Reptiles from Johanna , Comoro Islands. 
217 
Centetes ecaudatus. 
That old specimens, presumably males, have the skull, and 
more especially the fore part of the snout, developed in an 
extraordinary manner is a fact which has been previously 
ascertained from Madagascar examples. Thus, the British 
Museum possesses, among others, an example from Vohima, 
which measures about 10 inches from the tip of the snout to 
the extremity of the rump, its skull being not less than 41- 
inches in length. Specimens from Johanna grow to a still 
larger size, individuals 16 inches in length being apparently 
not scarce. As far as I can judge from these dried speci¬ 
mens, their skull cannot be less than 5 inches in length. The 
proportions between the head and the body seem, therefore, to 
be subject to great variation; and in no other respect do the 
Johanna individuals differ from those obtained in Madagascar 
or Mauritius. The young are banded in the same manner ; 
and older ones have sometimes a whitish, sometimes a 
blackish crest of prolonged hairs along the median line of the 
hinder part of the back. 
Of the Reptiles collected by Mr. Bewsher, Euprepes como- 
rensis (Ptrs.), Phelsuma cepedianum (Ouv.), and Hemidac- 
tylus platycephalus (Ptrs.) were previously known to occur in 
the island. The second is common throughout Madagascar 
and the Mascarenes ; and the third has been probably im¬ 
ported from the mainland. 
New to its fauna are:—an Eremias , of which there is only 
one example, too young to be specifically determined; an 
undescribed Phyllodactyline Gecko, Paroedura sancti johannis ; 
Typhlops pammeces (Gthr.), hitherto known from Southern 
India only; and an undescribed Lycodont snake, Lycodryas 
sancti johannis. 
I subjoin the descriptions of the new species :— 
Parceduka, g. n. Geckotid. 
This genus is allied to CEdura and Discodactylus ; from 
the former it differs by its lepidosis, from the latter by 
the scutellation of the toes. Toes, as in Phyllodactylus , 
rather slender, each with a pair of dilated terminal lamellae, 
between which the claw is lodged; each toe with a double series 
of plates beneath in its whole length. Claws five in front and 
behind. Upper parts covered with numerous large keeled 
tubercles, which are serially arranged, leaving but little space 
for the finer granulation. Tail cylindrical, tapering, with 
