44 LACERTILIA. 
body with three cross bands; single yellow scales are scattered over the black interspaces. 
Legs with a yellow ring round the root, and tail with five yellow rings. 
2. Heloderma suspectum. 
Heloderma horridum, Baird, U.S. & Mex. Bound. Exped., Rept. p. 11, t. 26. 
Heloderma suspectum, Cope, Proc. Ac. N. Sc. Phil. 1869, p. 5. 
Hab. Nortu America, Arizona, Texas.— Mexico, Sonora. 
On its poisonous qualities see Shufeldt, Am. Nat. xvi. p. 907; Boulenger, Proc. 
Zool. Soc. 1882, p. 631. 
Fam. IGUANIDA. 
ANOLIS. 
Anolis, Daudin, Hist. Rept. iv. p. 50. 
The species of Anolis have been quite recently subjected to a thoroughly critical 
examination by Boulenger, who is about to publish a complete account of them in his 
forthcoming second volume of the ‘ Catalogue of Lizards.’ In that account the specific 
characters of the 112 species admitted or distinguished by the author are worked out 
with such precision that it will remain the basis for the future study of this group for 
many years to come; and there is no need for repeating here his detailed diagnoses of 
the species which I have included in the following list as occurring in Central America. 
With the aid of Boulenger’s work it is now also possible to give a more definite idea 
of the distribution of this genus which is so characteristic of the fauna of the northern 
portion of Tropical America. The majority of the species are evidently confined to 
more or less narrow limits, only a few having a wider distribution, and none extending 
over the entire range of the genus. The greatest amount of variety is met with in the 
West Indies; for although the number of island species is slightly exceeded by those 
occurring in Central America, several are sufficiently differentiated to be referred 
to distinct genera, whilst all the Central-American species belong to the genus Anolis 
proper. 
The numerical representation of these Lizards in the various districts of the region is 
as follows :— 
Species peculiar to the West Indies. . . . - oe ew ee. 84 
»» common to the West Indies and North America re | 
»» common to the West Indies and Central America . . .. 1 
» common to the West Indies and South America. . . .. I 
» peculiar to Central America . . re 
» found south of the Isthmus of Darien only we ee ww 4 
» found north as well as south of the Isthmus of Darien . . . 5 
»  Ofuncertain locality . . . 2. 1. 1. 6 ee ee ewe 8? 
