ARTHUE E. SHIPLEY. 



EXPLANATION OF FIGUEES. 



Fig. 1. — Transverse section through the head of D. antarciicus, showing the edges of the suckers curling 



in round some foreign body, probably mucous tissue of the host. 

 „ 2. — Transverse section of D. antarciicus in the region of the neck, showing the regular arrangement 



of the longitudinal muscles ; ac, excretory canals ; n.c, nerve cord. 

 „ 3. — Dbbothriocejjhalus scotti, x 2. 



„ 4. — The head and sucker of D. scotti, X about 2.5, two views. 

 „ 5. — Surface view of D. scotti, X about 25, showing anteriorly the genital opening, ff.p. ; the ova, ov., 



scattered in the uterus, and the yolk-glands, y.glcls. 

 „ 6. — Longitudinal section through two proglottides of D. scotti, showing median opening of uterus, 



o.ut., penis, ij., and opening of vagina, o.v. 

 „ 7. — Section through epidermis and external parenchyma of D. scotti. 

 „ 8. — View of D. u'ilsoni, x 15. 



