304 NOTE ON A DECAPODOUS CRUSTACEAN FROM QUEENSLAND, 



large oval prominence projecting on either side upon the hepatic 

 border, and three lesser wart-like elevations on the left side, and 

 two rather larger ones on the right side, which skirt the branchial 

 furrow. The cardiac region occupies the median line between the 

 two large branchial lobes, and is marked by a lai*ge peg-top-shaped 

 swelling, having the slender point directed towards the posterior 

 border and separated by a deep clear-cut furrow from the 

 branchial, hepatic, and gastric regions. The branchial regions are 

 roughly quadrant-shaped, having the arc of the quadrant directed 

 forward and inward towards the median line and the cardiac 

 region ; the sides and surface are somewhat inflated, and the 

 posterior border is straight and marked by the line of articulation 

 with the abdomen, which by its great breadth indicates that the 

 individual was a female. The branchial region of the carapace is 

 covered with small rounded pustules or tubercles, evenly 

 distributed over the surface. There is a trace on the matrix 

 behind the carapace, which indicates the remains of the abdomen. 



Affinities and Differences. — This Queensland crustacean carapace 

 offers points of close affinity with Prosopon verrucosum, Reuss, 

 and P. tuberosum, Von Meyer, both Neocomian species from the 

 Cretaceous of Boucherans, Dept. Jura. It differs from both these 

 forms in its more rounded contour, its more prominent branchial 

 regions, as well as in the general and well-marked distinctive 

 arrangement of the lobes marking the several regions of the 

 carapace. 



There can, however, be no doubt that there is a relationship 

 between these forms and the genus Dromilites of the London 

 Clay ; we must, however, wait for information as to the appendages 

 before venturing to say more. Meantime, I dedicate tliis Queens- 

 land fossil to my old friend and colleague, Robert Etheridge, Junr., 

 naming it Prosopon Etherldgei in compliment to one who has 

 contributed so much to our knowledge of the Palaeontology of 

 Australia. 



