288 INDEX 
tables, 267 (Figs. 332-337); ab-| Chondrosteus, 161, 162; C. — - 
dominal pores, tables, 271; brain] roides, 161 (Fig. 165 A). Be > 
of, 273 (Fig. 342). ° Chordates, ancestors of, 16 note; d 
CHIMROIDS, in classification, 7, 8; | scription of, 63-65. teat ‘ > 
antiquity of, 9, 10; gill shields, 20; | Chrésticeps, eggs of, 186. — 
affinities to shark, 96; general de- | Circulatory characters in Dipnoans, 
scription of, 99-115 (Figs. 104-| 129. 
120); anatomy of, 99-101 (Fig. | Cladodus, teeth of, 80 (Fig. 86 B). 
104); skeleton of, 101-103 (Fig. | Cladoselache, in classification, 8; an- 
105); embryology and larval his-| tiquity of, 9; gill slits, 16; ae ~ 
tory of, 103; fossil Chimzroids,} shields, 20; dorsal fins of, 33 (Fig. __ 
103, 104 (Fig. 105 4); living Chi-} 41); caudal fin of, 36, 37 (Fig. 46), 
meroids, description of, 104-111} 38; pectoral and ventral fins of, 42 
(Figs. 117-120); spines and clasp-| (Figs. 49, 50), 43-46; a primitive 
ing organs, 107 (Figs. 113-116); | form of, 78; description of, 79; 
affinities, 111-115; dental plates,| anatomy of, 79 (Figs. 86 and 864 
111 (Fig. 111); history of fossil| and 86 8); dentition of, 86; affini- _ 
forms, 112; dental evolution, 112;| ties of, 95, 98 (Fig. 103); gilts 
structural affinities to shark, 112-| arches, 114. ¢. an 
115; divergences from  elasmo- | Clark, W., 1 30, 133 note, Frontispiece. 
branchian structure, 113; skull and | Clasping spine of Chimeroids, 114; 
mandible of, 113; fins and fin spines, | absence of, in Dipnoans, 129. 
113; skin defences and teeth, 1135 | Claypole, E. W., 66, 67, 71, 80, 130. — 
gill arches, 114; brain of, 114; lat- | C/imatius, anatomy of, 82 (Fig. 89): 
eral line, 114; clasping spine, 114; | Clupeoid, antiquity of,9; heart,conus 
descent of, 115; diphycercal tail} and bulbus arteriosus, 258 (Fig. = 4 
compared with that of sharks, 115; | 320); heart, etc., con tables 
separated from Arthrodirans, 136;| of, 260. - ae 
eggs and breeding habits, 181 (Fig. | Coccosteus, in classification, 8; locale a 
191), 184, 185; list of authors and} _ ties, 130; anatomy of C. decipiens, 
works on the Chimeroids, 244;| 131-133 (Figs. 130-132); dermal 
gills, spiracle, gill rakers, and oper-| and ventral plates of, 132 (Figs. 
cula, tables, 271; genital system,| 131,132); lateral line in, 135; eyes — 
tables, 266; circulation in, tables,| of, 135. 
269; central nervous system, | Cochliodonts, 86; dental evolution of 
tables, 275; sense organs of,| I12. 
tables, 277; integument and in-| Cod, barbels of, 46, 47 (Fig. 55)» 
tegumentary sense organs, 279; 171; description of eu morrhua, — 
early development of, tables, 280-| 174 (Fig. 182); circulation in 
281. tables of, 269. y 
Chlamydoselache, antiquity of, 10; gill | Ce/acanthus, in classification, 8; dor: 5 
shields, 20; lateral line, 49, 50 (Fig. | sal fin of, 33, 34 (Fig. 43), 433 de- 
61); C. anguineus, 87 (Fig. 92);| scription of, 87 (Fig. 92), 153; as — 
affinities to shark, etc., 96; gill] a Crossopterygian, 147; C. elegans, : 
arches, 114. 153 (Fig. 155). : 
Chondrenchelys, 78; anatomy of, 85. | Columbia College Museum, 130, 1357 = 
CHONDROSTEI, in classification, 8, Frontispiece. e 
161, 162. Conte arteriosus, comparison tables of, 
