162 =-Mr.J. E. Gray on a new genus of Night Lizards. 
x, oval body with which vas deferens communicates ; y, sac of un- 
known function; x, dichotomously divided tube which opens into 
the sac y; @, tube connecting the sac y with the oval body 2; 
vy, the testis ?; 3, pyriform sac connected with y; €€€, the ovary ?; 
6 4, capsular bodies connected with ovary. 
Pruate VII. 
Fig. 1. System of cesophageal ganglia : aa, great supra-cesophageal ganglia ; 
bb, second pair; cc, third pair; d, azygous ganglion ; e e, com- 
missures connecting supra-cesophageal ganglia with azygous gan- 
glion; f, commissure which runs beneath the cesophagus and 
unites the two ganglia of the second pair ; gg, organs of hearing. 
Fig. 2. Organ of vision: a, pigmental body ; 6, optic nerve; ¢, crystalline 
lens ; d, transparent capsule inclosing pigmental body and lens. 
Fig. 3. Subcutaneous mucous glands. 
Fig. 4. Terminal culs-de-sac of the hepatic system. 
Fig. 5. The tongue: a, lingual sac; b, unarmed prolongation, in which the 
tongue terminates at the right side. 
Fig. 6. Portion of posterior salivary glands. 
6 
Fig. 7. One of the oval bodies contained in the ovarian capsules. 
8. Portion of the ovary with its capsule: aa a, sacciform appendages; 
b, capsule ; c, oval bodies inclosed by the capsule. 
Fig. 9. Group of ova as deposited upon the leaves of Zostera marina, &c. 
Fig. 10, 11, 12. Embryo: aa, locomotive dises; 6, foot; ¢, operculum ; 
d, organs of vision ; ¢, esophagus; f, stomach; g, granular mass, 
beneath which the posterior part of the alimentary canal is con- 
cealed ; A, rudiments of cesophageal ganglia; 27, filaments which 
pass backwards from the base of the dises. 
XV.—Description of a new genus of Night Lizards from Belize. 
By J. E. Gray, Esq., F.R.S. &e. 
To the Editors of the Annals of Natural History. 
GenTLEMEN,—This interesting new form of Gecones, or Night 
Lizards, was sent from Belize by Mr. Dyson under the name of 
«* Gallwaspe,” a name which appears to be generically applied to 
most Lizards by the English in Tropical America. It is at once di- 
stinguished from all the genera of the family before known by the 
short, blunt, compressed, equal-diametered toes, but more particularly 
by the very small size of the claws, which are completely hidden be- 
tween two large, half oblong scales, which have a narrow one between 
the base of the upper edge. 
Genus Cotronyx. Fam. GecorTip#. 
Toes rather compressed, equally thick their whole length, blunt 
at the end; edges simple, rounded; upper surface covered with a single, 
and the sides with three series of six-sided scales, the under surface 
witha single series of rather narrow, slightly convex, transverse scales ; 
the end of each toe furnished with large, oblong, convex scales on 
each side, forming a complete sheath to the small claws, and with 
