462 Records of the Indian Museum. [Vol. VIII, 



extremely attenuated form of the body has resulted in the obli- 

 teration of the head lobe, which is never very prominent: such 

 a striking correspondence of general colour pattern suggests that 

 the difference in form of the head may thus be accounted for. 

 Should the animal prove to belong to the Geoplanidae, the almost 

 identical trunk colouration could only be accounted for by regard- 

 ing it as an excellent case of mimicry. 



The ventral surface colouration agrees with the other specimens. 



Appendix II. 



Special attention should be drawn to one specimen (No. 

 ZEV--y-, fig. 20a} which shows a distinct variety in dorsal head 

 colouration. The dorsal colours are well defined, consisting of 

 a pale buff median stripe, flanked on either side by a thin well- 

 defined black line, which, on reaching the head, expands into two 

 broad patches. On the outer side of each of these median black 

 lines is a definite chestnut brown band, followed by the rather 

 broad pale buff stripe before reaching the broad lateral black 

 band ; the body is edged by a repetition of the pale buff marking. 

 As in the normal specimens, the head is fringed all round with a 

 black seam. 



The head m.arkings remind one of Bipaliiini diana with its 

 black edge to the head lobe, and the cephalic expansions of the 

 median pair of b'ack lines ; this latter feature is also reminiscent of 

 Bipalium ceres. But neither of these species has the same general 

 colours or the lateral black bands in the trunk. The general 

 colour of the animal closely resembles that of some varieties of 

 Bipalium proserpina, but this latter species has no black edge to 

 the head lobe. The animal under consideration might, of course, 

 be regarded as a variety of B. proserpina in which the black edge 

 to the head is a new feature, and the broad paired central black 

 bands (see v. Graff's Monograph) have differentiated into a thin 

 median pair of black, and an adjacent brown, band. For the 

 present, however, I think it is advisable to include it as a 

 variety of Placocephalus superbus. 



Pclmatoplana aurantia, n. sp. 

 (Plate xxx, figs. 21 — 26.) 



Only a single specimen of this species was found, and was 

 taken from under stones at Rotung, It measures 50 mm. in 

 length, 4 mm. across, at its widest part, the region of the genital 

 pore, and 3 mm. in thickness. The mouth is situated 18 mm. and 

 the genital aperture 29 mm. from the anterior end. The body, 

 is sub-cvlindrical for the first third of its length, beyond which it 

 gradually becomes more depressed, tapering slowly from the geni- 

 tal region to a pointed extremity. 



A number of eyes are present and extend round the sides and 

 front of the uptilted head ; they are more numerous at the sides 



