300 PERCY SLADEN TRUST EXPEDITION. 
Two specimens from Isle de Lix, Glorioso Islands, were presented to the British 
Museum by the Earl of Crawford (R.Y. ‘ Valhalla’). A third specimen from Glorioso 
Island (Capt. Pearson) is in Mr. Gardiner’s collection. 
Very closely allied to S. melanura, Gthr., from Madagascar. Distinguished by the 
broader frontal shield and the coloration. 
Another close ally of S. melanura is S. teres, Vaillant, from the Comoro Islands. 
RHIPTOGLOSSA. 
20. Chameleon tigris, Kuhl. 
Mahé: Chateau Margot, 1400 f.; Cascade. Praslin. 
This well-known species has also been reported from Zanzibar, but the specimens may 
have been brought over from the Seychelles. 
OPHIDIA. 
21. Boodon geometricus, Schleg. 
Mahé: Cascade, 1000 f. Frigate Island (Mr. Dupont). 
This Snake is confined to the Seychelles. 
22. Lycognathophis sechellensis, Schleg. 
Mahé: Cascade, 1000 f.; Chateau Margot, 1400 f. Praslin. Frigate. Silhouette. 
This Snake belongs to a monotypic genus peculiar to the Seychelles. The coloration 
varies very much. Specimens from Silhouette are grey, yellow, pale brown, dark 
brown, or nearly black above; greyish white, uniform or more or less speckled with 
brown, bright yellow, or black beneath. 
EXPLANATION OF PLATE 40. 
Fig. 1. Praslinia cooperi, nat. size. 
la. i 33 Side view of head, x 23. 
5; > Open mouth, x 3h. 
2. Nesomantis thomasseti, nat. size. 
2a. 4 Open mouth, nat. size. 
3. Sooglossus sechellensis, nat. size. 
3a. 5 es Lower view of hand, x 4. 
4.  Hemidactylus gardineri, nat. size. 
as = Chin, x 22. 
Ab. 3 4 Lower view of foot, x 34. 
5.  Scelotes gardineri, nat. size. 
6. Sepsina valhalle, nat. size. 
