118 Dr. Johnston on Scottish Mollusca. 



selves in a tuft of Plumularia Catharina, and they only differed 

 in the intensity of their colouring, yet they were mature, if the 

 capability of propagating the species is a proof of that state. 

 The spawn was wrapt round the stalks of the coralline in a 

 white spiral gelatinous mass full of imbedded ova. 



Cuvier referred these species to the genus Tritonia, but the 

 structure of the tentacula and branchiae seem too dissimilar to 

 warrant such a collocation. Rang has suggested their relation 

 to Melibea, and I have followed this suggestion, giving accord- 

 ingly a greater latitude to his generic character ; but, perhaps, 

 the preferable plan would be to form them into a new genus. 



4. Eolidia*, Cuvier. 



Character. Animal limaciform : the foot linear-oblong, 

 tapered behind, plane : mouth with a pair of thin corneous 

 jaws : tentacula 4 — 6, non-retractile, two of them labial, sim- 

 ple, elongate, conical, the dorsal subannular : eyes two, sessile 

 at the bases of the dorsal tentacula : branchiae in the form of 

 elongated papillae arranged along the sides or on the back in 

 series : anal and generative vents placed forwards on the right 

 side. Cuvier, Reg, Anim. iii. 55. Lamarck, Anim. s. Vert.vi. i. 

 301. Rang, Man. 127. Blainville, Malacol. 486. 



1. E. papillosa, branchiae numerous, papillary, covering the 

 sides in several series : tentacula four. 



Doris, Baster, Opus. subs. i. 81. tab. 10. fig. 1, copied into Encyclop. 

 Method, pi. 82. fig. 12. — Limax papillosus, Lin. Syst. 1082.— Doris pa- 

 pillosa, Mull. Zool. Dan. Prod. 229. Fabr. Faun. Grcenl. 345. Turt. 

 Gmel. iv. 78. Montagu in Lin. Trans, xi. 16. pZ. 4. fig. 3. Stew. Elem. 

 i. 387. — D. vermigera, Turt. Brit. Faun. 133. — Tritonia papillosa, Flem- 

 ing in Edin. Encyclop. xiv. 619. Bosc. Vers. i. 105. Jameson in Wern. 

 Mem. i. 556. Penn. Brit. Zool. iv. 81. — Eolida papillosa, Flem. Brit. 

 Anim. 285. Edin. Phil. Journ. viii. 295. — Eolis Cuvieri, Stark, Elem. 

 ii. 69. — Eolidia papillosa, Johnston in Mag. Nat. Hist. viii. 376. fig. 35. 



Hob. Among sea weeds, near low water. Leith shore, Prof. Jameson. 

 Bell Rock and Isle of May, common, Dr. Fleming. Coast of Berwickshire. 



Desc. Body between two and three inches in length, and 

 more than half an inch in breadth, limaciform, narrowed at 

 the tail, of a freckled purplish-brown colour with grey or 



* Formed from JEolis, applied to females descended from iEolus. La- 

 marck more properly used Eolis. 



