292 



ORDER SYNONCHIA 



the posterior portion of the pharynx bears one of these onchia. The oesophagus 

 gradually diminishes so that at no great distance behind the head it is but little 

 more than half as wide as the neck, and continues thus throughout. There is a some- 

 what small, hemispherical cardia about one-third as wide as the base of the neck. 

 The intestine becomes at once about three-fourths as wide as the body. In cross- 

 section it presents four to six cells, manifestly of two different kinds, one of which, 

 a minority, is much more distinctly granular than the other and is more numer- 

 ous in the anterior portion of the intestine than in the posterior. The limits of 

 each cell, of whichever kind, are rather clearly marked on account of the refrac- 

 tive nature of the cell-walls. The cells are packed with a multitude of fine, 

 nearly colorless granules. The anus is prominently raised; the rectum is as long 

 as the anal body diameter. The tail is conoid to the convex-conoid terminus, 

 which forms a convex-conoid, somewhat truncate spinneret of large size, in which 

 is the group of large ampullae of the caudal glands, which nearly fills the terminus, 

 its diameter being about half as great as that of the base of the tail. The large 

 caudal glands are located in a close tandem just behind the anus, in the anterior 

 two-thirds of the tail. The lateral fields are fully one-third as wide as the body, 

 and contain cells of unusual size, of such a width as to reach nearly across the 

 fields themselves. These cells are not contiguous, and there are found with 

 them in the lateral field cells of small size. Renette unknown. From the ele- 

 vated vulva the vagina leads inward half way across the body, where it joins the 

 single uterus, which extends backward. The ovary reaches about half way back 



to the vulva and contains 

 six to twelve developing 

 ova, of which the larger 

 ph are arranged single file. 

 The eggs appear to be 

 elongated, somewhat 

 murph longer than the body is 

 wide and about one-third 

 as wide as long. The anus 

 of the male is prominently 

 raised. In front of it there 

 is a ventral series of sup- 

 plementary organs occu- 

 pying a space equal to six 

 to eight body-diameters. 

 The hindermost of these 

 organs is located opposite 

 750 the posterior part of the 

 spicula, and the penultimate opposite the middle of the spicula, and the third 

 from the last nearly opposite the proximal ends of the spicula; the series contin- 

 ues along the ventral line with a somewhat equidistant arrangement, the total 

 number of supplements being at least sixteen. Each supplement is a somewhat 

 narrow cutinized structure of small size, extending outward and backward, and 

 its distal extremity is capable of being exserted. These organs are not very con- 

 spicuous. A few submedian setae are seen near the anus, one pair opposite the 

 distal parts of the spicula, and one or two on the bulky portion of the tail. The 

 slender, uniform spicula have their proximal ends located opposite the body- 

 axis. The width of the spicula is not much greater than that of the surrounding 

 nuclei, in other words, the spicula are quite slender. They are accompanied 



