Bull. U. S. F. C. 1899. (To face page 492.) 



Plate XXXI. 





341. Dtjitomum aXK frum Pomatnmu^ .sullulrix. sIcikUt variety, x 100. 



312. Spines on iiufk ci sam(.\ k 400. 



343. Oval variety, x 100. 



344. Spines on neck of samu. x 400. 



34.5. Probablysamespeeies, young, from I'aralic/il/ii/s (ioUattm. x 100. 



317. Distovmm plobiiionim Rutlolpiu (?). ironi PseadoptcuroHCClca 

 americani'tx. x 30. .'/. Genital aperture: .*, ovary; t, testes; 

 rf7. vitelline j^lands. 

 348. 7)/.s/«m/(/rt sp. from R<tjii l;t'vi-'>. X 8. 

 319. Same, in glycerine. Li-tlcr-' m-; in fii;. 347. X 14. 



346. Species near DiMomum pi/riforuif: Linton, from Sfemjtomun chry- 350. DUUniinm sp. from Gastf n,st>Hs Ins/iniosi,-''. x 100. 

 sops. X 100. " ' ■J-'^l- Young distomo from -l(■/(//■/^v/ fv, •,<///(&. x '220. 



[See tigs. 352-3.>l and descriptions in text.] 



