A. E. Verrlll — Marine Pldnarlans of Neio England. 495 



Pharynx tubular, long or short, exsertible. Main stomach cavity 

 not extending forward beyond the pharynx. Lateral branches of 

 the stomach variable in number, reticulated or dendritic. 



Tentacles, when present, situated at the anterior margin, often 

 wanting. Ocelli numerous, usually forming two cerebral clusters ; 

 an anterior marginal row ; and clusters in the tentacles, when these 

 are present. Female organs are without a copulatory pouch and 

 accessory vesicle or spermatheca. The male organs are variously 

 situated, often anterior ; sometimes they are paired, or even (in the 

 genus Anonymus) multiple in a lateral row along each side. De- 

 velopment with metamorphosis. 



Family, Euryleptice Stimp., 1857 (emend.). 



Euryleptidm Lang, Die Polycladen des Golfes von Neapel, p. 553, 1884. 



Body ovate or elliptical. Marginal tentacles present or absent. 

 Mouth near the anterior extremity of the body. Pharynx tubular. 

 Stomach long, narrow ; its branches either simple or anastomosing. 

 Ocelli are present at the front margin of the body and in the tenta- 

 cles, when these are present; others form two cerebral groups. 



Eurylepta (Ehrenberg) Lang. 



Body not papillose. Marginal tentacles well developed, elongated, 

 not pliciform. Pharynx cylindrical. Principal lateral branches of 

 the stomach about five on each side, not anastomosing. Male aper- 

 ture under the posterior end of the pharyngeal sac. 



Eurylepta maculosa Verriii, sp. nov. 



Plate xlt, figures 2, 3. 



Description of living specimens: — Body thin, very changeable, 

 usually elliptical or oblong, and more or less elongated, with the 

 margin very thin ; in motion often wavy and undulated, and con- 

 stantly changing its form ; frontal margin rather narrow with two 

 moderately long, obtuse, flattened marginal tentacles, which are 

 flexible and changeable in form. 



Ocelli numerous; on the lower and anterior sides of the tentacles 

 there are clusters of numerous, minute, black ocelli, but they do not 

 e.Ktend much above the middle of the tentacles ; numerous similar 

 marginal ocelli are scattered between the tentacles on and near the 

 front margin ; back of the tentacles, the distance varying with the 

 state of contraction or extension, there are, above the ganglions, two 

 elongated groups of cerebral ocelli, side by side, and so close together 

 as to appear, at times, like one broad group ; each of these groups 



