4. zoNosAURUS.—5. TRACHELOPTYCHUS. 129 
anterior to the subocular. Dorsal scales strongly striated, in 24 
or 26 longitudinal series; the ventral shields of the outer series 
also striated. Femoral pores 10 to 13. Grey-brown above, with 
irregular longitudinal series of small black spots; sides with bluish- 
white spots; limbs rufous ; three or four black longitudinal streaks 
on each side of the throat. 
A var. subunicolor 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 the 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. goaieqtetanies 107 
Body sc cec'd acne ges 42 
Nossi Bé. 
a-b. Ad. & her. Nossi Bé. Senckenberg Museum [E.]. 
5. TRACHELOPTYCHUS. 
Tracheloptychus, Peters, Mon. Berl, Ac. 1854, p. 617, and Reise n. 
Mossamb. iii. p. 62. 
Nostril pierced between the rostral, the first labial, and two 
nasals ; prefrontal and frontoparietal shiélds 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 scaleskeeled. Tongue entirely covered 
with rhomboidal papille. 
Madagascar. 
1. Tracheloptychus madagascariensis. 
Tracheloptychus madagascariensis, Peters, Ul. ce. pl. viii. fig. 3. 
Habit lacertoid; body slightly 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........-.+5405 13 Hind limb.......... 39 
Width of head ...... 8 
St. Augustin’s Bay, W. Madagascar. 
VOL. III. K 
