REPTILIA. 



75 



No. 286. Chelonemys ovata. 



Carapace, ventral surface. From the Litho- 

 graphic quarries (Upj)er Oolite) at Cirin, France, 

 and now in the Museum of Natural History of 

 Lyons. Size, 10 x 8. Price, $3.00. 



No. 287. Chelonemys plana. 



Carapace, ventral surface. From the same locality and Museum as preced- 

 ing. Size, 9x7. Price., $2.75. 



No. 288. Achelonia formosa, Meyer. 



Left Hind-Foot. This relic of an emydian Turtle was obtained from the 

 Lithographic slate (Upper Oolite) at Eichstadt, Bavaria, and belongs to the Ty- 

 lerian. Museum at Haarlem, Holland. Price, $0.60. 



No. 289. Hydropelta Meyeri, D'Orbigny. 



Carapace, on slab, ventral surface. This fresh-water Turtle lived in" the 

 Upper Oolite period, this fossil having been found in the Lithographic slates at 

 Cirin, France. .The specimen is in the Museum of the Garden of Plants. 



Size, 11x8. Price, |g.00. 



No. 290. Chelichnites, (Actibatis Triassae, Jardine]. 



Track, on slab. These tracks on the Permian sandstone are supposed to 

 be the footprints of Chelonians. They are among the earliest indications of the 

 existence of Reptiles on our planet. These ichnites were discovered in the Trias 

 sandstone at Corncockle Muir, Scotland, and are in the Collection of Sir William 

 Jardine of Annandale. Size, 4 ft. x 1 ft. Price, $5.00. 



Order 3 — Ophidia. 



These, the most numerous of living Reptiles, have vertebras and 

 ribs similar to those of the Lizards, only the ribs are hollow and begin 

 at the third vertebra from the head. They have double nostrils and 

 loosely united cranial bones. Sternum, sacrum, scapular arch and vis- 

 ible limbs are wanting. But a pair of slender bones, often supporting 

 a second bone armed with a claw, are sometimes found suspended in 

 the flesh near the vent ; and a minute sternum, clavicle, and scapula 

 may also be detected beneath the skin. The vertebrae articulate by 

 eight joints in addition to that of the cup and ball on the centrum, 

 and so interlock that even in the dead state the body cannot be 



