Fig. 
PLATE 10. 
14—Selerostomum vulgare, cephalic ex- 
tremity, female. 
15—Selerostomum vulgare, female, natura: 
size. 
16—Selerostomum vulgare, male natura] 
size. 
17—Selerostomum vulgare, caudal pouch 
male. 
18—Sclerostomum vulgare, cephalic ex- 
tremity, male. 
19—Seclerostomum vulgare, cephalic ex- 
tremity, female. 
20—Sclerostomum vulgare, cephalic ex- 
tremity, female. 
21—Triodontophorus Serratus, from throm- 
bus. 
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—Cylichnostomum Labiatum, cephalic 
extremity, female. 
28—Cylichnostomum Labiatum, male, nat- 
ural size. 
29—Cylichnostomum Labiatum, female, nat- 
ural size. 
30—Cylichnostomum Labiatum, caudal ex- 
tremity, male. 
xiii 
Inserted 
between pages 
120 and 12) 
