278 T. B. ROSSETER ON DREPANIDOTAENIA SAG1TTA. 



arrived at, and must be my apology for forming a new and dis- 

 tinct species for this avian tapeworm. I propose to name this 

 species Drepanidotaenia sagitta. 



Explanation of Plate 20. 



Fig. 1. Scolex with suckers, x 70. 



„ 2. Hook from rostellum, x 2,500. 



„ 3. Male organs in segment, x 70. 



,, 4. Female ,, „ ,, X 70. 



„ 5. Uterine segment with staphylitic pouches, x 70. 



,, G. Segment filled with six-hooked brood, or hexacanth stage 

 of development, x 70. 



,, 7. Eggs from same, showing pockets and catch-spring arrange- 

 ment of polar axis, x 350. 



,, 8 and 9. Male and female genital pores with male organ 

 protruded previous to copulation (diagrammatic). 



[a, cirrus ; b, vesicula seminalis ; c, vas-deferens ; d, spatulate 

 monotestis ; e, vagina ;f, vaginal canal ; g, receptaculum seminalis, 

 with fructifying duct ; hit. proximal and distal ovaries ; i } j, shell 

 and yelk glands.] 



Journ. Qaekett Microscopical Club, Ser. 2, Vol. JX., No. 58, April HOC. 



