MARINE MOLLUSCA OF THE UNITED STATES. 115 



versely, long, but shorter than oral ; branchiae few, arranged in 



about five clusters on each side, those of second and third being 



longest, giving a star-like appearance to the animal when rolled 



up ; foot strongby auricled in front. 



Length 10 mill. 



Grand Manan Island. 



5. F. purpurea, Stimpson. 



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



BocVy large, full, robust, tentacles rather short, thick, smooth ; 



the dorsal ones with the eyes far behind their bases ; papillae large, 



flattened, crowded, arranged in five or six clusters on each side, 



leaving the middle third of the body bare ; foot broad, with short 



auricles in front ; mouth disk large, triangular ; body pale-whitish, 



dark in the middle line, from the viscera showing through ; pa- 



pillre dark-purplish, with the tips covered with intense white 



specks. 



Length 1 inch. 



Duck Island. 



6. F. picta, Alder and Hancock. Fig. 238. 



(.Eolis.) Monog. Nud. Moll., t. 33. 1847. 



Yellowish-white, blotched with brownish-aniber ; oral tentacles 



short, stout ; dorsal tentacles twice as long, simple, with an amber 



ring at outer third ; branchiae like an olive-jar, arranged in six or 



eight series ; foot narrower than body, obtuse posteriorly, anterior 



angles rounded. 



Length 18, breadth 4.5 mill. 



Massachusetts. 



1. F. diversa, Couthouy. Fig. 239. 



{Eolis.) Bost. Journ. Nat. Hist., ii. 187, t. 4, f. 14. 1839. 

 Body lanceolate, acutely pointed, pale-yellow ; oral tentacles 

 long and delicate; dorsal tentacles shorter, linear; branchiae 

 lanceolate, .externally transparent and colorless, interior orange, 

 thickly arranged along the sides in transverse series of three or 

 four ; foot with the angles slightly dilated. 

 Length 31, breadth 8 mill. 



New England; Grand Manan. 



