30 Mr. W. A. Haswell on the Australian Amphipoda. 



wards the posterior margin ; the lateral spines not thickened 

 at base. Outer margin of the dactyli of the raptorial limbs 

 unarmed at base (not unituberculate, as in 8. Desmarestii). 

 Appendages of the thoracic limbs membranaceous and broaden- 

 ing from base to apex. Inner lobe of the base of the uropoda 

 margined with narrow and very acute spines gradually in- 

 creasing in length ; inner lateral lamina3 linear, eight times as 

 long as broad ; outer with the first joint longer than the 

 second. 



Ha b. Japan. 



A single specimen was known to De Haan. 

 [To be continued.] 



II. — Preliminary Report on the Australian Amphipoda *. 

 By William A. Haswell, M.A., B.Sc. Edinburgh. 



A STUDY of the Amphipodous Crustacea of Australia during 

 the last few months has revealed features of special interest in 

 that department of the southern marine fauna. The field of 

 research has been almost entirely untouched; for, though 

 Milne-Edwards f, Dana J, Stimpson §, and Spence Bate || 

 have described a few Australian forms, the total number of 

 species hitherto known amounts only to thirteen — these being 

 chiefly Orchestidse, the few Gammaridse described not including 

 any of the forms which must be regarded as peculiarly Aus- 

 tralian. 



Between the amphipodous fauna of Temperate Australia as 

 exemplified in Port Jackson and that of tropical Queensland 

 a well-marked dividing-line may be drawn. In temperate 

 latitudes on the Australian coast littoral and circumlittoral 

 Algas are extremely abundant and varied in sheltered situa- 

 tions, giving, with the numerous varieties of sponges and 

 phytoid Polyzoa, a well-marked facies to the shallow-water 

 life of these shores, and affording ample feeding-grounds and 

 lurking-places for myriads of edriophthalmous Crustacea. 

 It is here that the characteristic Australian forms are to be 

 found. Within the tropics, on the other hand, Algae are 



* Descriptions and figures of the new species will appear in the ' Pro- 

 ceedings of the Linnean Society of New South Wales ' for the present 

 year. 



t 'Histoire Naturelle des Crustace"s,' torn. iii. (1837). 



X ' Proceedings of the American Society of Natural Science, Boston/ 

 vol. ii. ; and ' Crustacea of the U.S. Exploring Expedition.' 



§ ' Proceedings of the Academy of Natural Sciences of Philadelphia 

 (1855). 



|| ' Catalogue of Amphipodous Crustacea ' (1862). 



