42 Art. 4.— ï. Kaburaki : 



IS. Placocetthalus rirf/ftfus (Stimpson.) 



(PI. L, Fig. 18.— Text fig. 22.) 



Bipalium dnjatinn, Stimpsox (62). pp. 25, 30. — Diesing (16), p. 514. — Moseley 

 (45), p. 51 and (46), p. 290.— Lojian (40), p. 64.— von. Geaff (25), p. 445. 



Two specimens of the species, which seems to be identical 

 with Stimpson's Bipalium virgatum, described by that author from 

 the Loo Choo Islands, were collected by Professor Watase, Dr. 

 HÔZAWA and the late Mr. Yasuda in May, 1911, in the neigh- 

 bourhood of Taihoku, Formosa. 



The head in the preserved condition is of a small semi-lunar 

 shape and less than the width of the body, from which it is only 

 separated by a neck-like constriction. The elongate and slender 

 trunk presents the lateral margins even and nearly parallel for the 

 greater part of its length, though it tapers gradually in the hind 

 parts to the bluntly pointed extremity. Extending over almost 

 the entire length of the body is a slightly raised ridge, the sole, 

 which is rather less than one-fifth the breadth of the body. The 

 large specimen attains a length of about 150 mm. and a breadth 

 of 4 mm. , while the small measures 60 mm. long by 3 mm. 

 broad. 



..rr^.-r.-:^ The ground colour of the dorsal surface, 



^ l\ in spirit, is bufï with five dark stripes, a median 



I Ij and two pairs of lateral, which extend over 



'^^ ■£ almost the entire length of the body; in this 



'\ respect the present species seems to be allied to 



\ Placocephalus kewensis Moseley, so that it may 



/:' , be referable to this species. The median stripe 



is very fine and loses itself on reaching a point 



Text fig. 22. Distribu. somcwhat behind the head. The inner pair 



W of eye-spots in pzaco are much the strongest of all, and the outer 



cephalusvirg<itus{STiMPsoy; . 



pan' at the edge of the body become indistinct 

 as they approach the hind end; on either side both coalesce at the 

 neck into a small dusky patch. The ventral surface is similar in 

 colour to the dorsal, except on the sole which is pale. 



