465 Bulletin 39 293 



Cavolina inflexa 42 



trispinosa 42 



uncinata 42 



Cercado formation 193 



Cerithidea costata ......126 



hegewishi 1 27 



scalariformis 126 



turrita 126 



varicosa 126 



Cerithiopsis burkvillensis... 123 



crystallina 123 



emersoni 124 



estellensis 2 15 



greenei 123 



martensi 123 



subulata , 124 



vanhyningi 123 



Cerithium algicola 125 



costaricense /j .....315 



dislocatum 59 



eburneum 125 



floridanum 124 



galvestonense ....126 



greenei 123 



litteratum ......125 



minimum 125 



var. nigrescens 125 



muscarum 125 



protextum , 59 



punctatum ...i 24 



terebralis 1 24 



variabile. 125 



Chaetopleura apiculata i68 



Chama antiquata 390 



arcinella 391 



congregata j/..... 203,390 



congregatoides 390 



Cheilea equestris 143 



prinectonia 186 



Chemnitzia 108 



Chesapeake Miocene 202 



Chione chiriquiensis jj 420 



costaricensis 417 



grus 2g 189, 205, 420 



holocyma jj 419 



hotelensis J5 ••419 



mactropsis jj 188,417 



rowleei jj 188, 416 



tegulum 187 



ulocyma 200, 201, 417 



Chiton 168 



marmoratus 169 



tuberculatus 169 



Chicoreus 95 



Chlorostoma costaricensis -/^£?...335 



C horistella pompholyx 161 



Circulus liratus 160 



trilix 160 



Clathurella jewetti 70 



Clava alajnela /j 317 



chipolana ...126 



costaricana /j 316 



dementia dariena 34 187,404 



Cleodora lanceolata 42 



Clio recurva 43 



pyramidata 42 



Cochliolepis parasitica 159 



striata 159 



Columbella ambigua ..298 



mercatoria 93 



rusticoides 93 



submercatoris /j 297 



Columbraria testacea 115 



Compressidens 39 



Conomitra 82 



Conns iemulator 186 



agassizi 200, 226 



amphiurgus 62 



berghausi 215 



var. boscensis 6 223 



burckharti 6 200, 224 



catenatus 215 



centurio 61 



