14, NICORIA. 127 
with a broad yellow border. Head yellowish above, variegated with 
blackish; neck and sides of head with pale and dark bands or 
varicgations. 
Length of shell 20 centim. 
Western South America. 
a. Hgr., spir. Kismeraldas, Ecuador. Mr. Fraser [C.]. eos 
b,c. 2, shells. Hsmeraldas, Ecuador. Mr. Fraser [C. ]. (eyes) 
d. Q, stftd. Mendoza. 
é. 6, skel. is Zoological Society. 
6. Nicoria rubida. 
Chelopus rubidus, Cope, Proce. Am. Phil. Soc. xi, 1869, p. 148 (1870). 
Geoclemmys rubida, Gray, Suppl. Cat. Sh. Rept. p. 28 (1870). 
Rhinoclemmys mexicana, Gray, /. ec. p. 380, and Proc. Zool. Soc, 1870, 
p: 659, fig., and 1871, p. 296, pl. xxviii. 
Chelopus mexicanus, Bocourt, Journ. de Zool. v. p. 887 (1876); Sumi- 
chrast, Bull. Soc. Zool. France, 1880, p. 166. 
Emys rubida, Giinth. Biol. C.\--Am., Rept. p.8, pl. viii. fig. C (1885). 
Habit of a Vestudo. Shell moderately depressed, with a mere 
trace of a keel. V2rtebral shields constantly much broader than 
long, nearly as broad as the costals ; nuchal small,.sometimes absent. 
Plastron large ; the width of the bridge exceeds the length of the 
posterior lobe, which is angularly emarginate; front lobe truncate 
or openly emarginate anteriorly. Axillary and inguinal shields 
present, small; the suture between the pectoral and abdominal 
shield on each side forming a strong curve. Head moderately 
large, with short vertically truncate snout ; upper jaw feebly hooked, 
not notched; the width of the mandible at the symphysis equals 
the horizontal diameter of the orbit. No trace of web between the 
digits. Tail not longer than the head. Carapace olive or brownish, 
with a central ocellus and concentric yellowish lines on each shield, 
these markings becoming more indistinct in the adult; plastron 
with broad yellow border, dark brown in the middle and on a band 
across the bridge. Head and neck above pale brown, with large, 
rather variable, bands and rings of red (yellow in spirit), edged 
with blackish ; a large, horseshoe-shaped band on the crown ; limbs 
yellowish, with black and red markings. 
Length of shell 15 centim. 
Mexico. 
a. 2, stfid. San Juan del Rio. M. Rébouch [C.].) (Types of 
b,c. 9 & yg, San Juan del Rio. M. Rébouch [C. }. BR. mexi- 
shells. cand. ) 
Oh Gy if (OSS Tapana, Tehuantepec. I. Sumichrast [C. ]. 
spir. 
gy. $ shell. Tapana, Tehuantepec. IF, Sumichrast [C.]. 
