378 PERCY SLADEN TRUST EXPEDITION 



Seychelles Archipelago : Silhouette and Curieuse Island very abundant : Praslin, 

 Cascade, 700 ft. ; Mah^, on Mt. Harrison, alt. 2000 ft. ; Trois Freres, 1500 ft., the 17th 

 Nov. 1905 : Desroches, very common in sand hills. Already Prof. Mobius had taken this 

 species in the Seychelles, also M. Ch. AUuaud in Mah^ and Marianne (sec. DoUf). 

 Specimens from Mahe are also preserved at the Museum, Hamburg, found by Dr A. 

 Brauer. 



Concerning the wide distribution of this species, consult the I.e., 2, p. 119, where all 

 the hitherto known localities are mentioned. I can add that specimens have been 

 obtained from Cocos-Keeling Island (Mr Wood-Jones in Museum, London). 



Genus Porcellio Latreille, Hist. Nat. Crust, et Ins., vol. vii., p. 45, 1804. 



Budde-Lund (5), p. 280. 



Subgenus Tura Budde-Lund (5), p. 282, 1908. 



During his stay at the Aldabra Islands in 1907, Mr H. P. Thomasset took several 

 specimens of a little new species belonging to this genus. Till then I knew only one 

 species, also from the Aldabra Islands, taken by Prof. Voeltzkow, who had secured it also 

 in N. Madagascar. Subsequently I have seen two more new species from Abyssinia ; later 

 on I give a review of all these nearly related species. 



14. Tura angiista, n. sp. 



Superficies squamis minutissimis dense obtecta. 



Frons cum epistomate superiore leviter producta, crista squamarum minutissimarum 

 ante marginata ; processus laterales minores, late rotundati. 



Trunci segmenta 1, 2, 3 margine posteriore curvato, segmentum 4 margine posteriore 

 subrecto, segmenta 5,6,7 margine posteriore in medio fortius incurvo ; anguli laterales 

 posteriores segmentorum 1, 2, 3 late rotundate obtusi, segmenti 4 rotundate subrecti, 

 segmentorum 5, 6, 7 acutiores. 



Caudae epimera segmentorum 3, 4, 5 longiora, angusta, acuta, subadpressa. 



Telsum breve, triangulum, epimera segmenti 5 satis superans, lateribus fortiter 

 incurvis, apice acutissimo. 



Color e fusco brunneus, obscure pallide maculatus. 



Long. 4"5 mm. Lat. 2 mm. 



Distribution. Aldabra : several specimens (H. P. Thomasset). 



15. Tura testacea. 



Tura testacea Budde-Lund (5), p. 282. Tab. 14, fig. 1—14, 1908. 



Superficies squamis minutis dense obtecta. 



Frons media cum superiore epistomate leviter bulbose producta, ante obscure 

 marginata ; processus laterales rotundate obtusi. 



Trunci segmenta 1, 2, 3 margine posteriore curvato, segmenta 4 — 7 margine 

 posteriore in medio leviter incurvo; anguli laterales posteriores segmentorum 1, 2, 3 



