doris argo in size, 
and is not less known on the south coast of Devon. 
DORIS QUADRICORNIS. 
Tas. IV. Fig. 4. 
Body ovate, mottled brown and white; along each side an 
obsolete row of tubercles, somewhat dilatable, extending from 
the tentacula to the vent: tentacula four, long, both pairs ori- 
ginating from the upper part, and approximating; the anterior 
shortest setiform, inclining forwards ; the others filiform, reflecting 
backwards, the same colour as the body: vent situated near the 
extremity of the back, surrounded with eight or nine branched 
appendages. 
Length three eighths of an inch. Rare. 
Doris PENNIGERA. 
Tas. IV. Fig. 5. 
Body oblong, acuminated almost to a point at the posterior 
extremity, covered with small spots of bright orange and black 
on all the upper parts; the black markings are smallest, and 
appear radiated under a lens: the anterior end is sub-bifid, ex- 
tending each side into an angular lobe: tentacula two, sub-cla- 
vated and perfoliated ; these originate on the upper part some 
distance from the anterior end, and each is nearly surrounded 
by a sort of bipartite wing: the vent is on the back, furnished 
VOL. XI. D with 
