^OLis. 247 



ftithoms, near Governor's Island, Boston Harbor, June, 1850 

 (^Stii)ipson'). 



This small, but beautiful species agrees so well with the English 

 animal described by Alder and Hancock, that there can be but little 

 hesitation in pronouncing them the same. The small size, inflated 

 and brilliantly dotted branchia3, unequal and annulate tentacles, and 

 rounded angles of the foot are its principal characters. The dots 

 on the back are aggregated into a somewhat zigzag stripe. The 

 eggs are extruded in a ribbon, and attached in a coil by one edge. 



.fflolis diversa. 



Plate XIX. Figs. 267, 268, 276, 280. 



Body lanceolate, acutely pointed, pale yellow ; oral tentacles long and delicate ; 

 dorsal tentacles shorter, linear ; branchiae lanceolate, externally transparent and 

 colorless, interior orange, thiclvly arranged along the sides in transverse series of 

 three or four ; foot with the angles slightly dilated. 



Eolis diversa, Codthouy, Joiirn. Bost. Soc. Nat. Hist. ii. 187, pi. 4, fig. 14 (Feb. 1839). 



— GonLD, Inv. 6. — Stimpsox, Mar Invert. Grand Manan, 26. 

 EoUdia diversa, De Kay, N. Y. Moll. 9, pi. 5, fig. 97 (1843). 

 JEolis diversa, Stimpson, Check Lists, 4 (1860). 



Body long and slender, gradually tapering to a fine point, of a 

 very pale straw color, tinted reddish by the viscera within ; oral 

 tentacles slender and long, of the same color as the body ; dorsal 

 tentacles shorter. Head rounded, pretty distinct from the body. 

 Branchiae slender at insertion, gradually dilating, and then narrow- 

 ing to an obtuse point, externally clear and colorless, internally 

 deep orange or lake red, arranged in a crowded, rather irregular 

 manner along the sides in transverse series of three or four, the 

 shortest nearest the foot. Foot colorless or slightly tinted by the 

 reddish viscera, the interior angles moderately dilated. Length, an 

 inch and a quarter ; breadth, one third of an inch. 



Found among roots of Laminaria, Chelsea Beach ; Grand Ma- 

 nan (^Stimpson). 



Resembles in color E. salmonacea, but is much more slender, the 

 angles of the foot less dilated, and the dorsal tentacles simple in- 

 stead of serrated. 



Section 4. — Ters:;ipes^ Cuv. Body slender. Tentacles simple, 

 the oral pair very short. Branchiae fusiform, inflated, set in single 



\ 



