NATURAL SCIENCES OF PHILADELPHIA. 483 



Gen. remarks. This species is readily distinguished from C. leinnis- 

 c a t u s , the latter having but nine lines, the middle one of which bifurcates 

 toward the occiput, and the sides more or less white spotted. 



Cnemidophorus quadrilineatus nob. 



Spec. char. Nostril between the naso-rostral and naso-frenal plate ; five 

 supra-labials ; eight rows of abdominal scales ; color brownish black above ; 

 jet black upon the sides, with two very narrow white lines, extending from 

 the temples in a line with the posterior margin of the eye, extending as far as 

 the posterior extremities ; a single row of broad scales upon the anterior sur- 

 surface of the forearms. Total length 3 inches 3 lines. 



Description. The above appears to be one of the smallest of the species of 

 Cnemidophorus. It is readily distinguished by its small size, and the pecu- 

 liarity of its markings ; in front of the gular fold is a row of four large scales, 

 followed by several smaller ones ; the back, between the two inner stripes, is 

 vermiculated with black, the sides white spotted ; the tail presents a white 

 lateral stripe, a continuation of the lower one upon the side ; under parts 

 bluish, lighter upon the chin. 



Dimensions. Length of head 5 lines ; of body to vent 11 lines ; length of 

 tail 2^ inches ; total length 3 inches 4 lines. 



Habitat. Nicaragua. Four specimens. 



Gen. remarks. Cnemidophorus prresignis B. $ G., from Chagres, said 

 also to be common at Para, has ten rows of abdominal plates. 



Ameiva Cuvier. 

 Ajieiva pulchka nob. 



Spec. char. Nostril between the naso-rostral and naso-frenal plates ; a 

 group of large scales upon the chin, surrounded by smaller ones ; three 

 or four large scales in front of the gular fold, surrounded by smaller scales ; 

 eight rows of abdominal plates ; color olive above, with two lateral stripes of 

 brown, one on each side, with numerous transverse rows of black. Total 

 length 8 1 2 inches. 



Description. This is a beautiful species of Ameiva, presenting distinctly 

 the characters of the genus, viz. . the retractility of the tongue beneath the 

 glottis, which distinguishes Ameiva from Cnemidophorus. In a natural 

 series, it would take the place of Ameiva Sloanei, which it resembles very 

 closely in size, but the neck is not near so narrow as in that species ; there is 

 but a single row of large transverse scales in front of the forearm ; the granu- 

 lations upon the back are distinctly larger than those upon the sides ; twenty 

 femoral pores ; the color of the head is light brown above, and upon the sides ; 

 olive colored or light brown tipon the back, with a band of deep brown along- 

 each side, presenting numerous transverse bars of black ; abdomen bluish, the 

 rest of the under surface white, with a tinge of blue ; in many of the speci- 

 mens a row of white spots extends from the tympanum to the posterior 

 extremity, occasionally assuming the form of a very narrow white line ; a 

 white spot upon the temple, and three or four around the margin of the tym- 

 panum. Eighteen specimens. 



Habitat. Nicaragua. 



Scincidje Ophiophthahnidce. 



Among the saurians of the collection from Nicaragua are two small lepido- 

 saurians belonging to the subfamily Ophiopthalmidse, and which appear to 

 belong to a genus not yet described, having four toes to each of the anterior, 

 and the same number to each of the posterior extremities. For the dis- 

 tinctive characters of the genera already known, see D. etB., torn, v., 

 808-831. It may be thus characterized ; No eyelid ; nostrils lateral, opening 

 in a single scale ; no supero-nasals ; teeth conical, simple ; tongue bifid, 



I860.] 



