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 strongly auricled in front. 

 Length 10 mill. 



Grand Manan Island. 



5. F. PURPUREA, Stimpson. 



& (Eolis.) Invert, prand Manan, 25. 1853. 



Body 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- 

 pillae 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-amber ; 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. 



7. 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 ; branchije 

 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. 



