ART. 6 HAITIAN HERPETOLOGICAL. COLLECTION COCHRAN 5 



tion of the supraorbital semicircles are small in the figure, but rela- 

 tively larger in the paratype. In comparing our specimen from Con- 

 stanza (No. 62103) with the paratype, I find the following discrepan- 

 cies : The temporal region in the paratype is covered with very fine 

 granules; in No. 62103 these granules are much coarser, although 

 this is the smaller specimen (the paratype measures 42 mm., and 

 No. 62103, 39 mm.). The supraorbital semicircles are separated 

 rather widely in the paratype, but in contact anteriorly in No. 62103. 

 The supraoculars in No. 62103 have low keels, and the scales lying 

 in front of them are very small, in these respects agreeing with the 

 figure of the type but disagreeing with the paratype. The outline 

 of the snout when viewed from above is nearly the same in the 

 figured type and in No. 62103. The snout of the paratype, however, 

 seems much longer in proportion to the width of the head, and this 

 observation holds also in comparing the profiles of No. 62103 and the 

 paratype. In nearly all aspects No. 62103 scenes to resemble the 

 figure of the type far more closely than it resembles the paratype. 

 If the paratype be a true olssoni, then the species is certainly ex- 

 tremely variable. I am convinced, however, that the paratype is not 

 a true Anolis olssoni, a conviction which is also shared by Doctor 

 Ruthven, who has examined the specimens now under discussion. 



CYCLURA RICORDII (Dumeril and Bibron) 



In 1789 Abbe Bonnaterre described an iguana with a remarkable 

 frontal horn, calling it Lacerta cornuta.^ The specimen upon which 

 the description was based was taken in 1784 " dans les monies de 

 I'hopital, entre I'Artibonite et les Gonaives," Santo Domingo (now 

 the Republic of Haiti). This same specimen was described in more 

 detail by Dumeril and Bibron* under the name of Metopoceros 

 cornutus, and since their time the species has come to be fairly well 

 known to science. Doctor Abbott has sent to the National Museum 

 a good series of these lizards, which will be discussed in detail a 

 little later in this paper. 



Another large iguanid lizard collected in Santo Domingo by M. 

 Alexandre Ricord and sent by him to the Museum of Natural History 

 in Paris was described by Dumeril and Bibron in the same work^ 

 as the monotype of a new genus, Aloponotus ricordii. This species 

 also was based upon a single skin, which until 1919 remained 

 unique. In that year Doctor Abbott sent home a skin of a rock 

 iguana which agrees in most respects with Dumeril and Bibron's 

 description of Aloponotus ricordii. Doctor Stejneger exhibited this 

 skin at a meeting of the Society of Ichthyologists and Herpetologists 



s Tabl. Enc. M4tli. Erp., p. 40, pi. 4„ fig. 4. " Idem, p. 190. 



*Erp. G6n., vol. 4, 1837, p. 211. 



