CONTENTS. 



Order— CHELONIA. 



Family — Marina. 



Genus — Chelone 











FIGB 



1 



Species — breviceps 











10 



— lohgiceps 











16 



— latiscutata 











20 



— convexa 











21 



— suhcristata 











24 



— planimentutn 











25 



— crassicostata . 











27 



— declivis 











30 



— trigoniceps 











31 



— cuneiceps 











33 



— subcarinata . 











37 



Supplemental remarks on the species from Harwich 







40 



Summary on the genus Chelone 











44 



Family — Fluvialia . 



Genus — Trionyx 













45 



Species — Henrici 













46 



— Barbara 













50 



— incrassatus 













51 



— marginatus 













55 



— rivosus 













56 



— planus 













58 



— circumsulcatus 













59 



— pustulatus 













60 



