TAB. IV. 



Chelone longiceps, nat. size. 



Fig. 



1 . Skull and portion of carapace. 



s2- Second neural plate. 

 ■S3. Third neural plate. 



2. Portion of carapace. 



SA — s\\. Fourth to eleventh neural plates. 



pk — ph. Impressions or remains of costal plates. 



VA — Vr,. Impressions of fourth and fifth vertebral scutes. 



