of British Molhisca. 81 



sprinkled with red in the same manner as the margin of the 

 foot. Tentacles terminating above in a calyx-h'ke 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 j^^'ocesses 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 papillse on this fold are 18 to 

 20 in number; the papilla? 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. Lencjth 2j inches. 



I dredged a single specimen of this very fine Niidibranch 

 off Berry Head, Torbay, June 25, 1875. 



It approaches both L.jlamdus^ A. & H., and L. portlandi- 

 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. Gars tang. 



Fam. 9. JEolididaB. 



Subfam 1. ^oLiDiN^. 



Genus 1. ^OLIS, Cuvier, 179^ = ^olidia, 

 Cuvier, 1817. 



Subgenus 1. ^olis, Cuv. (sens, strict.). 

 117. JEolis 2)o2nllosa (Linn.). 



Cumbrae and Shetland {A. M. N.), Moray Firth (G. Mur- 

 ray), Hilbre Island [Byerley), North Wales and Isle of Man 

 (Herdman), St. Andrews {M'Intosli), Plymouth {Garstang), 

 Firth of Forth (Mci^am ^c). 



Distribution. W. and S.W. Yrnnco, {Fischer) , Kiel [Meyer 

 ^ Mobnis), Denmark {March), Sweden [Loven), Norway and 

 Ann. i&) Mag. N. Hist. Ser. 6. Vol. vi. 6 



