Monocotyle Floridana, a New M onogenetic Trematode. 



9 



and serves as the outlet of the uterus alone. It will at once be noticed 

 that the birth-pore is a very small opening and the uterus is a very nar- 

 row tube and that the egg which must pass through them is several times 

 their width. It is evident, consequently, that they must be capable of 

 great distention while the egg is being extruded. In fact, although no 

 individuals have come under my observation in which an egg is present 

 in the uterus, I have seen several individuals in which the terminal 

 portion of the uterus is very much distended and several times its usual 

 width. 



LITERATURE. 



Taschenberg, E. O. Helminthologisches. Zeitsch. f. d. gesammten Naturwiss. 



Bd. 51, p. 562, 1878. 

 Parona, C, e Perugia, A. Di alcuni trematodi ectoparassiti di pesci adriatici. 



Annali del Museo civico di Storia Naturale di Genova. Ser. 11 a, vol. ix, 



Goto, S. Studies on the Ectoparasitic Trematodes of Japan. 

 Imp. Univ. Tokyo, vol. vm, p. 229, 1894. 



Jour. Col. of Sci. 



l.m. 



9 ^ 10 



9. Transverse section of worm back of testis: X 25. 



10. Transverse section of worm where the intestinal trunks meet: X 2 



11. Transverse section of worm showinsr median trunk of intestine: X 



-5- 



Abbreviations used on Figures. 



a. n anterior nerve. 



b. p birth-pore. 



b brain. 



c. d centerof sucking-disk. 



d. p dorsal projection of 



sucker. 



e egg. 



e.t excretory trunk. 



fl flange of disk. 



gl glands. 



h hooks. 



* intestine. 



I lip. 



I. m longitudinal muscles. 



I. n longitudinal nerve 



(posterior). 



m mouth. 



m.t median trunk of in- 

 testine. 



o ovary. 



oot ootype. 



o. s oral sucker. 



ov oviduct. 



ph pharynx. 



p. p pharyngeal pocket. 



r. s receptaculumseminis. 



5 sucker. 



s. d sucking disk. 



s. )>: striated muscles. 



/ testis. 



t. p terminal pore. 



if uterus. 



v vagina. 



v. p vaginal pore. 



y. d yolk-duct. 



y. g yolk-glands. 



