SYSTEMATIC ACCOUNT 187 



Distribution. The three stations at which this species was collected are all on the Patagonian 

 Shelf. St. WS. 237 (46° 00' S., 60° 05' W.) lies some distance farther north than the other two, 

 towards the edge of the shelf. Sts. WS. 756 and WS. 783 are both a little north of the Falkland 

 Islands. 



SUMMARY 



1. The paper deals with fifteen species in the Discovery collections, 1925-36, belonging to the 

 families Idoteidae, Pseudidotheidae and Xenarcturidae fam.n. 



2. One new genus and five new species are described: Xenarcturiis spimilosus, Edotia ociilopetiolata, 

 E. corriigata, Psendidothea scutatiis { = Microarctunis scutatus Stephensen, 1947) and Arcturides 

 aciiminatus. 



3. Points of morphological interest, including modifications in the form of the brood pouch of 

 Edotia, are discussed. 



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