PHILIPPINE POLYCLAD TURBELLARIANS. 643 



ing from Collingwood's form, in which they are pointed at the tip. 

 When in motion the tentacular folds projected for about 4 mm. In 

 the fully extended state the body may have reached 55 mm. in length 

 and 18.5 mm. in breadth. 



The present example bears a close resemblance to Collingwood's 

 form in color. The entire margin of the body was marked on the 

 dorsal surface by a narrow band of cobalt blue. Along each side 

 of the median line occurred a narrow line of Antwerp blue, which 

 fused with its fellow of the opposite side before reaching the an- 

 terior and posterior extremities. The space inclosed between was of 

 the same color as the rest of the dorsal surface, which was pale 

 cream buff with numerous small lighter hydrophanous spots of vary- 

 ing size and distribution. The ventral surface was uniformly cream 

 with a border of cobalt blue just as on the dorsal. The dorsal 

 median blue lines were faintly visible from the ventral side. 



As is evident from the above, the present specimen has small 

 folded tentacles, whereas Collingwood's form bears tentacles of a 

 slender conical shape. Proceros concinnus, in fact, appears almost cer- 

 tainly to be an Euryleptid, as mentioned by Laidlaw, 6 who, although 

 not having made any precise identification, has given a note on 

 several examples of a species colored exactly like this, whilst the 

 present example is undoubtedly a member of the genus Pseudoceros. 

 In spite of such a small difference in the tentacles, it may, I think, 

 be advisable to refer this to Pseudoceros conci?inus, because of a 

 close resemblance in their coloration. 



7. PSEUDOCEROS RUBROTENTACULATUS, new species. 



Plate 2, fig. 7 ; test figs. 3, 4. 



Only one individual, which appears to represent a new species, was 

 found in the crevice of coral between tide marks at Dumurug Point, 

 in Cataingan Bay, Masbate, in April; holotvpe, Cat. No. 19103, 

 TJ.S.N.M. 



This species in the living state was of a small leaflike shape with 

 a sinuous outline. The anterior margin gave rise to a pair of ten- 

 tacular folds. In the expanded state the length of the body was 14 

 mm. and the breadth 10 mm. 



The dorsal surface was of a cream color with a narrow marginal 

 band of bright cobalt blue, decidedly intensified between the two 

 tentacular folds, where the band was about twice as wide as the rest. 

 The tentacular folds presented a bright orpigment orange-colored 

 spot on the outer side of the tip. Extending from the tentacular 

 region to near the posterior margin of the body were three bright 



6 Laidlaw, 1903, Proc. Zool. Soc. London, vol. 1, p. 315. 



