498 PROCEEDINGS OF THE NATIONAL MUSEU:M vol. Sr> 



other specimen ; setae apparently lacking on four specimens, although 

 setal pits may be visible ventrally, setae present ventrally on xiv 

 (1 seta) and xvi (6 setae) on one specimen. 



The secondary spermathecal apertures are wide slits; three pairs, 

 on 6/7-8/9. Each pore is 2-3 intersetal intervals wide transversely. 

 The anterior margin of the pore is slightly protuberant and minutely 

 lobulated. The posterior margin may or may not be protuberant 

 and lobulated. 



One of the specimens has a pair of female pores on xiv instead of 

 a single pore. 



The apertures of the copulatory chambers are longitudinal slits, 

 the median margin of the slit minutely lobulated, the lateral margin 

 smooth and firm. Tlie copulatory chambers of four of the speci- 

 mens are everted as conspicuously protuberant club-shaped bodies, 

 thickest ventrally, narrowing gradually ])assing dorsally. The nar- 

 row neck, a short portion almost at the level of the ventruni, is firm, 

 smooth, or with several very slight circumferential furrows. Ven- 

 tral to the neck portion the protuberance is softer, and the surface is 

 cross-hatched by numerous furrows. On the posterior face, close to 

 the neck, is a single genital marking, circular or oval. On the flat 

 ventral surface is a crescentic groove or slit, its concave side 

 facing mesially. The slit opens into a lumen, which is cres- 

 centic in section and which extends within the protuberance 

 nearly to or slightly into the neck. On the median wall of this lumen 

 there are three markings, two oval, one circular. One of the oval 

 markings is flat, without a raised margin and with a tiny, whitish, 

 conical protuberance, at the pointed end of which is the minute 

 male pore. A peripheral portion of each of the other markings is 

 slightly raised and rimlike, and on this rim is a fine groove or fur- 

 row, circular or oval in outline according to the shape of the mark'- 

 ing. There is no groove on the male pore area. Presumably the 

 copulatory chambers are only partially everted. Complete eversion 

 then would obliterate the lumen and bring the markings therein 

 onto the ventral face of the porophore. 



There are no external genital markings. 



Internal anatomy. — Septa 5/6-7/8 are muscular; 8/9 represented 

 by a membranous ventral rudiment; 9/10 lacking; 10/ll-12/i:i 

 muscular; 13/14r-14/15 strengthened but translucent. 



There is a glandular collar of grayish, finely granular appearance 

 on the esophagus just behind the gizzard. The intestine begins in 

 XV (4 specimens). The intestinal caeca are simple; without mai- 

 ginal incisions in one specimen, slightly constricted by the septa in 

 three specimens, with numerous lobulations of the ventral margin 

 in the abnormal specimen. The typhlosole begins just behind the 

 caeca. 



