496 PROCEEDINGS OF THE ACADEMY OP 



orifice to the groin, beneath which are numerous white spots. Posterior ex- 

 tremities speckled with black ; a pale line on the posterior face. 

 Habitat. Surinam. Mus. Academy Nat. Sciences ; Dr. C. Hering, donor. 



C. intermedius, Schlegel. 



Intermaxillary teeth nine, a single external upon each side sometimes smaller. 

 Posterior cephalic plates narrower than the breadth of the head. Dorsal 

 scales small, in twenty-five to thirty-eight rows. Scales of the gular fold 

 acute, produced, forming a serrate border. Abdominal scales in fourteen 

 longitudinal rows ; the preanal strongly keeled. Femoral pores fifteen. 



Above brownish olivaceous, beneath paler. A light band extends from be- 

 neath the eye to the crural region : this is broadly bordered superiorly with 

 brown, which becomes posteriorly broken into transverse bars. These are finally 

 almost in contact dorsally, and are continued upon the median line of the tail. 

 Upon the nape are indications of three median light streaks. From the axil- 

 lary region extends a broad brown band, which is finally broken up. Upon 

 the base of the tail and for a short distance anterior to the groin, a second 

 pale line may be observed. Sides, belly and inferior surface of the extremi- 

 ties immaculate. Size similar to that of the preceding species, the length 

 from muzzle to vent being 3 inches 6 lines. 



Habitat. Barbadoes. Mus. Acad. Nat. Sciences. 



I cannot arrive at any greater certainty than did Wiegmann as to whether 

 the present species his C. vittatus is identical with that called by Gray (from 

 Schlegel) C. intermedius. He says, (Herpet. Mexic, 26,) " . . didici, 

 eandem speciem (si quid ex brevissimis Angli diagnosibus percipere licet) a eel. 

 Schlegel C. intermediam appelari, quo nomine nullum potest excogitare 

 melius." I have followed Wiegmann in regarding them as identical. 



C. s t r ia tu s, Gray. 



Intermaxillary teeth nine, the median five smaller than the external two 

 upon each side. Posterior cephalic plates narrower than the temporal diameter 

 of the head. Dorsal scales large, in "from seventeen to twenty-five rows."(l) 

 Scales of the gular fold acuminate, forming a serrate margin. Abdominal 

 scales " in twelve rows," (Gray.) Praeanal scales? Femoral pores as in C. 

 calcaratus? 



Green olivaceous above, with two yellowish lines upon each side, which em- 

 brace a brown or black band : the superior sometimes bordered with black; 

 the sides sometimes spotted. Beneath unicolor. 



Habitat. Guiana. 



Aristelliger, Cope. 



Digits slender at the base, free, dilated at the extremity and furnished with 

 a single row of transverse plates beneath. Ultimate joint of all free, elongate, 

 compressed, furnished with a claw, that of the thumb ensheathed. Tail elon- 

 gate, cylindrical, the squamation minute, verticillate. Femoral and prseanal 

 pore's none. Pupil elliptic ; superior eyelid furnished with a hornlike process. 

 Sides simple. 



This genus is related to Theconyx, Gray and Pentadactylus, Gray, butboth 

 of these possess preeanal or femoral pores; also in the former the last digital 

 joint is scarcely free. The form is in fact hemidactyl, as Dr. Hallowell has 

 indicated. The hornlike process above the eye, appears to be peculiar to it 

 and to certain species of Spha3rodactylus. 



A. praesignis. 



Hemidactylus prcesignis, Hallow., Proc. A. N. Sci. Phila., 1856, p. 222. 



Dr. Hallowell's statement* that the thumbs of this species are destitute of 

 claws is erroneous ; they are sheathed beneath a dorsal hood. The specimens 

 from which the description was taken were either in a peculiar stage of meta- 

 chrosis, or had been stained by impure spirits. The following is a true ac- 



[Dec. 



