Dr. Johnston on Scottish Mollusca. 55 



6. D. nodosa, " cloak with four equidistant papillae on each 

 side the medial line." Fleming. 



Doris nodosa, Montagu in Linn. Trans, ix. 107. pi. 7. fig- 2. Fleming in 

 Edin. Encyclop. xiv. 618. Pen. Brit. Zool. iv. 85. Flem. Brit. Anim. 

 282. 



Hab. " Among the rocks at St. Andrew's," Rev. Dr. Fleming. 



Desc. 



7. D. nigricans, " cloak thickly covered with short lan- 

 ceolate tubercles ; branchial plumes about eight in number." 

 Fleming. 



Doris nigricans, Fleming in Edin. Encyclop. xiv. 618. Flem. Brit. Anim. 



283. 

 Hab. " Zetland/' Rev. Dr. Fleming. 



Desc. "Length about half an inch, pale, freckled with 

 dusky; cloak emarginate anteriorly ; sheath of the superior ten- 

 tacula notched in the margin." Fleming. May not this be a 

 variety of D. pilosa ? 



** Body prismatic. 



8. D. Barvicensis, body smooth; branchial leaflets eight, 

 plumose. Plate II. fig. 11 — 13. 



Doris electrina?? Pen. Brit. Zool. iv. 83. pi. 26. fig. 1. Stew. Elem. 



i. 387.— D. bilaraellata ? ? Turt. Brit. Faun. 134. 

 Hab. Amongst corallines in deep water. Coast of Berwickshire, rare. 



Desc. Body prismatic, y^tus of an inch long, about one-third 

 as broad, of a white watery colour irregularly clouded with sul- 

 phur-yellow and pink, (the latter dependent on the viscera,) 

 and sprinkled all over with minute white dots. Back smooth, 

 the cloak adnate, thickened at the sides, where it forms a sort 

 of narrow membranous rim. Sides abrupt, smooth. Foot 

 elongated beyond the cloak and tapered to an obtuse depressed 

 tail, white, with a yellowish medial line and a thin pellucid 

 edge, the anterior angles produced into two distinct tentacular 

 processes. Dorsal tentacula cylindrical, yellowish, the upper 

 half lamellated with the shaft lengthened into a small mucro ; 

 they issue from wide sheaths emarginate on their inner sides. 

 Branchial leaflets eight, when moderately extended like papillae 

 or tubercles, but when fully expanded they are somewhat plu- 

 mose and encircle the prominent tubular vent, from which 

 white lines radiate to the branchiae : just behind the branchial 



