ON LANDPLANARIANS. 



31 



4. B. Simrothi'^), n. sp. (fig. 1). 



This Bipalium belongs to the species with a short and 

 broad body and has a well-developed head, which does 

 not surpass the breadth of the whole body, being only 6 

 mm. The colour of the back is of a very dark brown, 

 almost black, with a reddish-brown pattern. The latter 

 consists of a narrow longitudinal stripe, originating from 

 two large lateral spots on the head and running to the 

 tail of the animal, the last third being abruptly enlarged 

 to an almost oblong quadrangle. Five transverse bands of 

 the same colour occur between the head and the quadrangle , 

 of which the third does not reach the sides of the body. 



Ventral colouring with the broad ambulacral line of a 

 yellowish white. The mouth lies on the middle, the genital 

 aperture on about two thirds of the entire body-length. 



Length 26 mm.; greatest breadth 7 mm. 



A single specimen captured in 1894 by Mr. A. L. van 

 Hasselt on the Natuna-islands in the Southern Chinese Sea. 



Kg. 2. Fig. 1. 



B. expeditionis X 2i. B. Simrothi nat. size. 

 m. mouth; g. genital aperture. 



1) On asking Prof, von Graff whether this species was also new to him, he 

 nformed me that it had already heen described and figured by him under the 

 name of B. Simrothi, but that it was not yet published. For this reason I 

 feel obliged to accept this name. 



JS'otes from the Leyden Museum, "Vol. XVII. 



