4. ZONOSAFRXTS. 5. TRACnRLOPTTCnUS. 129 



anterior to tho siibooilur. Dorsal scales strongly striated, in 24 

 or 20 longitudinal series ; the ventral shields of the outer scries 

 also striated. Femoral pores 10 to 13. Grey-brown above, with 

 irregular longitudinal scries of small black spots ; sides with bluish- 

 white spots ; limbs rutbus ; three or four black longitudinal streaks 

 on each side of the throat. 



A var. suhunicolor is distinguished by the almost uniform dark 

 brown colour of the upper surfaces, and the absence or indistinctness 

 of the gular streaks ; the median keel of tho dorsal scales is stronger 

 than in the typical form. 



millim. millim. 



Total length 162 Fore limb 20 



Head 13 Hind limb 38 



Width of head .... 10 Tail 1U7 



Body 42 



Nossi Be. 



a-b. Ad. & hgi". Nossi Be. Senckenberg Museum [E.]. 



5. TRACHELOPTYCHUS. 



Tracheloptychus, Peters^ Mon. Berl. Ac. 1854, p. 617, and Reise n. 

 Mossamh. iii. p. 62. 



Nostril pierced between the rostral, the first labial, and two 

 nasals ; prncfrontal and frontoparietal shields present. Lower eye- 

 lid scaly. No lateral fold on the body. Dorsal and ventral scales 

 arranged quincuncially ; laterals forming straight longitudinal and 

 transverse series. Subdigital scales keeled. Tongue entirely covered 

 with rhomboidal papillae. 



Madagascar. 



1. Tracheloptychus madagascariensis. 



Tracheloptychus madagascariensis, Peters, II. cc. pi. viii. fig. 3. 



Habit lacertoid ; body shghtly depressed. The hind limb reaches 

 the tympanum. A fold along each side of the neck. Nuchal scales 

 pluricarinate, dorsals unicarinate. 20 to 22 femoral pores on each. 

 Tail about once and three fourths the length of head and body. 

 Olive-brown above, spotted with blackish brown ; three longitu- 

 dinal white lines on the back, the median bifurcating anteriorly ; 

 hinder side of thighs with two black and two white longitudinal 

 lines ; lower surfaces dirty white. 



millim. millim. 



From snout to vent . . 52 Fore limb 19 



Head 13 Hind limb 39 



Width of head 8 



St. Augustin's Bay, W. Madagascar. 



TOL, III. K 



