IV CONTENTS. 



Fishes continued I-AGR 



The Amblyopsidae 7 



Relationships of the Amblyopsidae 7 



Distribution of the Ami ilyopsidas ... 71 



Amblyopsis spelaits . . 7 1 



Troglichtliys rflsa- .............. 72 



Typltlichthys ... 72 



TypMichthys siiHerraiifiis 73 



Typhlichtliys osborni 74 



Typhlichthys -wyamiiittf 75 



............. 75 



>- (iiipilliffrus 75 



76 



The color of the Amblyopsidse ... ..... 76 



General habits <>l .7////</n'/w-> 80 



Respiration ................ 81 



Feeding habits of. 4ni/>lyi>/>sis . . . . . 81 



Habits of t'/n>fi>s,'iis/?>- . 85 



Reactions t.. Light . 87 



Breeding habits of Anihlyvpsis ............. 92 



Rivalry of Males and Secondary Sexual Differences .... .... 93 



The Egg and Central Development of Amblyopsis . . . . 94 



The Migration of the Anus .... 95 



The Tactile Organs 96 



The Ear of Aiiihlynpsis .............. ico 



Dots . li/>ly<>p*ii " hear "? . . . . . . . . .102 



The Brain nl ' Ain/'l\'i>psis 106 



< onclusions on the Amblyopsidze . 109 



The eyes of the Amblyopsidae . . . . . .no 



Cholo%aster papillifenu ...... . ... no 



c7//;w >Av iii, r ii\.\i:ii ..... . . . . 116 



(."//"/( V' v/ ' v ' turniilns ..... ... 117 



Typhlichthys suiterraneus ............. 120 



Troglichthys rostz .............. 126 



sl/>i/i/\'n/>\j.>i s/iftirns . . . . . . 134 



Summary of the Eyes of the Amblyopsidae . .......... 145 



I >i velopment and Later History of the Eye of Amblyopsis ........ 147 



Growth of the Eye from Time of its Appearance . . . 157 



History of the Lens .............. 158 



Histmy "I tin- Si 1. r.il (', i Milages 158 



History of the Optic Nerve ............. 159 



History of the Development, Maturity, and Degeneration of the Eye ..... 160 



( 'omparativt: K.it. ni ( intn^, nctic and 1'hyliigenetic Degeneration of the parts of the Eye 164 



The KutiiiT i if the Eye 166 



Retardation and Cutting off of Late Stages of the Development of the Eye .... 166 



Retardation and Cessation in the Development of the Eye ..... 167 



Thi I .. i -s r>f .-/wM'()/>v/v .UK! the law of Biogenesis ........ 170 



CoiH-hision ......... . 173 



(icnt-ral Snmniarial Accmini nl the eyes of the Amblyopsidae ....... 175 



rinli-tic I ' the eye of the Amblyopsidse . ....... 175 



Ri -Milts ni I'hvli'tu Degeneration on the Different Parts of the Eyes of the Amblyopsidse . 177 



Out. ration ............. 180 



I'l.n , I'hylctic Degeneration in the Amblyopsidae ...... i.So 



The i nd Fishes . 183 



185 



lion of Stygicola and Ltiafugu ......... 187 



1'iini Secondary Sexual Characters 187 



iilintii.il lit .s'/i- s v ,!.! .mil /,, i/'n^i .......... 188 



