370 PERCY SLADEN TRUST EXPEDITION 



3. Spherillo collaris Budde-Lund. 



4. ,, parvus Budde-Lund. 



5. Angara lenta Budde-Lund. 



6. Pag ana dimorpha DoUfus. 



7. „ maculosa Budde-Lund. 



8. „ fissifrons Budde-Lund. 



9. Metoponorthus pruinosus Brandt. 



10. Aphiloscia annulicornis Budde-Lund. 



Four species, nos. 1, 3, 6, 7, are known only from Mauritius. The other six species 

 are found in Madagascar and the East Indies. 



Li my paper on the Isopoda from Madagascar (Budde-Lund (5)) I have recorded 

 32 species as inhabiting that large island. 



L. A. Borradaile in his paper on the Land Crustaceans in the Fauna : Maldives and 

 Laccadives, vol. i., p. 28, has recorded six species from those islands : 



Ligia exotica Boux. 



Porcellio maldivensis Borradaile = Agnara madagascariensis Budde-Lund ? 



Alloniscus maldivensis ^ovrad-Aile = Alloniscus pigmentatus Budde-Lund? 



Philoscia gracilis Budde-Lund ? = Setaphora sp. 



sp. 



Cubaris murina Brandt. 



The descriptions of the new species given by Borradaile are very superficial* and 

 apply to many different species, being without essential characters. 



Besides the Isopoda collected by the Sealark Expedition Mr Thomasset during 

 a sojourn at the Aldabra Islands has taken a new species, Tura angusta, which I on this 

 occasion describe together with the other species of this genus. 



This small collection of the Isopod-Fauna confirms the conclusion I have drawn 

 (Budde-Lund (2), p. 40) that the Seychelles Islands and East Madagascar are remnants of 

 a submerged continent, which occupied a large part of the globe, now to a great extent 

 covered by sea. 



While the Seychelles Islands, East Madagascar, Mauritius and Bourbon mark the 

 occidental outline of this submerged continent, the west coast of South America is its 

 oriental outline, confined by the Andes mountains ; of the countries between these two 

 outlines some of the East Indian Islands, the Malay Peninsula, East Australia, New 

 Zealand and the Pacific Islands are remnants. In those times certainly North and South 

 America were separated, and several of the West Indian Islands (Cuba, Porto Rico and 

 Jamaica) were belonging to a submerged continent. 



* It should be remembered that Borradaile's paper was pubHshed in 1 901 before the dawn of that new era, 

 in which, as a comparison of Herr Budde-Lund's earlier and later writings clearly testifies, the terrestrial 

 Isopoda have been enabled to claim a far more searching analysis than in earlier times they were accustomed 

 to receive. 



