174 



CESOPHA.GOSTOMA COLUMBIANUM, Curtice. 

 Plate XXIV. 



Fig. 1. Adult male, X9, Fig. la, natural size. 



Fig. 2. Adult female, x9, Fig. 2a, natural size. 



Fig. 3. Cephalic end of adult, ventral view: a, bead; b, ossophagus; c, lateral 

 canals opening on head; d, unicellular glands and ducts uniting and 

 emptying at e, the ventral orifice; /, a fold of the sUin which forms a half 

 riug on the ventral side of the neck ; the orifice e opeus unc'er it ; g, g, two 

 pointed neck papillie; li, h, narrow membranous wings; i, intestine. 



Fig. 4. Caudal end of adult female lateral view, x45 (about) : a, anus; b, vulva; c, 

 vagina; rf,(J, uteri; e, e, oviducts; /,/,/, loops of the ovaries ; i, intestine. 



Fig. 5. Head : a, mouth ; b, b, papilliB of the two lateral ducts ; c, c, two of the four 

 acute, pointed papillse opening on the head ; d, d, cross-section of cavity of 

 the head ; e, e, cross-section of a circular canal, which runs around the base 

 of the head ; /, chitinous armature of the head ; g, cosophagus ; It, its three 

 chitinous supports. 



Fig. 6. Chitinous armature, top view : a, chitinous ring ; b, outer teeth ; c, inner 

 teeth; d, triradiate pharyngeal orifice; e, e, e, the cuds of the ojsophageal 

 rods. Four of the outer teeth have been removed to better show the inner 

 row. A side view of this apparatus is presented in Fig. 5. 



Fig. 6(1. Top view of teeth. 



Fig. 6b. Side view of teeth and basal support. 



Fig. 7. The bursa sijread out : a, ventral rib ; J, veutro lateral ; c, lateral; (J, dorso- 

 lateral; e, dorsal; /, the cloacal orifice with two papillie behind. 



Fig. 8. Spicula of male, composed of a chitinous tube surrounded by a meinbraue 

 with a narrow wing. 



Fig. 8a. Portion of spiculum. 



Fig. 9. Eggs : a, a, as they appear when deposited ; b, eggs in uterus. 



Fig. 10. Bursa of male, side view: a, a, a, ribs ; b, spicula ; c, c, anal papillae. 



Fig. 11. Head, top view: a, mouth; b, b, lateral papillae; c, oue of the four acute 

 papillae. 



