124 PROCEEDINGS OF THE ACADEMY OF 



Laemanctus alticoronatus Cope, Proc. A. N. S. Philada., 1865, 192. 



Two specimens. 

 Ctenosaura pectinata Wiegmann, Herpetologia Mexicana. Cyclura, Durn. 

 and Bibr. 



Numerous specimens of this large Iguana ; one taken with its mouth full 

 of the flowers of a papilionaceous tree called Sabi. The Iguanae are known to 

 be herbivorous, and CHinther has stated that the Basilisci are likewise. I can 

 add the Cyclura baeolopha, and many A n ol e s , not only the large, but 

 the small species. The latter take also ants, as described by G-osse and Wood. 

 The separated plates of the muzzle, with the small scales between them, place 

 the Metopocerus cornutus Wagl. of the West Indies between this genus and 

 the true Cycluras. The latter species was taken by Weiuland in Hayti (Mus. 

 Compar. Zoolog.) and by Fr. Klett in Navassa, southwest from Hayti. (Mus. 

 Academy.) 



Ctenosaura acanthura Wiegmann. Herp. Mexicana. 

 Apparently not so abundant as the last. 



Cachryx defensor, sp. et. gen. nov. 



Digits shortened. Body compressed. Nostril on canthus rostralis, lateral. 

 Femoral pores, no preanals. Tail short, flat, covered with verticils of strong, 

 erect, conic spinous seales. Head covered with small uniform scales ; no 

 interparietal. A strong gular dermal fold. No dorsal crest. 



This genus is allied to Urocentrum and Hoplurus, but differs in the pos- 

 session of femoral pores. It agrees in this with the depressed genus Hoplo- 

 cercus Fitzinger, but in it the caudal scales, though partially spiny, are not 

 whorled. Euphryne Bd. resembles it, but in it the scales of the whorls are 

 not prolonged into spines, and the animal is depressed. 



Head at posterior margin of orbits equal length from end of muzzle to 

 middle of frontal region. Scales on muzzle larger than others. Loreal region 

 concave ; nostril in hinder part of a single scale. Ear large as eye, without 

 marginal serrations. Scales of body small, slightly imbricate, homogeneous, 

 smooth, in transverse series, and oblique longitudinal ; larger on the rump, 

 smaller on the sides : a slightly larger vertebral series. Abdominals smooth, 

 equal dorsals ; gulars a little smaller, equal on plica. A prebrachial and 

 postauricular fold. Scales of fore limb moderate, some of those of femur and 

 tibia much larger, spiniferous. Caudal whorls fifteen, the scales below nar- 

 rowed, keeled, the carina prolonged into a flat spine. Spiniferous superior 

 whorls seven, spines nearly erect, those of the median row smaller. With 

 hind limb extended, the longest digit does not reach the axilla. Femoral 

 pores six to nine. Bright olivaceous ; shoulder and two bands on humerus, 

 and the anterior part of dorsum, with interscapular region, black, the latter 

 with two cross series of green spots, more or less distinct on the whole body 

 in younger specimens. In older specimens, median dorsal region bright 

 rufous. 



Total length, 8 in. 6 lines. Muzzle to gular fold, 1 in. 7 - 5 1. ; to vent, 5 in. 

 Fore limb, 2 in. 15 1. Exped. Coll., Nor585. 



This remarkable genus is decidedly iguaniform, but the digits are too short 

 for an arboreal habit. Its tail is like that of the most spinous Ctenosaura, 

 halved, and excessively abbreviated. 



Sceloporus serrifer, sp. nov. 



A stout species, near the S. spinosus, but differing in its fewer and 

 larger scales, with more serrate margins, and in its coloration. It belongs 

 therefore to the section with large lateral scales and only one row of large 

 supraorbitals. In this species the latter are bounded by a complete series of 

 inner and outer marginals. Scales from nape to rump, in twenty-three cross 

 series, each with a long mucro, and two and three lesser ones on each side of 

 it. Interparietal broader than long ; frontal narrow, only transversely divided, 



[May, 



