Description of Plate XI. 
Figure. 
31. Cylichnostomum 
Dorsal view. 
82. Cylichnostomum 
38. Cylichnostomum 
34. Cylichnostomum 
view. 
85. Cylichnostomum 
36. Cylichnostomum 
37, Cylichnostomum 
38. Cylichnostomum 
39. Cylichnostomum 
40. Cylichnostomum 
view. 
41. Cylichnostomum 
42, Cylichnostomum 
43, Cylichnostomum 
Dorsal view. 
44, Cylichnostomum 
45, Cylichnostomum 
view. 
46. Cylichnostomum 
47, Cylichnostomum 
tetracanthum. Cephalic extremity of male. 
tetracanthum, Male. 
Female. 
Natural size. 
tetracanthum. Natural size. 
nassatum, Cephalic extremity. Female. Dorsal 
nassatum, Male. Natural size. 
nassatum. Female. Natural size. 
bicoronatum. Caudal extremity. Female. 
bicoronatum, Male. Natural size. 
bicoronatum, Female. Natural size. 
radiatum, Cephalic extremity. Female. Dorsa) 
radiatum. Male. 
radiatum. 
bicoronatum, 
Natural size. 
Natural size. 
Cephalic 
Female. 
extremity. Female. 
bicoronatum, Anterior view. Mouth. Female. 
labratum. Cephalic extremity. Female. Dorsal 
labratum. 
labratum. 
Male. 
Female. 
Natural size. 
Natural size. 
