81 
of Br itish Mollusca . 
sprinkled with red in the same manner as the margin of the 
foot. Tentacles terminating above in a calyx-like expansion, 
formed of five leaflet-like points, from the middle of which 
rises the small, conical, smooth termination of the tentacle ; 
this conical process is of small size, not exceeding that of the 
divisions of the calyx. Branchial processes in the form of a 
waved raised curtain, surmounted by flat triangular papillae, 
passing down each side of the back and uniting behind ; the 
undulations of the curtain consist of three outwardly and four 
inwardly directed folds on each side ; the fold which is nearest 
the head is the largest ; the papillae on this fold are 18 to 
20 in number; the papillae on all the folds vary consider- 
ably in size, but there appears to be always one larger 
than the rest ; they are capable of contraction and dilatation, 
and are constantly changing their apparent dimensions while 
the animal is in motion ; they are banded with deep dark 
orange, while the small points in which they terminate are 
pale orange. Length inches. 
I dredged a single specimen of this very fine Nudibranch 
off Berry Head, Torbay, June 25, 1875. 
It approaches both L. flavidus, A. & H., and L. p or tlandi- 
cus , Thompson, but differs in many particulars, and espe- 
cially in the form of the tentacles, which have a very marked 
character in the small size of their apical portion, which pro- 
jects beyond the calyx-like sheath and is quite simple and 
shows no sign of ringing. The small size of these simple 
and non-laminated tentacles and their peculiar cut-edged 
sheath prevent my thinking that L. marmoratus is the young 
and L. Hancocki the adult of one species, as has been sug- 
gested by Mr. Garstang. 
Fam. 9. iEolididae. 
Subfam 1. jEolidinm. 
Genus 1. iEOLiS, Cuvier, 1798 ^AEolidia, 
Cuvier, 1817. 
Subgenus 1. iEoias, Cuv. (sens, strict.). 
117. AEolis papittosa (Linn.). 
Cumbrae and Shetland (A. M. N.) , Moray Firth (G. Mur- 
ray) , Hilbre Island ( Byerley ), North Wales and Isle of Man 
( Herdman ), St. Andrews (McIntosh) , Plymouth {Garstang), 
Firth of Forth ( McBain fyc.). 
Distribution . W. and S.W. France {Fischer) , Kiel ( Meyer 
Mobius ), Denmark (Morch), Sweden ( Loren ), Norway and 
Ann. & Mag . N. Hist. Ser. 6. Vol. vi. 6 
