412 



TRICOMA AND OTHER NEW NEMATODE GENERA, 



one-half as wide as the body, and is composed of small cells of 

 such a size that it takes about sixteen to build the ciicumference. 

 I could discover no ventral glaud. The lateral fields are one-third 

 as wide as the body. The tail is conical in the anterior third, 

 and continues thence, cylindrical — and one-third as wide as at the 

 anus, — to the sw^ollen terminus. The three elongated caudal 

 glands are confined to the tail. The vulva is large and somewhat 

 prominent. The eggs aie thin-shelled and more than twice as 

 long as the body is wide, and only one-fifth as wide as long. The 

 ovaries extend three-fourths the way back to the vulva, and 

 contain about a dozen developing ova. 



16- 



-M— 



17 



97-3 



.4 .g i- i- .g ^^ ■'■-^ """• The tail of the male resembles 



that of the female in form, but the caudal glands, instead of being 

 confined to the tail, extend forward beyond the 

 anus a distance equal to 

 the length of the tail ; 

 like those of the female 

 they are much elongated. 

 There is an accessory 



Fig. 10.— Synonchus fascicu 

 latus. 



I, male worm. II, head, 

 and III, tail of the same 

 woiiii more highlj' magnified. 

 IV, head of a young worm, 

 ventral view, to show the 

 three glands (drawn black) 



inside the oesophagus, one of sexual ors^an placed ven- 



which empties mto the oeso- ^ ^ 



phagus tube far behind the trallv and opposite the 



other two. V and VI, lateral -^ ^ ^ 



and ventral views respec- proximal ends of the Spi- 



cula. The latter are equal, 

 linear, slightly and uni- 

 formly arcuate, and are 

 slightly expanded at the 

 proximal end ; they are 

 half as long as the tail and 

 slide in accessory pieces 

 nearly half as long as they 

 themselves are. The acces- 

 sory pieces are supported 

 by a process which extends from the anus half- 

 way across the body. Two irregular rows of submedian hairs 

 become prominent opposite the spicula and on the tail ; there are 



tively of the male accessory 

 organ. 



a, pharj-nx. 

 6, nerve-ring, 



c, lateral organ. 



d, beginning of the intestine. 



e, caudal glands. 

 /, accessory organ. 



g, junction of the two tes- 

 ticles. 

 h, subventral hairs or papillae. 

 i, anus. 

 j, hairs. 

 k, tenninus. 

 I, ventral organ. 

 m, cells of I 

 n, anus. 



