REPTILES. 
287 
length as the body. Four feet long. Inhabits North Ameri¬ 
ca. 
Genus 5.—C HE L O NI A.— Brongniart. 
Feet produced, in the shape of scaly fins; toes elongated, 
and unequal, covered with scales, and united by a membrane, 
their exterior edges provided with small nails, and terminated by 
laminated scales. 
Chelonia mydas .— The Green Turtle. 
Plate LXIX. fig. 2. 
Shell pale brown, with variegated undulations, heart-shaped, 
pointed at the extremity, with 13 dorsal scutellae, and 25 mar¬ 
ginal plates. Six feet long. Inhabits the West Indian Seas. 
Genus 6. — C HE L Y S. — JDumeril. 
Generic Character —Lips fleshy, mouth cleft across, with a 
produced snout; toes webbed ; hind feet with a protuberance 
occupying the place of webs, but destitute of a claw; limbs of 
the animal not contained within the shell. 
Chelysfimbriata. — The Fringed Tortoise. 
Shell oval, moderately convex, pale umber-brown, rugose, 
with pyramidal protuberances ; neck provided with fimbriated 
membranous appendages; snout cylindrical, and sub-truncated ; 
disc consisting of 13 semicircular scutellae, and having 25 nearly 
square marginal pieces. Three feet three inches long. Inhabits 
Guiana. 
Genus 7— TRICONYX_ Geoffroy. 
Generic Character .—Back plate destitute of scales, but cover¬ 
ed with a coriaceous skin, studded near each extremity with 
hard knobs; lips fleshy; nostrils prolonged into a cylindrical 
tube ; three only of the five toes furnished with nails. 
Triconyx ferox .— The American Soft Tortoise. 
Shell ovate, dusky-brown, bony in the centre and cartilagi¬ 
nous on the margins, with five or six obscure transverse bands, 
and covered with small granulations, longest near the margin ; 
head small, trigonal; snout much elongated ; nostrils prominent 
and tubular. Eighteen inches long. Inhabits North America. 
