from Mossamedes, West Africa. 227 
It belongs to the Lacertia (Celodontes pristidactyles of the 
‘ Erpétologie Générale’). From its general organization it is in 
the vicinity of the genera Acanthodactylus and Eremias, perhaps 
between the two, that it should be placed; but the flattening of 
its head and the extraordinary widening of its muzzle give it a 
peculiar physiognomy, and render it perfectly distinct from all 
other Saurians in general. 
Generic characters.— Head wide and flattened; muzzle much 
depressed, wide, spatulate, with its trenchant margins greatly 
exceeding the outline of the opening of the mouth (figs. 1 & 2). 
Fig. 1. Fig. 2. 
Tongue sagittate, emarginate at its extremity, covered with 
squamiform papille. Palate not furnished with teeth. Nostrils 
looking directly upward, placed in the midst of three shields, as 
in Eremias. Rostral shield much depressed, forming with the 
first seven superior labials the projecting border of the muzzle. 
No free antepectoral fold. Ventral shields smooth, forming 
regular longitudinal and transverse bands. Tail broad and 
depressed at the base, rounded throughout the rest of its extent. 
No femoral pores. Five unequal digits on each foot; these are 
compressed, covered with smooth scales beneath, and denticu- 
lated at the edges. 
Pachyrhyncus Anchieta, sp. n. 
No occipital plate. Lower eyelid covered with granulations. 
Auricular opening narrow, its anterior margin smooth, without 
denticulations. Nostrils bordered by three shields—one naso- 
rostral and two freno-nasals. Nine superior labials, of which 
the first seven form with the rostral the trenchant margin of the 
muzzle. One subocular shield, in contact by its lower margin 
with the fifth, sixth, and seventh superior labials. Scales of the 
back and base of the tail very smail, smooth, slightly inflated, 
not imbricated ; those of the rounded portion of the tail large, 
imbricated, and keeled. Ventral shields quadrilateral, of mode- 
rate size, nearly equal, arranged in from twenty to twenty-four 
longitudinal rows, and bordered upon the flanks by several rows 
of similar but smaller shields. Przeanal scales numerous, small, 
nearly equal. 
