Dr. Johnston on Scottish Mollusca. 123 



than the superior ones, which have the eyes behind. Three 

 filiform branchiae in each bundle " Fleming. 



5. E. plumosa, "a single row of simple linear branchiae on 

 each side." Fleming, 



Tritonia plumosa, Fleming in Edin. Encyclop. xiv. 619. — Eolida plumosa, 



Flem. Brit. Anim. 285. 

 Hah. " In Zetland," Dr. Fleming. 



Desc. " Length about half an inch. The superior tenta- 

 cula pinnated towards the dextral extremity ; the front ones 

 simple." Fleming. The structure of the tentacula is peculiar. 



6. E. despecta, branchial papillae three on each side in a 



single row ; tentacula four. 



Eolida despecta, Johnston in Mag. Nat. Hist. viii. 378. jig. 35 e. 

 Hah. Berwick Bay, between tide-marks, rare. 



Desc. Body two lines long, limaciform, watery-white, trun- 

 cate anteriorly. Tentacula simple, cylindrical, the dorsal long, 

 the inferior much shorter. Eyes two, distinct, placed behind 

 the bases of the superior tentacula. Back with three pairs of 

 clavate branchiae, the two first pairs large and nearly equal, 

 the posterior minute. Foot linear-oblong, tapered behind. 



Dr. Grant mentions the E. peregrina as a native of the Frith 

 of Forth (Edin. Phil. Journ. xiv. 185), but no description, de- 

 rived from a native specimen, has been published. Its cha- 

 racter as given by Lamarck is : " E. corpore lacteo ; cirrorum 

 ex fusco cceruleorum in dorso seriebus decern f 3 and a good 

 figure of it is given by Cavolini, Pol. Mar. p. 206. tav. J. fig. 3, 

 which, however, is somewhat at variance with the above cha- 

 racter. The branchiae are arranged in only six rows across the 

 back ; and the head is furnished with six tentacula, of which 

 the two anterior are the longest. 



Triopa*, Johnston. 



Character. Animal limaciform, acephalous : mouth with- 

 out feelers: tentacula dorsal, two, short and imbricate: branchiae 

 in the form of short papillae or tubercles irregularly disposed 

 on the sides and back, non-retractile, simple '.foot oval or linear- 

 oblong, plane. 



* The name of a son of Neptune. 



