84 
Annals of the Transvaal Museum. 
According to the description they are to be distinguished by the 
character of the naso-rostrals, and by the number of subdigital lamellae 
a character which, as I have shown above, is variable in fasciatus. Unless 
the character of the first labial be found to show a constant difference 
in the two species this recently described form will have to be reduced 
to a variety of fasciatus. 
Pachydaclylus formosus Smith.— We have specimens from the Busten- 
burg District agreeing with the form described by Mr. Boulenger as afhnis 
(Ann. Mag. Nat. Hist., 6, 2, 138), which more recently is united with 
formosus (Zool. Jahrb., 25, 410). Immature specimens of this species 
and of capensis may easily be confused together, especially as the naso- 
rostral character is only available in the adults. 
In our specimens the head is battened from above, the back is irregu- 
larly spotted with dark-brown, and there are traces of five or six thin white 
stripes across the back. A single specimen from Krabbefontein (Zout- 
pansberg District), which I refer with some doubt to this species, has the 
naso-rostrals united, but the dorsal tubercles of the back are numerous 
and disposed quite irregularly. 
Pachydaclylus mentomarginatus Smith. — This species was described 
from small specimens, which, as suggested in the B. M. Catalogue, are 
probably immature. The only character by which it can be distinguished 
from P. formosus is that of the mentum, as the scaling on the head, body, 
and limbs is precisely the same in the two species, and the type of coloration 
in mentomarginatus is common to very young individuals of formosus. 
The mentum in typical specimens of formosus from western Cape Province 
shows some variation, and though it is normally reduced posteriorly there 
are one or two specimens (in the South African Museum) where it is scarcely 
reduced behind, and such specimens might be referred to either of these 
two species. I suspect therefore that mentomarginatus will have to sink in 
formosus. 
Pachydaclylus rugosus Smith. — This is a very distinct species. The 
characteristic conical tubercles are particularly conical and high on the 
dorsal surface of the neck. In P. formosus s. str. there is some approach 
to this condition in the dorsal neck tubercles, but they are not so high 
nor so definitely conical as in rugosus. The colour markings in the two 
species are somewhat similar, but the white bands of rugosus are much 
broader than those of formosus. 
Subconical ventral scales are not found in any other species of 
Pachydactylus. 
Pachydactylus oshaughnessyi Boul. — Mr. Chubbs’ specimens agree 
precisely with the figure given in the B. M. Catalogue. The dorsal tubercles, 
however, cannot be said to be definitely conical, and they show some 
approximation to the condition that obtains in P. capensis ; from this 
species they are at once distinguished by their smooth flattened head scales 
and from other allies of capensis by their united naso-rostrals. 
Pachydactylus maculalus Gray. — The type of colour pattern is very 
constant in the species, but the scaling varies somewhat. There is con- 
siderable variation in the degree of enlargement of the larger tubercles, 
some being subconical or even conical, and though usually the enlarged 
