448 Records of the Indian Museum. [Vol XXIV, 



Indian species. Mediterranean species. 



Mysidopsis indica. M. gibbosa. 



Leptomysis xenops. L. apiops. 



Mesopodopsis orientalis. M. slabberi. 



Neomysis indica. N. longicornis. 



Polamomysis assimilis. P. pengoi. 



Heteromysis harpax. H. microps. 



The superficial resemblance between the Mysidacean fauna of 

 the two regions is thus seen to be most striking and the fact is 

 further emphasised if actual numbers are considered, for by far 

 the greatest numbers of specimens belong to those species which 

 are related to Mediterranean forms. 



My thanks are due to Dr. Annandale for the opportunity of 

 examining and reporting on this collection and to Dr. Kemp for 

 his successful efforts to obtain Mysidae at my request. I am 

 greatly indebted to my wife for the figures illustrating this report. 



Suborder I,ofhogastrida. 



Family LOPHOGASTRIDAE G. O. Sars. 



Genus Lophogaster M. Sars. 



Lophogaster intermedius Hansen. 



Lophogaster intermedius, Hansen, 1910, p. 14, pi. i, figs.ia-ie. 



Locality. — ' Investigator ' St. 532 : Mergui Archipelago, 62 

 fathoms, 16-IV-13. 



68 specimens, 10-20 mm. 



Distribution. — Only known from specimens captured by the 

 1 Siboga ' in the waters of the Kast Indian Archipelago. 



Suborder Mysida. 



Family MYSIDAE Dana. 



Subfamily SIRIELL1NAE Norman. 



Genus Siriella Dana. 



Siriella hanseni, sp. nov. 



Text-figs. ia-c, 2. 



Locality. — Pamban, Gulf of Manaar, from weeds, 0-2 fathoms, 

 February, 1913. Sixty specimens, 4-7 mm. (Types.) 



Description. — A Siriella belonging to Hansen's group I and 

 allied to 5. quadrispinosa Hansen and S. nodosa Hansen. 



Carapace in both sexes without protuberances or tubercles, 

 hardly at all produced into a frontal plate, anterior margin broadly 

 and evenly rounded, leaving exposed a small spiniform pseudo- 

 rostral process. 



