PHILIPPINE POLYCLAD TURBELLARIANS. 645 



musculinum forms an oblique upwardly directed, annular out- 

 bulging before opening to the exterior. 



In having three bands of almost similar breadth, each of which 

 was bordered by a narrow dark pigmented stripe, the present spe- 

 (Kelaart), which will be described later. But it stands distinctly 

 at variance from this chiefly in the different features of the tentacles 

 and coloration, as may be seen from the description. 



8. PSEUDOCEROS PHILIPPINENSIS, new species. 



Plate 2, fig. S. 



A single representative of this interesting new species was col- 

 lected in Subic Bay, Luzon, in January, holotype, Cat. No. 19104, 

 U.S.N.M. 



The body in the living state was firm in texture, leaf like in shape, 

 and had the margin strongly frilled. The frontal margin shows an 

 aspect somewhat similar to that in Pseudoceros bedfordi Laidlaw 7 

 from Singapore Harbor, the tentacles forming two loops, as is seen 

 in figure 8. In the resting state the body measured 40 mm. long by 

 10 mm. across in the broadest part. When swimming it may have 

 reached about 75 mm. in length. 



The dorsal surface was of a velvety black color with a touch of 

 purple and was marked by a median stripe of light purple, extend- 

 ing through about two-thirds the length of the body posteriorly from 

 the anterior margin. On each side of the median stripe, a short 

 distance from it, was an ashy-gray band of twice the width of the 

 median one. These two bands extended from the anterior margin 

 to near the posterior. Further, the body was bordered all around 

 by two narrow bands of almost similar breadth, the outer marginal 

 band orange chrome and the inner submarginal white, shading to 

 ashy at the inner border. In the anterior median parts of the 

 ventral surface was a white shade, extending about halfway across 

 the body. The rest of the surface was of a velvety black color, as 

 on the dorsal. The extreme margin was orange chrome, but the 

 rim was very thin. 



The deep pigmentation makes it impossible to determine the ar- 

 rangement of eyespots. 



This strikingly handsome specimen was unfortunately broken in 

 part, so that a satisfactory examination was not possible. It may, 

 however, be provided with a pair of the male organs. 



7 Laidlaw, 1903, Proc. Zool. Soc. London, vol. 1, p. 314. 



