40 Records of the Indian Museum. [Vol. XIX, 1920.] 



This specimen attains in the preserved state a length of 87*5 mm. 

 and the greatest breadth^ a Uttle behind the neck, of 4 mm. 



According to Dr. Annandale's note, taken while the worm 

 was living, the dorsal surface of the body is of a blackish colour 

 with a broad brown median dorsal band, which is divided longi- 

 tudinally by a fine black line, and is bounded on either side, by 

 a black line of about twice the width of the fine one. These three 

 lines extend from the head to the caudal extremity, much as in 

 the form reported from Singapore. The mid-dorsal line widens 

 quite extraordinarily above the pharyngeal region, revealing a 

 spindle-like marking, and as it approaches the hind end becomes 

 gradually indistinct. The present specimen varies in the coloura- 

 tion of the broad dorsal band from the examples previously 

 recorded. According to v. Graff, however, this, not being con- 

 stant, must be regarded as a variation. Further, in the present 

 worm there exists just a suspicion of a lateral dark line at the 

 edge of the body, as has been described by v. Graff in some forms 

 from Java as well as from Singapore. The head is almost uni- 

 formly blackish, without any sign of marking, but gets slightl}^ 

 lighter towards the frontal margin. Ventrally, the ambulacral 

 surface is as usual of a much paler colour than the rest of the 

 surface. On either side the colour may be described as a dark 

 grey shade, getting much lighter laterally. 



It is not easy to assign the distribution of the eyes in the 

 head, but they surround as usual its entire fringe and are con- 

 tinued round to the sides of the neck. 



The mouth is placed slightly in front of the commencement 

 of the middle third of the body. I could make out its position 

 by a slight protrusion of the pharynx. 



According to lyoman,' Plac. javanus is protandrous, the male 

 genital organs being mature in July and August, and the egg- 

 cocoons not being deposited till October or November. In the 

 present specimen, secured on the 24th of January, 1916, the 

 genital organs were not developed. Like other forms, this species 

 may to some extent reproduce assexually by transverse fission, 

 as mentioned by v. Graff. 



^ Loman, J. C. C, Over den bouw van de l.and-Planarien. Tijdschr. Nederl. 

 Dierk, Ver., Deel I, p. 130. Shipley, A. E., On the Occurrence of BipaUiim 

 kevvense, Moseley, in a new LocaHtv ; with a Note upon the I'rticating Organs. 

 Proc. of the Camb. Philos. Soc, Vol. VII, Pt. IV, 1891, p. 144. 



