302 



HELODERMATID^, 



raillim. 



Total length 597 



Head 



Width of head 



Body 



Western Mexico, 



a. Adult. 



b. Ad., stuffed. 



c. Yg. 



d. Ad. 



e. Ad., stuffed. 

 /, g. Ad., stuffed. 



57 



46 



270 



millim. 



Fore limb 103 



Hind limb 114 



Tail 270 



Presidio. 



Presidio. 



Tapana, Teliuantepec. 



Mexico. 



Mexico. 



Mexico. 



Herr A. Forrer [0.]. 

 Herr A. Forrer [C.]. 

 F. Sumichrast, Esq. [C.]. 

 J. Marshall, Esq. [P.]. 

 Sir J. Richardson [F-]- 



2, Heloderma suspectum. 



Ilelodernia horridura (mm Wiegm.), Baird, U.S. Mex. Bound. Surv. 



ii. liept. pi. xxvi. ; Cope, Proc. Ac. Philad. 1866, p. 303. 

 suspectum, Cope, Proc. Ac. Philad. 1869, p. 5. 



Closely allied to the preceding. The digits and the tail are 

 shorter, and the tubercles on the back are separated by wider gra- 

 nular interspaces. Yellowish or orange, with blackish network on 

 the back and cross bands on the tail. 



Ad. 



Arizona. 



Smithsonian Institution [P.]. 



Whether the following genus is to be placed here, or constitutes a 

 distinct allied family (Lanihanotido', Steindachner), must remain 

 doubtful until its anatomical characters are known. Its dentition 

 was originally stated to be the same as in Heloderma, but this has 

 been subsequently corrected by Steindachner. 



LANTHANOTUS. 



Lanthanotus, Sieindachner, Denhschr. Ah. Wieii, xxxviii. 1878, 

 p. 95, and Sitzh. Ak. Wien, Ixxviii. i. 1879, p. 399. 



Ear concealed. No gular fold. Digits granular inferiorly. 

 Upper surface of body and tail tubercular, with I'ows of large wart- 

 like tubercles, each of which bears a horny keeled scale ; abdominal 

 scales flat, feebly imbricate. No labial shields. 



Borneo. 



1. Lanthanotus borneensis. 



Lanthanotus borneensis, Steind. I. c. pi. ii. 

 Head depressed, oval, with broad round snout; eyes very small; 



