BOULENGER— REPTILES. 295 
From the account of Mahé specimens given by P. Schacht *, it is not improbable 
that 7. daudinié will also have to be referred to the synonymy of 7. gigantea. 
Whether the recently described 7. gouffei, Rothschild +, from Therese Island, St. Anne’s 
Channel, is specifically distinct is difficult to say, as the description rests on a single 
specimen. I suppose “double nuchal plate” to be a slip for “double caudal plate” in 
that description. 
No remains of the large tortoise which once lived on the Seychelles appear to be 
preserved. It is therefore impossible to decide whether 7. gouffei is a survivor of these 
or whether, like the tortoises of Aldabra, it has been imported from other islands. 
2. Sternotherus sinuatus, A. Smith. 
A single adult specimen from La Digue Island, Seychelles, answers entirely to my 
definition of this species in the ‘Catalogue of Chelonians,’ p. 194. Specimens from the 
same island have been referred by Stejneger $ to S. négricans, which has a shorter and 
thicker shell, a broader interorbital region, and no trace of cusps on the sides of the 
median notch of the upper jaw. 
This specimen is well matched by two from Mazoe, Mashonaland, presented to the 
British Museum by Mr. J. ff. Darling. As in them, the plastron is black, whilst it is 
uniform yellow in the specimen from La Digue Island, mentioned in the ‘ Catalogue of 
Chelonians.’ I feel therefore unable to accept the “subspecies seychellensis”’ proposed 
by Siebenrock §. 
The habitat of §. senwatus extends from Somaliland to Natal. 
3. Sternotharus nigricans, Donnd. 
Two specimens from Diego Garcia. 
Inhabits Portuguese East Africa, N.W. Rhodesia, and Madagascar. 
EMYDOSAURIA. 
34. Crocodilus niloticus, Laur.? (Extinct.) 
Fragments of skull and mandible from a marsh at Anse Royale, Mahé, received from 
Mr. H. P. Thomasset and Mr. L. Tonnet, are, so far as I can judge, not separable from 
. niloticus, which occurs over nearly the whole of Africa, as well as in Madagascar. 
LACERTILIA. 
4. Diplodactylus inexpectatus, Stejneger. 
Wahé: Cascade, 1000 f.; Cascade Estate, 800 f.; Chateau Margot, 1400 f. 
When this species was described by Stejneger in 1894, the genus Diplodactylus was 
believed to be restricted to Australia. Several species have, however, since been 
described from Madagascar, one from German Hast Africa, and one from the French 
Congo. 
* Wiss. Ergebn. Valdivia, iii. 1902, p. 104. Cf. also Siebenrock, Zool. Anz. xxvi. 1903, p. 366. 
t+ Noy. Zool. xiii. 1906, p. 753. 
+ Proc. U.S. Nat. Mus. xvi. 1894, p. 713. § Voeltzkow’s Reise O.-Afr. ii. Schildkr. p. 38 (1906), 
