﻿THE COASTS OF B.HODE ISLAND AND NEW JERSEY. 143 



This species differs from Bowerhanlda densa in having a less number of tentaculso 

 and in having no spines to the cells. From Farella our polype differs in possessing a 

 strong gizzard. The animal corresponds in its form very closely with the figure 

 given by Hassal in the seventh volume of the An. and Mag. of Nat History for 1841, 

 PI. viii. fig. 4. 



22. Pedicellina Americana, Leidy. (PL X. fig. 25.) Polypidom delicate, creeping, 

 white, with erect branches about one-third of a line in length, smooth and without 

 abrupt dilatations. Polype campanulate, white, with a wide, crenated border marked 

 with fine concentric lines. Tentaculre cylindrical, twelve or more in number. Found 

 attached to the roots of Laminaria saccliarina, at Point Judith. 



23. Valkeria pustulosa, Johnston. Polypidom growing in profuse, wide spreading 

 bunches up to two or more inches from the root of attachment. Stems flexuose ; 

 alternately branching at the flexures. Cells oval, arranged in semi-spiral clusters up 

 to a half a line in length and situated about the same distance apart. Found by Mr. 

 Samuel Ashmead, in Great Egg Harbor, N. J. 



DENDROCCELA. 



24. Monocelis agilis, Leidy. Body elongated elliptical, anteriorly and posteriorly 

 subacute, black or fuliginous. Eye brown. Length one line, breadth one-eighth of 

 a line. Found actively creeping on Mytilus edulis. Point Judith. 



25. Planaria frequens, Leidy. Body spatulate, posteriorly convex, anteriorly 

 narrowed ; head auriculate. Eyes two, reniform, distant. Color above black, beneath 

 grey. Length one to two lines, by one-sixth to two-fifths of a line in breadth. A 

 small, quite active, and remarkably abundant species, found beneath stones, near 

 high tide mark. Point Judith. 



26. Nemertes socialis, Leidy. Body long, linear, flattened, anteriorly subacute, 

 posteriorly obtuse or subacute; usually black above, and brownish ash colored beneath, 

 occasionally brownish ash colored with the anterior extremity tipped with black. 

 Head not constricted from the body. Eyes two to four pairs, arranged longitudinally 

 on each side. Length up to six inches, by one-third of a line in breadth. Very 

 abundant, often in masses, about the roots of corallines between tides. Point Judith. 



27. Meckelia ingens, Leidy. Body long, tape-like, narrowed posteriorly, cream 

 colored. Head obtusely angular, depressed ; lateral fissures deep. Generative aper- 

 ture a longitudinal fissure. Described from a specimen preserved in alcohol, and 

 measuring in its present condition, fifteen inches in length, eight lines in breadth and 

 three and a half lines in thickness. It was obtained by Mr. Chas. C. Ashmead, 

 from an oyster bed, at Beesley's Point, New Jersey, and when alive measured more 

 than a yard in length. 



87 



