CONTENTS. 
Introduction 
Mysidacea. 
Family Mysidar. 
Siriella imiasei Nak. 
Gastrosaccus vulgaris Nak. 
Rhopalophthnlmus egregius Hansen . . 
Nanomysis, gen. nov. 
Nanomysis siamensis, sp. nov. 
Neomysis nigra Nak. 
Neomysis awatschensis Brandt. 
Anisomysis ijimai Nak. . . 
Tanaidacea. 
Family Ap.skudidae. 
A pseudes sp. 
ISOPODA. 
Family Asellidae. 
Asellus aquaticus (Linn.). 
Caecidoihea kawamurai. sp. nov. 
Family Cymothoidae. 
Tachaea chinensis Thiel. 
Ichthyoxeniis japonensis Rich. 
Family Sphaeromidae. 
Exosphaeroma oregonensis Dana 
Exosphaeroma chinensis, sp. nov. 
Family Idoteidae. 
Cleantis annandalei , sp. nov. 
Family Ligiidae. 
Ligia exotica, Roux. 
