G. cnRYSEJirs. . 81 



Pseudemvs ornata, Cope, Joitm. Ac. PhUail. (l') \iii. p. 1;').3 (1870). 



Emys safvini, Giinth. I.e. p. 4, pis. ii., iii. 



Pseiidemys salviui, Cope, Bull. U. K Nat. Mus. no. 32, p. 22 (1887). 



Carapace moderately depressed ; shields with radiating ridges in 

 the young, longitudinally rugose in the adult ; nuchal narrow ; 

 first vertebral not or Imt sliglitly broader in front than beliind, 

 usually with sinuous lateral borders: second and third vertebrals 

 about as long as broad in the adult, narrower than the costals. Hind 

 lobe of plastron notched, its width at the utmost hardly one third 

 the width of the carapace ; its length about ei^uals the width of the 

 bridge ; the longest median suture is that between the abdominal 

 shields, the shortest that between the humerals ; axillary and 

 inguinal large. Head moderate ; snout short, feebly projecting ; 

 upper jaw not or but very slightly denticulated, with a small 

 median notch ; lower jaw coarsely denticulated in the adult ; alveo- 

 lar surface of upper jaw broad, narrower in the middle, with feeble 

 median ridge; the width of the mandible at the syuii)hysi8 is a 

 little less than the horizontal diameter of the oibit. Digits very 

 broadly webbed. Tail short. Carapace olive or brown, each costal 

 and marginal shield with a large ocellus formed by a round or 

 oval blackish spot, and one or more concentric yellowish rings ; 

 the centre of the ocellus situated in the postero-proximal part of 

 the costal shield ; vertebral shields with simious yellow longitu- 

 dinal lines, sometimes forming an imperfect ring ; all these markings 

 become indistinct in old specimens. Lower parts of shell yellowiish ; 

 plastron with a large symmetrical figure, formed of concentric dark 

 lines, extending from the gulars to the anal ; longitudinal dark 

 lines across the bridge ; lower surface of marginals with blackish 

 ocelli or concentric rings, the arrangement of which alternates with 

 that of the shields ; those markings likewise disappearing with age. 

 Head and limbs olive, with yellow or orange black-edged longitu- 

 dinal streaks, of which a supratemporal is the broadest ; the bands 

 on the chin mostly continuous with those on the throat, the median 

 branching oft' into two. 



Length of shell 35 centim. 



Central America. 



a-b. Yg., spir. Mazatlan. A, Collie, Esq. [P.J. 



(Types.) 



c,(l J , 9 , stffd. Mazatlan. Mr. A. Forrer [C], O. 



Salvin & F. 1). God- 

 mau, Esqs. [P.]. 



e-f. Yg., spir. Presidio. Mr. A. Forrer [C], O. 



Salvin & F. D. God- 

 man, Esqs. [P.]. 



ff. $,sttid. Presidio. Mr. A. Forrer [C], O. 



Salvin & F. D. God- 

 man, Esqs. [P.]. 



hfi. 5, stffd. Honduras. (Ty^es oi Umys ve7iusta.) 



k. 2 , stffd. Mexico. 



I. J, spir. Guatemala. O. Salvin, Esq. [C.]. 



(Type of Ji»ii/s salvhii.) 



