28 A, E. Yerrlll — Additions to the Fauna of the Bermudas. 



sinus ; its surface is minutely papillose and rough. Head broad, 

 with the angles somewhat produced into short, broad tentacles. 

 Rhinophores stout, rather long, strongly folded, of nearly uniform 

 breadth, obtuse. Foot wider than the mantle, and only slightly 

 longer, the edges thin and undulated, the anterior angles a little pro- 

 duced but obtuse. Gill plumose, attached for about half its length, 

 white. The mantle contains sj^icules, but, as preserved in formalin, 

 it is soft and rather thick. 



Color pale grayish white or translucent white, specked with flake- 

 white, and with a purplish gray visceral organ showing through on 

 the back. 



Length, in life, IG™"". 



Harrington Sound, in shallow water, on the under side of a coral 

 {Isophyllia dipsacea), April 9th ; also in Castle Harbor, low-tide, 

 under stones, in May. 



Runcina inconspicua V., sp. iiov. 



Plate III. Figure 6. 



A very small dark green and brown species. Head bilobed and 

 eraarginate in front with a pair of small, round black eyes near the 

 front edge. Mantle oblong or subelliptical, evenly rounded poster- 

 riorly. Foot wider than mantle, wuth thin undulated margins, well 

 rounded posteriorly. Gill small with fine filaments situated under 

 the right mantle-bordei", near the posterior end. 



Color of mantle very dark green or greenish brown with a narrow 

 orange border ; upper side of foot light green, specked with white 

 and edged with a narrow orange or violet line. 



Length, 2 to S"^™ in life. 



Castle Harbor, at low-tide, under stones, in May. Several speci- 

 mens. 



NUDIBRANCHIATA. 



Elysia ornata (Swainson) Ver. 



Thallepus ornatus Swainson, Treatise Malac, pp. 250, 359, 1840, from a draw- 

 ing, (West Indies. ) 

 Dcdabrifera (?) ornata Pilsbry, Man. Coucliology, vol. xvi, p. 126. 



Plate IY. Figure 5. 



This beautiful species was originally imiDcrfectly described, as 

 indicated above, from the West Indies. The descri^Jtion was from 

 a colored drawing only, and was so imperfect that the place of the 

 species in the Mollusca has never been settled. The colors, as 



