46 ON AUSTRALIAN LEUCOSIID^E, 



it differs however, in the marking of the carajmce, which, in place 

 of being covered with reticulating lines, is onamented with a 

 single, thick, somewhat S-shaped green line on the lateral parts of 

 the branchial region, and four large green spots nearer the middle 

 line. Should the examination of further specimens shew those 

 points of difference to be constant, the name of L. viridimaculata 

 may be given to this variety. 



Sp. 6. Leucosia Perryi, Miers, (I c, p. 238, pi. 38, figs. 19—21). 

 Testa sub-depressa ; f ronte tridentato ; sinu thoracico nullo ; 

 brachiis ad basin dense tuberculatis ; carpo manuque Iambus. 



Hal. Shark's Bay, Western Australia, (Brit. Mus.). 



Sp. 7. Leucosia pubescens, Miers, (I. c, p. 238, pi. 38, figs. 22 

 — 24). Testa convexa, Laevi, polita ; regionibus hepaticis concavis, 

 lasvibus ; fronte tridentato, supra piano ; sinu thoracico margine 

 anteriori leevi, haud definite, pubescenti ; brachiis supra 

 pubescentibus. 



Hal. Shark's Bay, Western Australia. (Brit. Mus.). 



Sp. 8. Leucosia pulcherrima, Miers, (I. c, p. 236, pi. 38, figs. 

 4 — 6.). Testa leevi, convexa, antice sparsim punctata, figuris 

 trifoliaceis binis confluentibus, binisque circularibus distinctis 

 ornata ; sinu thoracico prof undo, angusto, antice bene definito ; 

 carpo manuque hevibus. 



Hal. Lizard Island. (Brit. Mus.). 



Sp. 9. Leucosia neocaledonica, A. Milne-Edwards, (Nonv.Arch. 

 Mus., X, (1874), p. 40, pi. ii). I have not seen the description of 

 this species ; but, from the remarks of Mr. Miers in the paper 

 above cited, it seems to me probable that two specimens from 

 New Caledonia in the Macleay Museum are referable to it ; 

 and, if this conjecture be correct, some specimens obtained by 

 the Ohevert from the Howick Group of Islands, being seemingly 

 specifically identical with these, are to be placed under this head. 

 They differ from L. pulcherrima Miers, chiefly in the colour and 



