Bui. U S F. C 1899. |To lace Dage 492.) 



Plate XIX. 



224 



222 





\,:r:<^'' 



j0^: 



226 



mmrm 







li'i^mML 227 



'ii 



.!.■- :-.,.i„,,lK'm;l 



lli!i:i#i 



m 







*r^■to.^*i 



220. Lecmwcephaliis aimulatui^ Molin, from Rocms lincaliis. Ht-ml, 



dorsal view, x 300. 



221. Hea<). ventral view, x 300. 



222. I'ortion of two dentiperous rows, near middle of body, x :'.00. 



223. Posterior end. ventral view, showing spicules and p;tpilla>. 



X 800. 



224. Undetermined nematode from stomarli of Mncrourns huirdii. 



X 12. 



220. (E.sophageal region of a specimen with anterior cud .slightly 

 retracted, x (>!i. vt', Beginning of mascuhir sheath; m, m. 

 continuation of same posteriorly; /', intestine; oc, tesophagus. 



22G. Anterior end ol specimen with sp"ines. x 200. 



227. Genital aperture of female, x 300. 



