338 KEPOUT OF COMMISSIONER OF FISH AXD FISHERIES. 



slender incurved point; the other end is obtusely rounded, depressed 

 and translucent at the end, apparently with a transverse orifice beneath. 

 The largest specimen, and one of the smaller, has one end correspond- 

 ing in form to that last described ; the other is rounded, a little enlarged, 

 subtruncate, apparently with a terminal orifice. A yellowish internal 

 organ, with transverse divisions, runs along each side internally. In life 

 the color wag grayish white, with four very slender doable longitudinal 

 lines of dark slate-color. 



Length of largest specimens, in alcohol, S0 !nm ; diameter, 0.7' 11 " 1 ; small- 

 est ones, 40 mm ; diameter, 0.5 inm . 



AYood's Hole, swimming very actively at the surface in the evening, 

 June 29 and July 13, 1871. 



This species was taken by Mr. S. I. Smith, who recorded the color. I 

 did not observe it myself in the living state. The above description 

 was made from preserved specimens. Its characters cannot all be made 

 out satisfactorily with alcoholic specimens, and its generic and family 

 affinities are uncertain. In general appearance, when living and moving, 

 it resembles Gordlun and Rliamplwyordiux. 



DEXDKOCCELA or 1'LAXAKMAX.S. 



STYLOCIIOPSIS LITTORALIS Verrill, sp. uov. Plate XIX, tig. 99. (p. 3i'.j.) 

 Body flat with thin margins, very changeable in form, broad oval, 

 elliptical or oblong, rounded or sub-truncate at the ends, often with the 

 margins undulated. The tentacles are small, round, obtuse, translu- 

 cent, each containing an elongated group of about ten or twelve minute 

 black ocelli on the anterior surface. The tentacles are situated at about 

 the anterior fourth of the body, and are separated by about one-fourth 

 of its breadth. Dorsal ocelli about eight, forming four groups of two 

 each, in advance of the tentacles; marginal ocelli numerous, small, 

 black, most conspicuous beneath, and most numerous on the anterior 

 portion, arranged in two or more irregular rows near the margin, ex- 

 tending back to the middle of the sides or beyond. Color pale greenish 

 or brownish yellow, veined or reticulated with lighter, and with a light 

 median stripe posteriorly; beneath flesh-color, with a median elongated 

 light spot, narrowest in the middle, due to internal organs. 

 Length, 8 mm ; breadth, about 6 mm . 

 New Haven to Vineyard Sound ; under stones, between tides. 



PLANOCERA NEBULOSA Girard. Plate XIX, fig. 100. (p. 325.) 



Proceedings of the Academy of Natural Sciences of Philadelphia for 1H53, vol. 

 vi, p. 367, 1854. 



Savin Bock nearXew Haven, under stones at low-water. Charleston, 

 S. C. (Girard). 



LEPTOPLANA FOLIUM Verrill, sp. uov. (p. 487.) 



Body very flat, with the margin thin and undulated ; outline versatile, 

 usually cordate or leaf-like, broadest and emarginate posteriorly, the 



