CONTENTS. 



Branch IX. — Vertebrata .... 

 Class I. — Tunicata. /. S. Kings 



FAOB 

 1 



ley 53 



Sub-Class I. — Tethyoida ... 56 



Order I. — Copelat^ .... 56 



Order II. — MonascidijE ... 56 



Order III. — Synascidle . . 57 



Order IV. — Lucle 59 



Sub-Class II. — THALiAciiE ... 59 

 Order I. — Cyclomyarla . . . 59 

 Order II. — Desmomyaria . . 60 

 Class II. — Ackanla. Samuel Gar- 

 man 62 



Class III. — Cyclostomi. J. S. Kings- 

 ley 65 



Order I. — Hyperoartia ... 65 



Order II. — Hyperotretia . . 67 

 Class IV. — Elasmobranchii. /. S. 



Kingsley 68 



Sub-Class I. — Holocephali ... 71 



Sdb-Class II. — Plagiostomi ... 72 



Order I. — Squali 72 



Order II. — Rai« 84 



Class V. — Pisces 90 



Sub-Class I. — Ganoidea. /. S. 



Kingsley 90 



Order I. — Acanthodini ... 92 

 Order II. — Placodermi ... 92 

 Order III. — Chondrostei . . 92 

 Order IV. — Pycnodontini . . 94 

 Order V. — Crossopterygii . . 95 

 Order VI. — Ginglymodi . . 96 

 Order VII. — Halecomorphi . 97 

 Sub-Class II. — Teleostei ... 98 

 Order I. — Symbranchii. Theo- 

 dore Gill 100 



Order II. — Apodes. Theodore 



Gill 100 



Order III. — Lyomeri. Theo- 

 dore Gill 109 



Order IV. — Opisthomi. Theo- 

 dore Gill 110 



Order V. — Nematognathi. D. 



S. Jordan 110 



PAOE 



Order VI. — Scyphophorl D.S. 



Jordan 121 



Order VII. — Teleocephali . 121 

 Sub-Order I. — Gymnonoti. 



D. S. Jordan 123 



Sub-Order II. — Eventogna- 



THL D. S. Jordan .... 125 

 Sub-Order III. — Isospon- 



DYLI. D. S. Jordan . . . 134 

 Sub-Order IV. — Haplomi. 



D. S. Jordan 168 



Sub-Order V. — Xenomi. 



D. S. Jordan 173 



Sub-Order VI. — Synentog- 



NATHi. Theodore Gill. . . 173 

 Sub-Order VII. — Perces- 



OCES. Theodore Gill . . . 176 

 Sub-Order VIII. — Acan- 



THOPTERYGii. Theodore Gill 181 

 Sub-Order IX. — Hyposto- 



MIDES. Theodore Gill . . . 262 

 Sub-Order X. — Rhegnop- 



terl Theodore Gill . . .262 

 Sub-Order XI. — Discoceph- 



ALi. TTieodore Gill. . . . 263 

 Sub-Order XII. — T.«nio- 



SOML Theodore Gill. ... 265 

 Sub-Order XIII. — Xenop- 



TERYGii. Theodore Gill . . 267 

 Sub-Order XIV. — Anacan- 



THINL Theodore Gill . . .267 

 Sub-Order XV. — Hetero- 



somata. Theodore Gill . . 275 

 Order VIII. — Hemibranchh. 



Theodore Gill 280 



Order IX. — Lophobranchii. 



Theodore Gill 285 



Sub-Order I. — Solenostomi 285 

 Sub-Order II. — Syngnathi . 285 

 Order X. — Plectognathi. 



Theodore Gill 286 



Sub-Order I. — Sclerodermi 287 

 Sub-Order II. — Ostraco- 



dermi 288 



