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, Mass. 



Genus FLABELLINA, Cuvier. 



1. F. BOSTONIENSIS, Couthony. Fig. 234. 



(Eotis.) Bost. Journ. Nat. Hist., ii. 67, 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, 26. 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. 



New 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. S.TELLATA, Stimpson. Fig. 237. 



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

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



