358 Dr. A. Giintlier on some Reptiles from Madagascar. 



Chamceleon 0^ Shaughnessn, sp. n. 

 (PL XIX.) 



This species is allied to Chamceleon Parsonn, from wliicli 

 and other similarly armed species it differs in the structure ot 

 the skin. 



Snout of the adult male produced into two flat compressed 

 high horns, slightly divergent in front, and covered with 

 large scutes ; the space between them is broad and deeply 

 concave and covered with rather large shields. Occipital 

 region flat, slanting from behind forwards, with a rounded 

 margin behind, and without lateral flaps. A dorsal crest is 

 indicated by a short row of small pointed tubercles, and ceases 

 entirely before the middle of the length of the trunk. No 

 median series of enlarged tubercles on the throat or abdomen. 

 Skin of the body and tail finely granular, with series of rather 

 large rounded tubercles ; similar more crowded and more 

 conspicuous tubercles on the throat. Heel without spur or 

 prominence. 



The coloration is now uniform brownish grey, the lower 

 jaw and throat nearly black, with the tubercles yellowish 

 white. 



I have seen only one specimen of this very distinct species, 

 from Betsileo ; it is an adult male. It is 15^ inches long, the 

 tail measuring 9 inches. 



This species is named in memory of my friend and fellow 

 labourer Arthur O'Shaughnessy, who had zealously devoted 

 himself to the study of Lizards, when his useful labours were 

 interrupted by a premature death (30th January, 1881). 



Chamceleon hrevicornis. 



Chamcdeon hrevicornis, Giiutlaer, Proc. Zool. Soc. 1879, p. 148, pi. xii. 

 tie:. A. 



Of this species I have now a series of five male specimens 

 before me, all from Betsileo. The short protuberance of the 

 snout, from which this species takes its name, grows with age : 



