492 A. E. Verrill — 3Iarine Planarians of New England. 



the posterior ends of the ganglions, so that each cluster is constricted 

 in the middle, or somewhat hour-glass shaped ; the dorsal groups 

 are more conspicuous, but usually smaller, irregular, longer than 

 broad, often somewhat elongate-triangular, with the acute end 

 directed backward ;* they are well separated fi'om the cerebral 

 groups and are, for the most part, behind them ; marginal ocelli are 

 small but numerous, in two or three rows extending back to the 

 middle, while numerous small ocelli are scattered over the whole 

 frontal region. 



Color pale yellowish or pinkish, with brown dendritic markings, 

 due to the much divided and lobed stomach branches ; the pharynx, 

 showing distinctly through the integument, forms a deeply lobed 

 central spot. The cerebral ganglions and nerves are reddish. The 

 mouth is rather large, situated in front of the middle, and about op- 

 posite the second pair of large pharyngeal lobes. Pharynx is large 

 and has about five pairs of large and long lobes. The main branches 

 of the stomach fork and divide arborescently at first, and the branches 

 are much lobulated along their sides, giving them a fern-like appear" 

 ance. They do not anastomose so freely as those of T. folium. 



Length 12 to 15™"i; breadth 6 to 8""". 



The reproductive organs (PI. xr.iv, fig. 3) agree pretty neai'ly with 

 those of T. folium, as seen in the mounted specimen. The penis- 

 bulb and granular gland together are more oblong than in that 

 species, and there appears to be a constriction near the front end, 

 partially separating the cap-like anterior portion from the rest. The 

 penis is short, conical, and simple ; its sheath is not so thick and 

 strong as in T. folium. The anterior female orifice is a little distance 

 back of the male orifice ; the glandular part of the vagina is elon- 

 gated, and its posterior orifice is situated well back. 



Off Race Point, Cape Cod, sta. 31 V, in 25 fathoms, 18V9. 



DisCOCelis P]hrenberg, 1832, (emend.); Lang, op. cit., p. 466. 



Body broad, usually ovate, foliaceous, marginal ocelli present, 

 cerebral and dorsal ocelli variable in number, usually in four groups. 

 Mouth central or a little in advance of the center. Pharynx large, 

 and sometimes with divided accessory pouches, A single common 



* The mounted specimens, as well as some of my sketches from life, show that 

 all the groups of ocelli as represented in fig. 4, Plate xii, are too regularly triangular, 

 and the posterior groups are too large and too elongated; the enlarged figure on 

 Plate XLii. fig. 4a, is from the same specimen, after nionnting; but doubtless the 

 shape of the groups is more or leas altered by contraction. 



