A. E. Verrill — Marine Planar ians of New Emjland. 465 



objects. From our other species of the family it also differs strongly 

 in the more anterior position of the mouth and stomach, as well as in 

 the arrangement of the frontal and cerebral ocelli. 



Stylochus frontalis Yerrill, sp. nov. 



Plate xliv, figure 1. 



Body elliptical, large, about one inch long and half as broad. 

 Tentacles small, obtuse, near together, well forward, nearly sur- 

 rounded at the base with a ring of many ocelli, and containing very 

 numerous, email black ocelli, arranged in two groups, one on the 

 antero-lateral, and the other on the inner-lateral surface. Frontal, 

 and cerebral ocelli form a large, median, double cluster containing 

 very many small ocelli, situated before and between the bases of the 

 tentacles and running to a point back of them, so as to form a me- 

 dian triangular patch, and extending forward in the form of a fan, 

 or large open triangular group, formed by the nearly complete 

 blending of the two lateral clusters, and becoming more widely scat- 

 tered toward the antferior margin. Marginal ocelli minute, forming 

 two or more closely crowded rows, close to the edge and most 

 numerous on the middle part of the anterior border, but extending 

 to the sides. 



Color, above, yellowish gray, mottled with yellowish brown, and 

 marked with the brighter orange-colored, repeatedly forked and 

 branched intestinal branches, which show best toward the paler 

 margins, and with unequal, rounded, scattered spots of dark brown 

 around the central region. The pharynx and stomach cause a cen- 

 tral whitish patch, narrowing backward ; behind this there is a 

 small pale patch, near the posterior end, caused by the reproductive, 

 organs. The under side of the body is paler than the upper. 



Length, in life, about 25'""' ; breadth 12""^^ Described from life. 



One living specimen was taken at Provincetown, Mass., from the 

 bottom of a whaling vessel recently returned from a cruise off the 

 Carolina coast in ISYQ. Some of the associated species were of 

 distinctly southern origin. 



The reproductive organs were not well seen, owing to the dark 

 color of the pigment. There appear to be two genital openings, 

 near together. The mouth is in advance of the middle of the body. 

 The pharynx has about five principal branches on each side, decreas- 

 ing backwards, while the posterior end extends some distance 

 beyond the last branches. The brancbes of the stomach are much 

 divided dichotomously, but do not seem to anastomose to any great 

 extent. 



