288 



INDEX 



tables, 267 (Figs. 332-33?) 5 ab ' 

 dominal pores, tables, 271; brain 

 of, 273 (Fig. 342). 



CHIM^ROIDS, in classification, 7, 8; 

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

 affinities to shark, 96; general de- 

 scription 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. 105^); living Chi- 

 mseroids, description of, 104-111 

 (Figs. 117-120); spines and clasp- 

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

 affinities, 111-115; dental plates, 

 in (Fig. in); history of fossil 

 forms, 112; dental evolution, 112; 

 structural affinities to shark, 112- 

 115; divergences from elasmo- 

 branchian structure, 113; skull and 

 mandible of, 1 13; fins and fin spines, 

 113; skin defences and teeth, 113; 

 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), 184, 185; list of authors and 

 works on the Chimaeroids, 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. 



Cklamydoselache, antiquity of, 10; gill 

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

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

 affinities to shark, etc., 96; gill 

 arches, 114. 



Chondrenchdys, 78; anatomy of, 85. 



CHONDROSTEI, in classification, 8, 

 161, 162. 



Chondrosteus, 161, 162; C. acipense- 

 roides, 161 (Fig. 165^). 



Chordates, ancestors of, 16 note; de- 

 scription of, 63-65. 



Christiceps, eggs of, 1 86. 



Circulatory characters in Dipnoans, 

 129. 



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



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 86,4 

 and 86.5); dentition of, 86; affini- 

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

 arches, 114. 



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



Clasping spine of Chimaeroids, 114; 

 absence of, in Dipnoans, 129. 



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



Climatius, anatomy of, 82 (Fig. 89). 



Clupeoid, antiquity of, 9; heart, conus 

 and bulbus arteriosus, 258 (Fig. 

 320) ; heart, etc., comparison tables 

 of, 260. 



Coccosteus, in classification, 8; locali- 

 ties, 130; anatomy of C. detipiens, 

 I 3 I ~I33 (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 ), 

 171; description of Gadus morrhua* 

 174 (Fig. 182); circulation in r 

 tables of, 269. 



C&lacanthus, 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,. 



