IR S. OOTO AND P. HATAI. 



the male porcs, internal to them, and behind the chaetal line ; segment XIX with one 

 pair of genital papillae exactly similar in position to the inner pair of the preceding 

 segment (fig. 4). First dorsal pore in XIII/XLY. 



In the smaller specimen in our possessior measuring 143 mm. hy 5 mm., and 

 with 120 segments, the two pairs of papilla' mar the male pores, lying close to the 

 median line are absent. In all other respects, li >wever, it is exactly like the larger 

 specimen. We therefore regard the point just mentioned as an individual variation. 



Gizzard in VIII, IX; intestine beginning in XV, with one pair of cœca in 

 XXVI, extending aS far anteriorly as XXIII. Thickened septa IV/V— VII/VIII 

 and X/XI— XIV/XV ; septa VIII/IX and IX/X wanting. Spermathec:e three 

 pairs, in VII, Vili, IX, with straight appendages half as long as 

 the main sac and dnct (fig. 5). Sperm reservoirs in XI, XI r , 

 with dorsal surface divided into three lobes. Ovisac present. 

 Prostate glands large, in XVI— XX. Internally there is a large 

 glandular patch of a circular form in the median line, lying 

 equally in segments XVIII and XIX, and therefore corres- 

 ponding to the region surrounded by the genital papillae already 

 Fig. 5. described. 

 Loc. — Tokyo 



22. P. acincla, n. ?p. 

 Two specimens of the same dimensions, but with different number of segments. 

 Length 130 mm., breadth 7 mm. ; number of segments 108 and 113. Glilellnm absent, 

 segments XIV— XVI being exuctly similar to the others and bearing sel a. Oviduct 

 pore exceedingly small and difficult to recognize. Sette about 50 in the spermathecal 

 segments, and about 60 in the more posterior segments; segment XIV with 

 67 seta, XV with 57, XVI with 52. Spermathecal pores three pairs, in 

 V/VI, VI/VII, VII/VIII ; no genital papilla in this region. Male pores in XVIII, 



separated by 7 set re, each situated in the centre of a 

 circular concavity about 1.5 mm. in diameter, anp 

 opening on top of papilla? (fig. 6 ) Xo genital papil- 

 la in this region. First dorsal pore in XII/XIII. 



Fig. 6. 



Gizzard in Vili, IX ; intestine beginning in XV, 

 with one pair of cecca in XXVI, extending for two segments anteriorly. Thickened 

 septa V/VI,— VII/VIII and X/XI— XIII/XIV ; septa VIII/IX, IX/X wanting. 



XVIII 



