ee  —V— 
AILMENTS AND DISEASES 

ally the carplike fishes, often in such numbers as to 
cause the death of both young and mature fishes, 
especially the very young. Other species which have 
freshwater fishes as hosts are G. carassiusculus, G. 
cochlea and G. tenuis. These parasites also attack the 
surface of fishes and amphibia and burrow into the skin 
under the scales, where they produce inflammations and 
raw surfaces which form seats for fungi and ultimately 
FIG, 80. Gyrodactyius elegans. cause the death of the fishes. Gyrodactylide are 
Saas ae among the most frequent parasites which affect the 
goldfish in the aquarium and breeding tank. 
The North American Aspidocotylea and Malacocotylea consist of 

w/ 
Paramphistomida, Fasciolide, Schistosomida, Holostomide, Gasterostomida, 
Didymozoinide and Monostomide; divided into 35 sub-families, 134 genera 
and 22 related genera, parasitic in Vertebrates, of which the following 
species are found in freshwater fishes and amphibia of the United States:— 

SPECIES Hosr Part INHABITED 
Distomum areolatum White Perch in intestine 
<< rufoviride Striped Bass | ‘f ae 
“< seriale | Salmon /<« kidneys 
“e tenue | Striped Bass |‘ intestine 
as ‘© tenuissime | White Perch << peritoneum 
“< auriculatum Lake Sturgeon | © intestine 
«e grandiporum | Eel | *< stomach 
<< gracile Sunfish, Goldfish | <« liver and intestines 
“< laureatum Sucker «« alimentary canal 
ee polymorphum Pike «« bladder 
een eupite!s (Red-eye Bass, Black Bass | __ { intestines, 
(and Goldfish 
(liver and heart, #!s°sills and 
surface 
Gasterostoma gracilescens Carp and other Cyprinide — ** intestines 
Octoplectanum affine Sun Fish << gills 
Stephanochasmus tenuis Striped Bass, White Perch _¢*_ intestine 
Tristoma elongatus Sturgeon “© gills 
Monostomum spatulutum Carp {ete << intestines and liver 
Me am fri Catfish «« bladder 
Cephalogonimus vesicaudus Softshell Turtle | €* intestine 
Distomum chelydre Snapping Turtle oS ae 
Pleorchis mollis Mud Turtle << Jungs 
Telorchis angustus Painted Turtle << intestine 
Amphistoma subclavatum Frog and Tadpole ew 
Brandesia areana Poe <¢ phyloris 
Distomum quietus “ <¢« intestine 
Gorgodero cygnoides << «¢ bladder 
pe amplicara << 3 ee 
or simplex << << mouth 
Halipegus ovocaudalus «6 ‘« liver 
Holostomum nutidus “e << intestine 
Ostioleum formosum “< i BCL 
Cymotocarpus hospitalis le oe “e 6 «e 
Distomum quietus | Salamander «< bladder 
ae ascoideum ‘Snails ¢< intestines, etc. 
a coronarium «« Molluscs, Alligator « << es 
147 
