Fig. 



87 A Stickleback affected with Schistocephalus solidus . . . 



Author's original. Enlarged 



88 A Section of Same, showing cysts . . ... .... 



Author's original 



89 Jscaris acus, a Nematod parasite ... 



After Cobbold 



90 Cocullanus elegans, a Nematod parasite . 



After Zeder 



91 Echinorhynchus proteus, an P>.T\l\\ocfp\ia\o\ii ■piXiiV.e . . . 



After Hamann and Westrumb 



92 Echinorhynchus angustntus, an Anthocephalous parasite . , 



After Busk 



93 Echinorhynchus anthuris, an Anthocephalous parasite . 



After Cobbold 



94 Carp Leeches attached to the head of a small-mouthed Black Bass 



Author's original 



95 Piiciola funduli, the Carp Leech . . 



After Diesing 



96 Trichodina fediculus, the polyp-louse . . , .... 



After Zernecke 



97 Hydrachna geographica, an Arachnid parasite ... 



Author's original 



98 Lernacera cyprinacea, a Crustacean parasite ... ... 



After Baird 



99 The Same, attached to the gill of a large-mouthed Black Bass . 



Author's original 



100 Argulus catostomi, a Crustacean parasite . .... 



Author's original 



1 01 Lymphosporidium truttce, a Protozoan parasite . .... 



After E. F. Smith 



102 Myxobolus sp. incert, a Sporozoan parasite . . 



■ After Gurley 



I0 2A The Same, on the head of a Goldfish . . 



Author's original, from life 



103 Myxobolus cypritti, a Sporozoan parasite 



Encysted in the kidney of a Carp. After Gurley 



104 Myxobolus ellipsoides, a Sporozoan parasite . . . 



Encysted in the tissues of the Air-bladder of a Tench. After Gurley 



104A Myxosporidium genus incert sp., a Sporozoan parasite 



Encysted in the skin and tissues of a minnow. After Linton 



105 Ichthyophthirius multijiliis, an Infusorian parasite .... 



After Fouquet 



1 06 Head of a Catfish afflicted with Ichthyophthirius multijiliis 



After Stiles 



107 Pantotrichum lagenula, an Infusorian parasite . . . ... 



After Kent 



108 Holotrichus mystacea, an Infusorian parasite 



After Kent 



1 09 Chromatophagus parasiticus, an Infusorian parasite .... 



After Kent 



1 10 Tetramitus nitschei, an Infusorian parasite .... ... 



After Weltner 



1 1 1 Saproleg7iiacea, Vegetal parasites . . . 



After Humphreys 



1 1 2 Floating Arrowhead, Sagittaria nutans . ... 



Author's original, from nature 



113 Fanwort, Cabomba caroliniana . . . 



Author's original, from nature 



1 1 4 Eel Grass, Vallisneria spiralis ... . ; . 



Author's original, from nature 



372 



