Cope.] ^* " ' [June 20, 



small and equal to the ostia pharyngea. The vomerine series are well 

 separated from each other and extend but little external to the inner border 

 of the nares. Vertical diameter of tympanic disc a little less than the hori- 

 zontal. Second and fourth fingers equal ; the first a little longer. The pos- 

 terior foot is slender, and the solar portion is as long as the tibia and half 

 of the astragalus. Solar tubercles insignificant. 



Dark ashen gray above, sides blackish above, speckled with white and 

 blackish below. An interorbital dark spot ; upper lip marbled ; posterior 

 face of femora dark, with light specks. Below white, the sides gray 

 marbled. Throat gray, white spotted. Posterior limbs obscurely cross- 

 banded above. 



Length of head and body, .038 ; of head axially to angle of jaws, .OH ; 

 width at latter point, .0135 ; length of hind limb, .055 ; of hind foot. .028. 



Taken from a well near Japana. 10041. (No. 16, F. S.) 



20. Cystignuthus gracilis D. B. 10018-9. (No. 6-7.) Found under old 

 logs and stones, near water. 



21. Cystignathus labialis Cope, Proceeds. Araer. Philos. Soc. 1877, p. 90. 

 The original description of this species was taken from young specimens 



in which the posterior limbs are not as long as in adults. Numerous speci- 

 mens from Tehuantepec, which fix the characters and locality. There are 

 also three specimens sent by M. Sumichrast, from Potrero, near Cordova, 

 Vera Cruz. 



22. Ranula affinis Pet. (No. 5, F. S.) Rather common in pools and 

 rivulets. It grows to a large size, when the dorsal markings become obso- 

 lete. 



Rana halccina Kahm, var. with indistinct dorsal spots. 



Some varieties of this species from its extreme southern range, look quite 

 different from the typical form. The dorsal green becomes more vivid, and 

 has sometimes a blue shade on the head. The spots become obscure, and 

 there is a general resemblance to the Banula affinis. It may be distinguished 

 from that frog by the less palmation of the toes, which are without apical 

 callosities, and by the presence of dermal folds between the dorso-laterals, 

 although these are sometimes faint. The most aberrant examples come 

 from Coban, Vera Paz. 



Lacertilia. 



24. Epaphelus sumichrasti Cope. 



25. Mocoa assata Cope. 



26. Celestus chalybwus Cope. 



27. C ' nemidophorus microlepidopus Cope, Proceed. Amer. Philos. Soc. 

 1877, p. 93. 



28. Cnemidophorus unirolor Cope, 1. c. 93. 



29. Cnemidophorus immutabilis Cope, 1. c. 93. 



30. Cnemidophorus lathittis Cope, 1. c. p 94. 



31. Arnica undulata Wiegmann. 



32. Lepidophyma smithii Bocourt. 



