456 OB THE AUSTRALIAN BRACHYTRA OXYRHYXCHA, 



tlie cardiac region ; one on each branchial region. Antero-lateral 

 margins with two teeth, situated close together, the anterior low. 

 triangular, blunt, the posterior, occupying the lateral angle, more 

 prominent, triangular, acute. Supra-orbital tooth pointed, 

 proj ecting slightly beyond the front. Ambulatory limbs compressed: 

 third joints of the second, third, and fourth pairs with a tooth at 

 the distal end of the upper border ; upper border of the third joint 

 of first pair with two small tubercles towards the middle above, 

 that of the second and third pairs each with a single tubercle in 

 the same situation Abdomen (of niale^ with lateral fringes of 

 hairs. In other points resembling Harrovia albo-lineata. 



Hah. Darnley Island (" Chevert' ? Exped.) 



Of the genera mentioned above only three — viz., Stenorhynchus, 

 Adieus, and Zambrus. — all of which are found in European seas — 

 extend beyond the Oriental Eegion of Prof. Dana. Of the genera 

 confined to the region, many have a wide range within its limits ; 

 these are especially Camposcia, Menathius, Jficippa, Paramicippa, 

 and Cryptopodia ; while others, though seemingly confined to the 

 "West Pacific, extend between, or at all events are common to Xew 

 South Wales and Japan, having in some cases representatives 

 in Xew Zealand, Eiji. Xew Caledonia, Borneo, the Philippines, 

 and the coast of China. Among the rarer genera Zebrida has 

 hitherto only been observed in Borneo; Xenocarcinus in Xew 

 Caledonia, tropical Australia, and perhaps in the Indian Ocean ; 

 Harrovia in Borneo and the Philipines ; Gonatonoius only in Borneo; 

 Jlicippoides in Eiji ; while CMorinoides and Gonatorhynchus are, 

 so far as at present known, peculiar to Australia. 



So little is known of the marine zoology of the south of 

 Tasmania and the west coast of Australia that it is impossible to 

 treat with any degree of minuteness of the geographical 

 distribution of genera within the Australian province. Two 



