114 AMERICAN MARINE CONCHOLOGY. 



serrated; mouth /^-shaped ; branchiae in longitudinal series, one 



hundred or more; foot with two short processes in front, and 



ending in a point behind ; pale yellowish-white ; branchial cirri 



salmon-colored, bordering on orange. 



Length one and three-quarters inch. \ 



Charles River, Muss. 



Genus FLABELLINA, Cuvier. 



1. F. Bostoniensis, Couthouy. Fig. 234. 



{Eolis.) Bost. Journ. Nat. Hist., ii. G7, t. 1, f. 1. 1838. 



Body elongate, lanceolate, delicate drab-color, with a silvery 

 line on the tail and on the back of the anterior tentacles, which 

 are long, subulate ; posterior tentacles shorter, serrated at tips ; 

 branchiae curved lanceolate, nucleus drab-colored, tips white, in 

 four to six distant groups on each side ; angles of foot much pro- 

 duced. 



Length 25, diam. 7.5 mill. 



Massachusetts. 



2. F. rufibranchialis, Johnston. Fig. 235. 



{Eolidia.) Loud. Mag. Nat. Hist., v. 428. 

 Eolidia Embletoni, Johnston, Ibid., viii. 79. 

 Eolis Mananensis, Stimpson, Invert. Grand Manan, 2G. 1853. 



Body slender, tapering, white; oval and dorsal tentacles sub- 

 equal ; branchiae nearly linear, variable in length, disposed in six 

 or seven clusters on each side, interior of a bright vermillion, 

 with an opaque white rim near tip ; anterior angles of foot pro- 

 longed and folded transversely. 



Length one inch. 



Neio England, northwards. {Eur.) 



3. F. pilata, Gould. Fig. 236. 



Invert. Mass., 2d edit.^243, t. 19, f. 270, 277, 279, 281. 1870. 

 Body elongated, a carmine line margined with silvery dots be- 

 tween the tentacles and each tuft of branchiae, tail silvery ; tenta- 

 cles subulate, simple, tipped with silvery, branchiae clavate, con- 

 tracted at tip, which has two silvery zones, nucleus pale-chestnut, 

 arranged in five or more distant groups of two transverse ranges. 



Length 37, breadth 6 mill. 



Charles River, Mass. 



4. F. stellata, Stimpson. Fig. 237. 



{Eolis.) Invert. Grand Manan, 25. 1853. 



Body slender, pale-white ; dorsal tentacles wrinkled trans- 



