XVI CONTENTS. 



PAGE 



pike, Saury, Half-beak, Flying Fish), 619— Esocidse (Pike), 

 623 — Galaxiidse, 624 — Mormyridae, 625 — Stemoptychidse, 

 627— Stomiatidffi, 629. 

 Families of Physostomi continued — Salmomdce : Salmo, difficulty 

 , of distinguishing species, 630 ; constant specific characters, 

 635 — hybrids, 638 — sexual development, 638 — migratory 

 species and their retention in freshwater, 639 — Growth of 

 Salmonoids, 641 — their domestication and acclimatisation, 

 641 — species enumerated, 642 — Smelt and Capelin, 646 — Cor- 

 egonus, 647 — Grayling, 649 — marine genera, 650. 

 Families of Physostomi continued: Percopsidae, 651 — Haplochi- 

 tonidse, 651 — Gonorhynchidse, 652 — Hyodontidse (Moon-eye), 

 653 — Pantodontidse, 653 — Osteoglossidse, 653 — Clupeidse 

 (Herrings, Anchovies, Shads, Mossbanker, Menhaden, etc.), 

 655 — BathythrissidEe, 663 — Chirocentridse, 663 — Alepocepha- 

 lidse, 664 — Notopteridse, 664 — Halosauridae, 665 — Hoplopleu- 

 ridse, 665 — Gymnotidae (Electric Eel), 666 — Symbranchidas, 

 668 — Muraenidse (Eels, Congers, Muraenas, etc. ), 669. 



FeFTH OeDER — LOPHOBKANCHII 678 



Families : Solenostomidae, 678 — Syngnathidse (Pipe-fishes, Sea- 

 horses), 679. 



Sixth Orber — Plectognathi 683 



Families : Sclerodermi (File-fishes, Coffer-fishes), 684 — Gymno- 

 dontes (Globe-fishes, Sunfish), 686. 



Third Sub-class — Ctclostomata. 



FamiUes : Petromyzontidae (Lampreys), 691 — Myxinidae, 694. 



Fourth Sub-class — Leptocardii. 



Family : Cirrhostomi (Lancelets), 696. 



APPENDIX. 



Directions for Collecting and Preserving Fishes . 697 

 Alphabetical Index 707 



