No. 2322. TREMATODE FAMILY HETEROPHY I DAE— RANSOM, 



553 



APOPHALLUS BREVIS, new species. 



Fig. 21. 

 1920. ApopliaJhis hrevis Ransom, 1920 (the present paper) (in Lariis dela- 

 warensis; U. S.). 



SpecifiG diagnosis. — Apophallus: Length, 0.6 to 0.9 mm.; "width, 

 0.13 to 0.26 mm. Cutaneous scales about 4 [jl long bj^ 2 p. wide. Oral 

 sucker, 30 to 50 pi, in diameter; prepharynx not over 20 [i in length; 

 pharynx, 20 to 28 ;;. in diameter. Bifurcation of intestine about one- 

 third the body length from the anterior end. Ventral sucker in 



lOOii 



20 



21 



Figs. 20-21. 20.— Apophallus muehlingi. Ventral view, x about CO. After Muehling, 1898. 

 21.— Apophallus beevis. Ventral view, x 110. Opjginal. [For explanation of letteeing 



SEE footnote, p. 532.] 



about the middle of the body, 35 to 55 p, in diameter, opening to the 

 exterior through the genital pore. Right testis usually obliquely 

 behind the left, but the two may be located side by side right and 

 left of the median line, 45 to 145 ]x in transverse diameter, 45 to 120 [jl 

 in longitudinal diameter. Distance of posterior testis fom the pos- 

 terior end of the body at least as great as the longitudinal diameter 

 of the testis. Seminal receptacle, 40 to 80 [x in diameter. Ovary, 

 globular or oval, 50 to 80 (x in transverse diameter, 60 to 90 pi in 

 longitudinal diameter. Vitellaria extend anteriorly a short distance 



