378 Lacertidse. 



Matscliie, Sitzb. Ges. Naturf. Fr. Berl. 1892, p. 110 ; Tornier, Tliierw. 

 O.-Afr., Kriechth. p. 40 (1897) ; Bethencourt Perreira, Jorn. Sc. 

 Lisb. (2) V, 1898, p. 242; Tomier, Zool. Jahrb., Syst. xiii, 1900, 

 p. 593, and xv, 1902, p. 582; -Nieden, Mifct. Zool. Mus. Berl. vii, 

 1913, p. 79; Schmidt, Bull. Amer. Mus. IST. H. xxxix, 1919, p. 515, 

 fig., pi. xxiii, fig. 2. 



Bolaspis guentheri, subsp. lasvis, Werner, Verb. Zool.-bot. G-es. 

 Wien, xiv, 1895, p. 91, pi. v, fig. 4. 



Head, body and tail extremely depressed. Head If to 2 times 

 as long as broad, its deptb equal to the distance between the eye and 

 the tympanum, its length Sf to 4 times in length to vent in males, 

 4 to 4.5 times in females ; snout pointed, as long as postocular part 

 of head, with obtuse canthus. Pileus 2i to 2| times as long as 

 broad. Neck as' broad as or a little broader than the head. Hind 

 limb reaching the elbow or the axil in males, the wrist or the elbow 

 in females ; foot as long as the head or a little shorter ; fourth toe 

 but little longer than third. Tail li to IJ times as long as head 

 and body. 



Nostril pierced between two shields, widely separated from the 

 rostral ; frontonasal large, as long as broad or a little longer than 

 broad, forming a broad suture with the rostral ; prefrontals forming 

 a median suture ; frontal rather small, as long as or a little shorter 

 than its distance from the i-ostral, Ij to 2 times as long as broad, 

 a little narrower behind than in front; parietals IJ to 1| times as 

 long as broad ; interparietal very large, 3 to 4 times as broad as the 

 posterior part of the frontal, in contact with a i-ather small trapezoid 

 occipital. 4 large supraoculars* subequal in length or second the 

 longest, first in contact with the frontal ; superciliaries very small, 

 separated from the second and third supraoculars by a series of 

 very small granules. Anterior loi-eal as long as or shorter than the 

 second; 4, exceptionally 5, upper labials anterior to the subocular, 

 which is as long beneath as above. Temple covered with minute 

 granules ; a large tympanic shield, preceded by one or several enlarged 

 scales. 



5 pairs of chin-shields, first three in contact in the middle; gular 

 scales juxtaposed, 27 to 37 between the symphysis of the chin-shields 

 and the median collar-plate ; no gular fold. Collar with even edge, 

 composed of 7 to 14 rather small plates. 



The two series of large dorsal plates originating a short distance 

 behind the occiput ; each plate about twice as broad as long ; lateral 



* In a female from the Gaboon there are 5 supraoculars on the right side, 

 the foui-th being divided into two. 



