ON THE BATRACHIA AND REPTILIA OF COSTA RICA. 



Ill 



are twice as long as the first ; there are twenty scales in a cross-row between the 

 angles of the lower jaw. There is some irregularity in the pectoral scales which 

 gives the last row of the neck the appearance of a collar. Twenty-three series of 

 scales in an annulus of the body; twelve transverse rows between the large post- 

 occipital row and the line of the axillae, and forty-three to the line of the posterior 

 faces of the femora. There are two large longitudinal anal scuta, which embrace 

 a scale between them on the anal border ; they are preceded by another large pair, 

 but of reduced size. 



The tail is nearly twice the length of the head and body, and the hind limb is 

 one-fourth the latter measurement. 



Total length ..... ...... 



M. 



0.165 



Length of head and body 



.058 



" to axilla . ... 



.017 



" of head to tympanum 



. .011 



to orbit 



. .0045 



." of fore limb . . . . 



. .0130 



" of hind limb . . . . . . . 



. .0145 



The limbs are surrounded by large scales except on the concealed faces of the 

 humerus and femur, where the scales are small and flat. 



The color is light gray with red and green metallic reflections ; the sides are 

 brown, and the middle of the back darker than a line above the brown of the side. 

 Near the light bands a few scales are blackish, forming a row on each side. Below 

 dusted with brown. Head with deep brown sides and white upper lip. Sides of 

 tail brown with a zigzag upper margin. 



The lower eyelids of this species are very narrow, and having been dried I 

 cannot ascertain the presence or absence of a transparent disk. 



This new lizard was found by Mr. Gabb on the Aguacate Mountains. 



41. Amiva festiva, Licht. and Von M. A. eutropia, Cope, Proc. Ac. Phila., Feb. 1862. 



In adult males the dorsal band is wanting. The central preanal plate is fre- 

 quently followed by two scuta but little smaller. 



42. Amiva gabbiana, Cope, sp. nov. 



Abdominal scuta in eight longitudinal series, median gular scuta but little 

 larger than those surrounding them. Premaxillary teeth 4-1-4. Mesoptychial 

 scales in a single row of one median and three rapidly diminishing laterals on each 

 side ; the border of the collar with minute scales. One row of brachial scuta 

 nearly continuous with two rows of antebrachials. One principal row of rather 

 30 



