236 DR. R. W. SH13F£LDT ON [Apr. 1, 



with a fair idea of tlie reptile. A drawing is also given of 

 the superior aspect of the head.) 



(7) 1836. DuMERiL (A. M. C.) and Bibron (G). — Erpetologie 



Generale ou Histoire Naturelle complete des Reptiles. T. 

 iii. pp. 499-501. — (In this justly celebrated work a brief 

 description of the Heloderma is given, which adds nothing to 

 previous descriptions of other authors.) 



(8) 1837. Gray (J. E.).- — Proceedings of the Zoological Society of 



London. P. 132. — (Places the Hehdennatidce with the 

 Leptofflossce, a subdivision of the Saurians as proposed by 

 Wiegmann.) 



(9) 1S38. Bonaparte (Charles Lucien).^ — ^" Synopsis Vertebrat- 



oruin Systematis. " Nuovi Annali delle Scienze Naturali. 

 Annoi.Tomo ii. Bologna, pp. 105-133. — (On page 124, family 

 13 is represented by the Helodermatidce, and subfamily 20 

 by the Helodermatina, the latter being the only subfamily 

 ranged under the former. The cacography in either case is 

 retained. The year, although given as above both on back 

 of volume and the titlepage, should probably be 1839, 

 unless Touio iii. was published in 1839. Compare same 

 work below.) 



(10) 1840. Idem. — " Prodromus Systematis Herpetologise." Nuovi 



Annali delle Scienze Naturali. Anno ii. Tomo iv. Bologna, 

 pp. 90-101. — (Here the Heloderms are placed with the 

 Leptoglossi of this author, between the Varanidce and the 

 Ameividce (Tribus 2) ; and upon p. O.') the following cha- 

 racterization of them is given : "Familia 13. Helodermatidce. 

 Lingua. . . . laminae supraorbitales cutaneac : oculi palpe- 

 brati ; aures conspicuae : membraua tympani superficialis ; 

 caput tuberculato-squamosum, depressum : corpus eloiig- 

 atum. 



" Subfamiha 21. Helodermatina. Dentes adnati : cutis 

 sulculis exarata : squamse tuberculiformes osseas : pori fe- 

 morales nulli." 



(11) 1840. Idem. — " Systema Vertebra torum." Trans. Linn. Soc. 



London; vol. 18. pp. 247-305. Separate, 1. p. 1. 58pp. 

 Helodermatidae and Helodermatina, p. 294 ; Sep. 37. — 

 (Li the last place there occurs the same characterization of 

 the Helodermatidce and the Helodermatina as is quoted above 

 from the Prodromus, with the exception that the words 

 " Familia" and " Subfamiha" were not introduced, and owing 

 to a certain re-arrangement the subfamily is 20 instead of 21 

 as above given.) 



(12) 1845. Gray (J. E.). — Catalogue of the Specimens of Lizards 



in the Collection of the British Museum. P. \A.— {Helo- 

 derma horridum is here alluded to under the name of "The 

 Caltetepon," and isolated as the representative of the family 

 " Caltetepons " {Helodermidce).) 



(13) 1853. Troschel (F. H.). — Archiv fiir Naturgeschichte ; t. i. 



p. 294. — (Taf. xiii. and xiv. present us with very good figures. 



