Terrestrial Phiu iriaus froui Japauese Territories. 



The liead, wliicli is semi-lunar in shape, ].iesents a somewhat 

 recurrent lappet on either side and is not less than twice the 

 breadth of the body, from which it is separated by a neck-like 

 narrowing. The frontal margin of the head in the creeping state 

 shows a serrated appearance. The trunk is almost uniformly broad 

 for the most part, but gradually tapering in the hind parts to the 

 bluntly pointed extremity. Dorsally it is slightly convex and 

 ventrally nearly fiat, the sole on the mid-ventral surface forms a 

 slightly raised ridge, rather less than one-third the width of the 

 body, and extending from the l)ase of tlie head to the posterior 

 end. The lai'ge specimen measures 90 mm. long by 5 mm. bi-oad, 

 while the small is 50 mm. long by 2.5 mm. Inroad: the head in 

 both measures 7 mm. across. 



The dorsal surface is of a uniform 

 dark brownish colour, which anteriorlv 

 gets more or less lighter. Ventrally. 

 the colour is much lighter than that of 

 the dorsal surface, exce]it on the sole 

 which presents a pale tone. 



The eye-spots are thickly distri- 

 buted all round the niargin of the head 

 and also occur spaiingly scattered over 

 the entire length of the hod}^ sub- 

 marginally on the ventral .side. At the sides of the neck, they 

 are especially densely packed. 



The mouth-opening is placed slightly in front of the centre of 

 the body, leading into the peripharyngeal chamber. In the pre- 

 served specimens the pharynx is protruded through the mouth- 

 opening. 



The common genital aperture is situated near the centre of 

 the second fourth of the distance between the mouth-opening and 

 the posterioi- extremity of the body. 



The epidermis consists of a layer of columnar cells which are 

 a great deal higher on the dor.sal than on the ventral surface. 

 Widely distributed almost over the entire surface of the body, 

 except on the sole, are enormous quantities of vermiform rhabdites 



Text fi^-. 2. Distrilniticu of eye- 

 spots in Dipalium venosum. u. sp. 



