288 



INDEX 



tables, 267 (Figs. 332-337); ab- 

 dominal pores, tables, 271 ; brain 

 of, 273 (Fig. 342). 



Chim.-eroids, in classification, 7, 8; 

 antiquity of, 9, 10 ; gill shields, 20; 

 affinities to shark, 96; general de- 

 s-ription of, 99-115 (Figs. 104- 

 120); anatomy of, 99-101 (Fig. 

 104); skeleton of, 101-103 (Fig. 

 105); embryology and larval his- 

 tory of, 103; fossil Chimseroids, 

 103, 104 (Fig. \o^A); living Chi- 

 maeroids, description of, 104-111 

 (Pigs. 1 1 7-1 20); spines and clasp- 

 ing organs, 107 (Figs. 113-116); 

 affinities, 111-115; dental plates, 

 III (Fig. Ill); history of fossil 

 forms, 112; dental evolution, 112; 

 structural affinities to shark, 112- 

 115; divergences from elasmo- 

 branchian structure, 113; skull and 

 mandible of, 113; fins and fin spines, 

 113; skin defences and teeth, 1 13; 

 gill arches, 114; brain of, 114; lat- 

 eral line, 114; clasping spine, 114; 

 descent of, 115; diphycercal tail 

 compared with that of sharks, 115; 

 separated from Arthrodirans, 136; 

 eggs and breeding habits, 181 (Fig. 

 191), 1 84, 185; list of authors and 

 works on the Chimseroids, 244; 

 gills, spiracle, gill rakers, and oper- 

 cula, tables, 271; genital system, 

 tables, 266; circulation in, tables, 

 269; central nervous system, 

 tables, 275; sense organs of, 

 tables, 277; integument and in- 

 tegumentary sense organs, 279; 

 early development of, tables, 280- 

 281. 



Chlamydoselache, antiquity of, 10; gill 

 shields, 20; lateral line, 49, 50 (Fig. 

 61); C. anguineus, 87 (Fig. 92); 

 affinities to shark, etc., 96; gill 

 arches, 1 14. 



Choiidrenchelys^ 78; anatomy of, 85. 



Chondrostei, in classification, 8, 

 161, 162. 



Chondros/ens, 161, 162; C. acipense- 

 roides, 161 (Fig. i6e^A). 



Chordates, ancestors of, 16 note; de- 

 scription of, 63-65. 



Christiceps, eggs of, 186. 



Circulatory characters in Dipnoans, 

 129. 



Cladodus, teeth of, 80 (Fig. 86 B). 



Cladoselache, in classification, 8; an- 

 tiquity of, 9; gill slits, 16; gill 

 shields, 20; dorsal fins of, 33 (Fig. 

 41) ; caudal fin of, 36, 37 (Fig. 46), 

 38; pectoral and ventral fins of, 42 

 (Figs. 49, 50), 43-46; a primitive 

 form of, 78; description of, 79; 

 anatomy of, 79 (Figs. 86 and 86^ 

 and 86^); dentition of, 86; affini- 

 ties of, 95, 98 (Fig. 103); gill 

 arches, 1 14. 



Clark, W., 130, 133 note. Frontispiece. 



Clasping spine of Chimseroids, 1 14; 

 absence of, in Dipnoans, 129. 



Claypole, E. W., 66, 67, 71, 80, 130. 



Climatiiis^ anatomy of, 82 (Fig. 89). 



Clupeoid, antiquity of, 9; heart, conus 

 and bulbus arteriosus, 258 (Fig. 

 320) ; heart, etc., comparison tables 

 of, 260. 



Coccosleus^ in classification, 8; locali- 

 ties, 130; anatomy of C. decipieiis, 

 131-133 (Figs- 130-132); dermal 

 and ventral plates of, 132 (Figs. 

 131, 132); lateral line in, 135; eyes 



of, 135- 



Cochliodonts, 86; dental evolution of, 

 112. 



Cod, barbels of, 46, 47 (Fig. 55), 

 1 7 1 ; description of Gadus morrJma, 

 174 (Fig- 182); circulation in, 

 tables of, 269. 



Coelacanthus, in classification, 8; dor- 

 sal fin of, 33. 34 (Fig. 43)> 43; de- 

 scription of, 87 (Fig. 92), 153; as 

 a Crossopterygian, 147; C. elegans, 



153 (Fig. 155)- 

 Columbia College Museum, 130, 135, 



Frontispiece. 

 Conus arteriosus, comparison tables of. 



