^°-^^"^- PROCEEDI NGS OF THE NATIONAL MUSEUM. 229 



Plate XI. 

 Cittotmiia marmotw, from the Alpiue Marmot {Arciomys marmota). 

 I^iG. 1. Strobila, natural size. 



2-4. Three views of head. Zeiss, 4-a* 10. 



5. Enlarged dorsal view of strobila, mounted whole, showing internal anat- 



omy. No. 1370, U.S.N. M. 



Attention should be directed to the sudden development and equally 

 sudden atrophy of the ovarian tubules, to the lateral growth between 

 the ovary and lateral canal, and to the form of the uterus and the cirrus- 

 pouch. 



6. Diagrammatic transverse section of segment to show topographical anat- 



omy: P., cirrus; F., vagina; iV^., nerve; D. C, dorsal canal; V.C. ven- 

 tral canal. ' 



7-8. Two greatly enlarged figures, dorsal view, showing anatomy of seements 

 Fig. 7 after Stiles (in Stiles & Hassall, 1893, PI. VII, fig. 6). 



All figures were prepared from specimens collected at Briancon, France 

 by R. Blanchard. 



Drawn by Haines. 



Plate XII. 

 Cittotania marmota' and CHtotwnia denticidata. 

 Figs. 1-2. CUtoUrnia marmotw, from the Alpiue Marmot {Arciomys marmoUe). 



1. Dorsal view- of gravid segment. Zeiss, 4-a* 10. 



2. Oncosphere in the pyriform apparatus, escaping from the outer e-o-shell 



Greatly enlarged. "" 



3-8. CiUotanla dniiioilafa, from European Wild Rabbit (Lepxs mnicuhis) 



3. Strobila, natural size. No. 1328, U.S.N. M., one of Riehm's cotvpes of 



IHpyhdmm latissimum. For figures of Rudolphi's cotypes of Tamia den- 

 tiriilata see Stiles (in Stiles & Hassall, 1893, PI. V, figs. 4-7). 



4. Head and anterior portion. After Riehm, 1881, PL V, fig. 5. 



5. Lateral border of segments showing the gradual development of the 



cirrus. The numbers refer to the segments. After R. Blanchard, 1891B 

 fig. 22. ' 



6. Injected excretory system. After Riehm, 1881, PI. V, fig. 15. 



7. Transverse section (diagrammatic) of segment to sho'V topographical 



anatomy. Testicles are dorsal, accessory excretory canals ventral. 



8. Ventral view of segment, showing cirrus, cirrus-pouch, vas deferens, 



testicles, ovaries, vitellogeue glands, vagina, dorsal and larger ventral 

 canals. No. 1328b, U.S.N.M. Zeiss, 4-a* 10. 

 Drawn by Haines. 



Plate XIII. 

 CiUotwnia denticulata, from the European Wild Rabbit (Lepiis cuniculus). 

 Fig. 1. Half of segment to show the anatomy : re, retractor muscle of the cirrus- 

 pouch; V. d., vas deferens; p., prostata; r m"., inner layer of circular 

 muscles of the cirrus-pouch; I m,., longitudinal muscles; rm'., outer 

 layer of circular muscles; sp., spongy connective tissue; c, cirrus; 

 tJ., vagina; «., longitudinal nerve; r., dorsal canal; i:., ventral canal 

 system; rs., receptaculum semiuis; d., vitellogene gland; s., shell- 

 gland ; e., ovary ; w., uterus ; /., testicles. After Riehm, 1881, PI. VI, fig. 2. 

 The topography is not well preserved, ])ut this is probably a dorsal 

 view, as is shown by the position of the dorsal canal. If this interpre- 

 tation is correct, the vagina and vas deferens should run over the canals 

 and nerves instead of under, as given in the figure. See PI. XII, fig. 7, 



