VI 



Sub-Order Haplomi (141-144) 14 



Sub-Order Isospondyli (145-173) .... 15 



Sub-Order Eventognathi (174-178) . . . . 17 



Sub-Order Gymnonoti (179-180) .... 18 



Order Scyphophori (181-182) xxxviii .... 18 



Order Nematognathi (183-192) xxxviii .... 18 



Order Apodes (193-204) xxxviii 19 



Sub-Order Ichthyocephali (193) . . . . .'19 



Sub-Order Holostomi (194-195) 20 



Sub-Order Enchelycephali (196-198) ... 20 



Sub-Order Colocephali (199) .... 20 



jOrder Opisthomi (205-206) xxxix .... 21 



Sub-Class Ganoidei (208-214) ix, xxii ... 21 



Super-Order Hyoganoidei (208-209) xxxi ... 21 



Order Cycloganoidei (208) 21 



Order Rhomboganoidei (209) 21 



Super-Order Chondroganoidei (210-211) xxx ... 21 



Order Chondrostei (210-211) ... 21 



Order Selachostomi (211) .... 21 



Super-Order Brachioganoidei (212) xxx .... 22 



Order Crossopterygia (212) . . . . 22 



Super-Order Dipnoi (213-214) xxx . . ' ; . . 22 



Order Sirenoidei (213-214) .... 



Series and Sub-Class Elasmobranchii (215-240) xx 22 



Super-Order Chimaerae (215) xx . . . 22 



Order Holocephali (215) .... 22 

 Super-Order Plagiostomi (216-240) xx . . . 



Order Raiae (216-223) 22 



Sub-Order Masticura (216-218) .... 



Sub-Order Pachyura (219-223) .... 23 



Order Squali (224-240) 



Sub-Order Rhinae (224) .... 23 



Sub-Order Galei (225-240) 23 



Class Marsipobranchii (241-243) xix 24 



Order Hyperoartii (241) 24 



Order Hyperotreti (242-243) 25 



Class Leptocardii (244) xix . 25 



Order Cirrostomi (244) ...... 25 



III. BIBLIOGRAPHY . 27 



IV. INDEX .,,. 47 



