38 



PROCEEDINGS OP THE NATIONAL MUSEUM 



VOL. 75 



The female apertures are small diagonal slits on xiv, anterior to 

 the setae and just internal to line a, on a whitish oval area. 

 The spermathecal pores are in line with seta &, in 7/8. 

 The genital markings are paired round papillae on xvi and xvii. 

 The papillae of xvi are nearly twice the size of those on xvii. The 

 anterior pair extend from internal to a to halfway between h and c. 

 The posterior pair extend from just internal to h to halfway between 

 h and c. At the center of each papilla is thetransverse slit-shaped 

 male aperture. 



Internal anatomy. — Septa 4/5 and 5/6 are thickened, 5/6 about 

 twice as much as 4/5; 8/9 and 9/10 are thickened; 10/11 is slightly 

 thickened; 11/12 is attached normally only to the ventral parietes; 

 6/7 and 7/8 are absent. Segment xi isreduced to a median testicular 

 chamber by the fusion of 11/12 to 10/11 laterally 

 and dorsally. 



The gizzard is subspherical. Calciferous glands 

 are embedded in the wall of the alimentary 

 canal in xii. The intestine begins in xv. There 

 is a pair of small caeca at the sides of the intes- 

 tine in xxviii. 



There are tufted masses of nephridia adherent 

 to the parietes in the region of segment iii. 



There are three pairs of commissures in the 

 combination gizzard segment, the dorsal blood 

 vessel ending with the anteriormost pair. The 

 last pair of hearts is in xiii. 



The testes and the male funnels are inclosed 

 TiPsoFPENiAL within the median chamber on the posterior face 

 of 10/11. The seminal vesicles are large, in con- 

 tact with 10/11 anteriorly, and posteriorly pushing 12/13 and 13/14 

 back into contact with 14/15. The tubular prostates extend through 

 xvii and xviii and are broken into two coiled masses by 17/18. The 

 duct is about 3 mm. long and coiled twice. The vasa deferentia 

 are enlarged as they pass into the parietes just behind the prostatic 

 duct. 



The ovaries and oviduct funnels are in the usual positions in seg- 

 ment xiii. The spermathecal ampulla is large and ovoid. The duct 

 is short and practically confined to the body wall. The diverticula 

 are short whitish projections from the right and from the left sides 

 of the duct. 



Distribution. — Kyundo, Kawkareik. 



RemarTcs. — Aside from the type-specimen only anterior fragments 

 of this worm are available for study. These vary in diameter from 

 5-7 mm. The first dorsal pore is 11/12 in all specimens. 



Figure 21.- 



SIMILIS. 

 SETAE 



-EUTYPHOEUS 



