No. XXII. —TERRESTRIAL ISOPODA, PARTICULARLY CONSIDERED IN 

 RELATION TO THE DISTRIBUTION OF THE SOUTHERN INDO- 

 PACIFIC SPECIES*. 



By the late Dr G. Budde-Lund, Copenhagen. 



(Communicated by Prof. J. Stanley Gardiner, M.A., F.R.S., F.L.S.; 

 Revised by Rev. T. R. R. Stebbing, M.A., F.R.S.) 



(Plates 20—22.) 



Read 20th June, 1912. 



I 



The collections of Terrestrial Isopoda obtained from the islands of the Indian Ocean 

 during the Sealark Expedition were made in the following localities : Chagos Islands, 

 Cargados, Coetivy, Farquhar, Amirante Islands, and Seychelles. 



While collections from the Seychelles Islands have been gathered by different persons, 

 until now no investigation appears to have been made with regard to these animals living 

 in the five first-mentioned localities. Consequently I have set forth here aU that I have 

 found belonging to the Isopod-fauna of these islands. 



From the Chagos Islands the Sealark Expedition has brought back the following six 

 species : 



Nagara nana Budde-Lund, a species found in Madagascar; I have also seen specimens 

 from Java and Sumatra. 



Metoponorthus pi'umosus (Brandt); this cosmopolitan species is taken in all the 

 islands and in great number. 



Alloniscus pigmentatus Budde-Lund ; this species, first found in Madagascar, was 

 later taken in many localities on the coasts of the Indian Ocean. 



Setaphoi'a pilosa, n. sp. This new species, which I describe below, is related to many 

 described and hitherto undescribed species found in the Indian islands. 



Olibrinus pigmentatus, n. sp. This new species, which I describe below together with 

 two other new species, one from Djibouti, the other from the Malay Peninsula, belonging 

 to the same new genus, points as well as the above-mentioned species to the aifinity of 

 the fauna with the fauna of the East Indies. 



Spherillo parvus Budde-Lund, from Madagascar, is spread over tlie islands of tlie 

 Indian Ocean. 



* All the footnotes are by the Revisor. 

 SECOND SERIES— ZOOLOGY, VOL. XV. 17 



