• 14Q 



1869.] ^^^ [Cope. 



Below, deep brown, the plastron broadly yellow all round. In the young 

 the yellow extends over the whole plastron ; in the very old the brown is 

 very narrow medially. 



Measurejnents, (No. 265.) 



Greatest length plastron Cm. .1525 



Width medially (Total) " .1123 



Greatest length carapace " .16 



Greatest elevation carapace " .064 



Hind limb from knee " .0538 



Fore " elbow " .041 



Head and neck above " .07 



Width head (Temporal) " .024 



From orbit to end muzzle " .0082 



Habitat. Tuchitan Tehuantepec, Mexico, discovered by Prof. Francis 

 Suniichrast. Four specimens, Nos. 264-5-6-7. 



This handsome land tortoise appears to approach sufficiently near the 

 C. callicephalus, Gray (Proc. Zool. Soc, London, 1863, 254), of unknown 

 habitat, to render a comparison proper. That species according to Gray, 

 has a posteriorly truncate plastron, and a notched beak. The vertebral 

 scuta are as long as broad, the second and third longer. The chin, throat, 

 and upper parts of the neck are spotless. We owe this species to our 

 active correspondent, F. Suniichrast, who since the days of Natterer, 

 has not been equalled in the thoroughness and extent of his zoological 

 researches in Tropical America. 



CONIOPHANES PICEIVITTIS, Cope. 



Scales in twenty-five longitudinal series, vertex and muzzle in one 

 plane ; upper part of rostral plate prominent, not produced between the 

 internasals. Latter less than half prefrontals. Prefrontals longer than 

 wide, decurved to the subquadrate loreal. Postnasal higher than pre- 

 nasal. Preoculars one or two, postoculars two, superior larger. Super- 

 ciliaries narrow. Frontal rather wide, with long posterior angle, and 

 parallel lateral outlines which are little shorter than the anterior. Occipi- 

 tals elongate, scarcely emarginate behind. Superior labials eight, fourth 

 and fifth entering orbit. Sixth higher than long ; seventh largest. Tem- 

 porals 1-2. Postgeneials shorter than pregeneials. Inferior labials ten. 

 Gastrosteges 158 two anals ; urosteges, 90. Total length, .542 m. ; of tail, 

 .063 m.; from muzzle to canthus oris, .014 m.; interorbital width, .0048 m. 



The ground color above and below is white, which is immaculate 

 below, except on the throat and chin, where it is black dusted. Above 

 three broad black bands extend from the end of the muzzle to the end of 

 the tail. The inferior commences on the middle of the third row, and 

 occupies three and two half rows of scales ; a row and one-half intervenes 

 between this and a median dorsal band which covers six and one or two 

 half rows. The ground color on the head is an irregular line from the 

 muzzle along each canthus and beyond orbit, and the upper labial plates ; 

 these are thickly dusted with black, the anterior spotted on the edge. 



