50 Dr. Johnston on Scottish Mollusca. 



** Branchiae papillary : tentacula two or three pairs, sheathless, contractile, 

 simple. Tetracerata, Blainville, Man. 484. — Phyllobr anchia, La- 

 treille, Fam. du Reg. Anim. 175. — Les Glauques, Rang, Man, 125. 



4. Eolidia. Branchiae papillary, undivided. 



*** Br anchice papillary, scattered: dorsal tentacula two only, imbricate. 



5. Triopa. Branchiae simple, and, as well as the tentacula, 

 without a sheath. 



1, Doris -f, Linnceus. 

 Character. Body acephalous, ovate-depressed with the 

 margin of the cloak free, or prismatic and limaciform : mouth 

 proboscidiform with a pair of labial tentacula : dorsal tenta- 

 cula 2, lamellated and retractile : anus posterior, dorsal and 

 mesial, encircled with the arborescent or pinnate branchiae, 

 which are retractile within a sort of cup : foot plane : orifice 

 of the organs of generation on the right side and anterior. 

 Cuvier,Reg. Anim. iii. 51. Lamarck, Anim. s. Vert. vi. i.'309. 

 Rang, Man. 132. Blainville, Malacol. 488. 



* Margin of the cloak overlapping the foot. 

 1. D. tuberculata, body ovate-depressed, above closely tu- 

 berculate, the margin of the cloak rather narrow ; orifices of 

 the tentacula without sheaths ; leaflets of the branchiae 8, plu- 

 mose. Plate II. fig. 1 — 3. , 



Doris tuberculata, Cuv. Mem. v. 23. pi. 2. fig. 5. Lam. Anim. s. Vert. 



vi. i. 311. Johnston in Zool.Journ. iv. 416. — Doris Argo, Pen. Brit. 



Zool. iv. 82. pi. 24. male. Jameson in Wern. Mem. i. 556. Stew. 



Elem. i. 38/. Turt. Gmel. iv. 11. Turt. Brit. Faun. 133. Blumen- 



bach, Nat. Hist. 245. Fleming in Edin. Phil. Journ. viii. 295 ; and 



Edin. Encyclop. xiv. 618. Grant in Edin. Phil. Journ. xiii. 198. Flem. 



Brit. Anim. 282. — D. Argus, Stark, Elem. ii. 68. — D. Pseudo-argus, 



Rapp in Nov. Act. Phy. Med. Acad. Cces. Leop. Car. Nat. Cur. xiii. 



519. 



Hab. " Among the sea- weeds and crevices of rocks near low-water 



mark, common," Rev. Dr. Fleming. On the rocks near the Beacon at Leith, 



Prof essor Jameson. Frith of Forth, Dr. Grant. Bell-Rock and Isle of May, 



common, Rev. Dr. Fleming. On the E. shore of Bute, Dr. Coldstream. 



Coast of Berwickshire, occasionally. 



Desc. Body sometimes three inches long and nearly two 

 broad, ovate-depressed. Cloak usually grey, sometimes straw- 

 coloured or sulphur-yellow, marbled with cinereous and pink 

 blotches, and closely covered with small round unequal tuber- 

 t The mother of the sea-nymphs called Nereides. 



