Eremias. 287 



carries priority. Aujhow, we must regard E. benguelensis as probably 

 derived from E. undata, aud the latter from E. naniaquensis. 



17. EREMIAS BENGUELENSIS. 



Eremias benguelensis, part., Bocage, Joni. Sc. Lisb. i, 1867, p. 229. 

 Eremias namaquensis, part., Bocage, Herp. Augola, p. 31 (1895). 

 Eremias benguelensis, Bouleug. Jouru. Zool. Ees. iii, 1918, p. 5. 



Head aud body rather strongly depressed. Head 1^ to 1} times as 

 loug as broad, its length 31 to 4i^ times iu length to vent, its depth 

 equal to the distance between the centre of the eye aud the tympanum ; 

 snout pointed, Avith the nasal shields feebly swollen, as long as the 

 postocular part of the head, with sharp canthus and feebly concave 

 loreal region ; a distinct concavity in the middle of the upper surface 

 of the snout, extending to the middle or posterior third of the frontal 

 shield. Pileus If to 2 times as long as broad. Neck as broad as the 

 head or a little constricted. Hind limb reaching the ear or between 

 the ear and the eye in males, the shoulder or the collar in females ; 

 foot li to If times as long as the head ; toes rather slender, feebly 

 compressed. Tail 1>; to 2} times as long as head and body. 



Upper head-shields fiat, smooth. Nasals in contact with each 

 other behind the rostral, the suture between them f to | the length of 

 the frontonasal, which is a little broader than long ; prefrontals as 

 long as broad or longer than broad, forming a short median suture or 

 separated* by a small azygos shield ; frontal as loug as or shorter 

 than its distance from the end of the snout, 1} to 2 times as loug as 

 broad, -J to } of its lateral border in contact with the large supra- 

 oculars ; parietals 1^ to 1} times as long as broad ; interparietal much 

 larger than the frontoparietals, usually in contact with the occipital, f 

 which is often as broad and always much shorter. Two supraoculars, 

 the first as long as or a little longer than its distance from the anterior 

 loreal, the space in front of it filled by 7 to 15 scales or granules ; 6 

 or 7, rarely 5, superciliaries, first longest, separated from the supra- 

 oculars by a series of granules. Three nasals, lower in contact with 

 the rostral and the first upper labial, posterior small; anterior loreal 

 as long as deep or a little longer than deep, shorter than the second ; 

 4, rarely 5, upper labials anterior to the subocular, which is keeled 

 below the eye and largely borders the mouth, its lower border much 

 shorter than the upper. Temporal scales granular, smooth ; a narrow 



* In 4 specimens out of 15. 



t In 2 spechnens a small shield separates them. 



