PROTRELLUS, COLPURELLA 257 



the cardiac bulb, in fact, and from it the vagina and long single uterus are di- 

 rected backward, the vagina being highly muscular, and in its contracted condi- 

 tion thrice as long as the body is wide. The uterus ends and the ovaries begin 

 near the commencement of the posterior third of the body. There are numerous 

 fusiform, slightly curved eggs, measuring 50 X 104 microns, the shells of which 

 acquire a bright yellow color on entering the uterus. In many cases these golden- 

 shelled eggs give the nemas, when seen with the unaided eye, a bright yellow 

 appearance. The ovaries extend forward, then backward again; the ova are 

 arranged single file. The eggs in the proximal part of the ovaries and in the 

 uterus have the less-pointed end saddled with a peculiar organ. The saddled 

 end of the egg is directed away from the vulva. 



.8 10. 21. M W. _ 



z.~5 iTv *~6 7.8~-f-TjT ' " On the very much smaller male, the plain, 

 transverse striae measure 3 microns apart on the neck, and 2 microns on the 

 body. There is no distinct boundary between the rounded head and the conoid 

 neck. The lips are very small and connate. Small, low, refractive papillae 

 occur near the margin of the head. The somewhat irregular pharynx is half as 

 deep as the head is wide, and about two-thirds as wide as deep. The anterior 

 three-fifths of the oesophagus is a tube two-fifths as wide as the middle of the 

 neck, the remaining two-fifths being flask-shaped, the neck of the flask being 

 somewhat narrower than the anterior tube, and the ovoid bulb being two-thirds 

 as wide as the neck. Cardiac collum, though shallow, distinct. The thin- 

 walled intestine is at first at least two-thirds as wide as the body. The nerve- 

 ring encircles the oesophagus squarely. The tail diminishes rapidly behind the 

 anus, until only one-third as wide as at the anus. There are three pairs of papil- 

 lae, all sub-ventral : one pair of conical papillae, the largest of all, just in front 

 of the anus; a second smaller pair somewhat behind the anus; and a third pair 

 near the middle of the tail. The single linear, acute spiculum makes an angle 

 of 45 with the axis of the body; its length equal to that of the narrow part of the 

 tail. Testis-flexure such that the cardia lies half way between it and the nerve-ring. 

 Habitat: Rectum of the cock-roach, Polyzostaria melanaria Erich., Moss Vale, 

 New South Wales, Australia, August 17, 1894. Examined in water. 



(.6)7.6 . *>. '=* 98. 1( . 



39. Colpurella fontinalis n. sp. UJ l - 9 " 2 ' 2 Cuticle thick, 



naked. No labial papillae. Pharynx very long and tubular. 

 Neck cylindroid posteriorly. The oesophagus is at first three- 

 fifths, near the nerve-ring two-fifths, and finally two-thirds, as 

 wide as the base of the pharynx. It is a little narrower through 

 the middle, so that one may detect a faint posterior swelling. 

 No cardia. The thick-walled intestine, which has a faint 

 lumen, is separated from the oesophagus by a collum one-fourth 

 as wide as the neck, and becomes at once one-half as wide as the 

 body. Numerous, minute, uniform granules occur in the cells X 750 

 of the intestine. Renette unknown. Female unknown. Five 

 somewhat equidistant, papillate supplementary organs, one- 

 third as high as the cuticle is thick, occupy a distance equal to 

 two and one-half times the length of the body-diameter. The 

 posterior supplement is near the proximal part of the spicula. 

 The organs are wider apart anteriorly. Oblique copulatory IfOl. 

 muscles coextensive with the supplements. Exact form of the testes unknown. 



Habitat: Spring, at Country Club, Washington, D. C., U. S. A. Sublimate to 

 balsam. Fig. 39. n, designates a caudal pocket, and not the anus, which is 

 farther forward. 



