PLATE 10. 



Fig. 14 — Sclerostonmni vulgare, eeplialic ex- 

 tremity, female. 



" 15 — Sclerostomum vulgare, female, natural 

 size. 



" 16 — Sclerostomum vulgare, male natural 

 size. 



" 17 — Sclerostomum vulgare, caudal pouch 

 male. 



" 18 — Sclerostomum vulgare, cephalic ex- 

 tremity, male. 



'' 19 — Sclerostomum vulgare, cephalic ex- 

 tremity, female. 



'' 20 — Sclerostomum vulgare, cephalic ex- 

 tremity, female. 



" 21 — Triodontophorus Serratus, from throm- 

 bus. 



n 22— Triodontophorus Serratus, cephalic ex- 

 tremity, female. 



'' 23 — Triodontophorus Serratus, male, nat- 

 ural size. 



*' 24 — Triodontophorus Serratus, female, nat- 

 ural size. 



" 24a — Triodontophorus Minor, cephalic ex- 

 tremity, female. 



" 25 — Triodontophorus Minor, male, natural 

 size. 



' ' 26 — Triodontophorus Minor, female, nat- 

 ural size. 



" 27 — Cylichnostoinum Labiatum, cephalic 

 extremity, female. 



" 28 — Cylichnostomum Labiatum, male, nat- 

 ural size. 



'' 29 — Cylichnoswmum Labiatum, female, nat- 

 >. ral size 



* * 30 — Cylichnostomum Labiatum, caudal ex- 

 tremity, male. 



xiii 



Inserted 



between pages 



120 and 121 



