44 ON AUSTRALIAN LEUCOSIIL^E, 



borders of the first and second 'with, a shallow excavation on each 

 side ; those of the fourth and fifth with deep notches. No spines 

 in the middle of the posterior border of the sixth segment. Last 

 segment with a narrow mesial groove ; its apex spiniform ; its 

 lateral margins armed with several spines. 

 Length about 1^ inches. 



Sab. Palm Is. (Chevert Exped.). 



Contributions to a Monograph of Australian Leucosiilve. 



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



In Bell's Monograph of the Leucosiidre {Trans. Linn. Soc, 

 Vol. 21., p. 277, et seq.) seven species are mentioned as inhabiting 

 the Australian Coast. A recent paper by Mr. E. J. Miers of the 

 British Museum {Trans. Linn. Soc., 1877,^. 235), on this interesting 

 family of Brachyurous Decapods, has added six new species to the 

 list. From an examination of the Crustacea of the Chevert 

 Expedition, as well as other specimens in the Macleay Museum 

 which Mr. Macleay has kindly allowed me to study, together with 

 a few in the Australian Museum, which I have been permitted to 

 examine by the courtesy of Mr. E. P. Panisay, I am enabled 

 to add twelve new species to the list of Australian forms, and also 

 to indicate new localities for several species not previously known 

 to inhabit the Australian region. 



Genus I. — Leucosia, Eabricius. 



Sp. 1. Leucosia unidentata, Be LTaan. ( Crust. Japon., p. 133. 

 t. 33, fig. 3). " Eronte unidentata ; sinu thoracico antice circulari, 

 tuberculis perlalis circumscripto ; brachiis facie superiore seriebus 

 binis tuberculorum." 



Hal. Torres Sts. (Brit. Mus.). 



Sp. 2. Leucosia orbicularis, Bell, (Trans. Linn. Soc., Vol. 21, p. 

 284, pi. 30, fig. 1). " Testa orbiculari, fronte lato, brevissimo, 



