104 



PROCEEDINGS OF TBE NATIONAL MV8EUM. 



VOL. 50. 



pair of very large papillae some distance anterior of the cloacal aper- 

 ture; there are two pairs of smaller adanal papillae; the inferior lip 

 of the cloacal aperture bears 3 postanal papillae, of which the 

 median is unpaired; and there is one pair of very small papillae 

 toward the posterior third of the caudal extremity. The incon- 

 spicuous spicule is only 65 /i long. 



FeTnale 5.5 mm. long, with a maximum thickness, exclusive of the 

 alae, of 310 n. The cervical alae extend very little beyond the vulva. 

 The tail is conical and has a length equal to 

 a fifth of that of the body. The vulva (fig. 

 131) is not prominent and is situated a little 

 posterior of the anterior third of the body. 

 The very long ovijector is remarkably com- 

 plex; the vagina is 

 Aery short and 

 communicates with 

 a long vestibule, 

 1.7 mm. long, char- 

 acterized by the 

 thickness of its 

 muscular tunic and 

 lined with a thick 

 cuticle; this vesti- 

 bule turns back on 

 itself and extends 

 posteriorly in a 

 windino; course to 



large ovoid 



Fig. 130.— Dermatox^'s getu- 



LA. Row OF CRESTS ON VEN- 

 TR^VL SURFACE OF MALE. EN- 

 LARGED. After Seueat, 

 1915a. 



Fig. 131.— Dermatoxts ge- 

 TULA. Female body in 



REGION OF vulva. EN- 

 LARGED. After Seurat, 

 1915rt. 



sphincter, 250 [jl 



long and 100 ^ 



thick, and c o n - 



spicuous from its 

 deep, almost black, color ; this sphincter has a very narrow lumen and 

 eggs do not remain in it any more than in the vestibule ; bcj'ond the 

 sphincter is the tubular ovijector, a large sac filled with eggs and ex- 

 tending posteriorly to the level of the anus, where it divides to form 

 the two uteri ; these extend anteriorly to the level of the vulva, where 

 they are connected with the ovaries by a very short oviduct curved 

 in the form of a letter S; the uteri are straight and contain only two 

 or three rows of Qg:g?.\ one uterus descends posterior of the anus for 

 a third of the length of the tail and then extends anteriorly; the 

 ovaries are blackish and are folded on themselves in the dorsal re- 

 gion between the vulva and the esophageal bulb. The eggs have a 

 thick shell and are 55 to 60 ix long and 25 /^ thick. 



