76 NORTH AMERICAN 



From the inconspicuous vulva the vagina leads inward at right angles to the 

 ventral surface about half way across the body, where it joins the two sym- 

 metrically-placed uteri. The reflexed ovaries reach about half way back 

 to the vulva and contain half a dozen or more developing ova arranged 

 somewhat irregularly. The thin-shelled, ellipsoidal eggs are about as long 

 as the body is wide and about three-fifths as wide as long. They have been 

 seen in the uterus one at a time, and apparently are deposited before seg- 

 mentation begins. 



3. 15. 23. -M- 85. 



.5 mm. 



1.8 3.4 3.8 4-2 34 



The tail of the male is conoid in the anterior three-fourths in such 

 fashion that the beginning of the final fourth has a diameter of about one- 

 eighth that of the base of the tail ; thence onward the tail is nearly cylin- 

 drical or expands slightly, and ends in a rounded terminus bearing an api- 

 culum forming an unarmed spinneret. The caudal glands are located in the 

 base of the tail. In front of the anus in the male there is a ventral row of 

 eight or nine protrudable. obscurely S-shaped, yellowish supplementary or- 

 gans. These appear to be of rather uniform size and are equally spaced. 

 Their length is somewhat greater than that of the radius of the body, and 

 they are placed at an angle of about thirty degrees to the body axis. They 

 are of rather uniform diameter throughout their length, but taper a little 

 toward the blunt distal extremity, and are obscurely cephalated at the 

 proximal ends. The distal extremity of the hindermost of these organs is 

 located nearly opposite the proximal ends of the spicula. The entire distance 

 occupied by the series is about one and one-half times as great as the length 

 of the tail. The two equal, tapering, strongly arcuate, brownish yellow spicula 

 are about one and one-half times as long as the anal body diameter. Their 

 proximal ends are cephalated by expansion, and extending from the proximal 

 ends toward the distal extremities there are straight, refractive lines indicat- 

 ing possibly that there is more to the framework of the spicula than appears 

 at first glance. The spicula curve inward and backward to near the dorsal 

 side of the tail, and then pass forward so that their proximal extremities lie 

 opposite the body axis. The spicula are accompanied by a rather straight, 

 slender, slightly tapering, blunt accessory piece applied to their distal fifths. 

 From this point the accessory piece extends inward and backward at an 

 angle of sixty degrees, and ends a little to the dorsal side of the 

 body axis. At their widest part, just behind the cephala, the spicula 

 have a width about one-fifth as great as that of the corresponding portion of 

 the body. A little behind the middle of the tail there are two ventrally sub- 

 median setae, about half as long as the corresponding diameter of the tail. 

 The ejaculatory duct is about one-third as wide as the body. There are two 

 testicles, one extending forward and the other backward. The blind end of 

 the anterior testicle is a little farther behind the base of the neck than the 



