
AILMENTS AND DISEASES 

FIG. Si Dien FIG. 82 Diplosto- FIG. 83. Gaster- 
pret aimed mum cuttcola, a Trema- ostoma gracilescens, a 
Bete Greatly entered tod parasite. Greatly Trematod parasite. 
av : 3 enlarged. Greatly enlarged. 

Cesropa ork Tapeworms. ‘This group comprises the Tapeworms 
and other cystic Entozoa which are parasitic during the greater part of 
their lives; with some species the eggs only are free during certain periods 
to change their residence. The Cestoda are taken as one group or sub-order, 
the Pseudophyllide, which consists of five families, the Bothriocephalida, 
Tetraphylhda, Cyclophyllide, Diphylliida, and Trypanorhycha; divided into 
16 sub-families, 72 genera and 28 related genera, parasitic on Vertebrates, 
of which the following species are found in freshwater fishes and amphibia 
of the United States :-— 
SPECIES 

Bothriocephalis proboscideus 
<e nodosus 
Cyathocephalus truncatus 
Dibothrium hastatum 
Os cordiceps 
es infundibulifor me 
Dacnitus globosa 
Ligula simp licissima 
“© catostomi 
Monobothrium hexacotyle 
“6 terebrans 
Schistocephalus dimorphus 
“< solidus 
Tenia sevelini 
<< gcellata 
ae dilatata 
Triculpidaria nodulus 

FIG, 84 Bothriocephalis 
proboscideus, a Cestod para- 
site. Twice natural size. 
Hosr 
Carp and other Cyprinide 
Stickleback 
Whitefish 
| Sturgeon 
Trout 
Burbot and Whitefish 
Trout 
Carp and Tench 
Sucker and Chub 
Sucker 
«« and Chub 
Sculpin, etc. 
Stickleback and Cyprinide 
Whitefish 
Rock Bass 
Eel 
Bass, Perch and Pike 

mals. 



FIG. 85 Ligula 
simplicissima, a Ces- 
tod parasite, 
ural size of imma- 
* ture form, the adult 
i is parasitic in Mam- 
Part INHABITED 
in phylorus and intestines 
<< alimentary canal 
<« phyloris 
«« intestine 
ce ce 
ce ce 
<* body cavity 
«ce “ce “ce 
«* intestine, etc. 
ee ce 
ce ce 
<< abdominal cavity 
“ce 6e ‘cc and muscular 
tissues 
«« intestine 
ce €<« 
“e “ce 
ce ce 
FIG. 86 Schis- 
tocephalus solidus, a 
Cestod parasite. 
Immature form, 6 
to 15 mm. long, the 
adult is parasitic in 
Aquatic Birds. 
Nat- 

