Victorian Decapod Crustacea. 59 



The dactyli are short and curved — those of the last pair being 

 turned forwards, while the others are turned backwards. The 

 first pair are the longest but are nearly equalled by the second, 

 the third are short and rudimentary, and lie above the bases of 

 the second, and the fourth are turned backwards along the sides 

 of the carapace and over the first pair, which they nearly equal 

 in length — all are covered with a dense tomentum except on the 

 tips of the dactyli — and the angles of the joints are fringed with 

 hairs. 



The abdomen in both se.xes is seven jointed — the first, second, 

 and part of the third joints being visible when viewed from 

 above, and bears a median convex ridge. 



The abdomen of the male is acutely triangular in shape, but 

 the terminal joint is rounded and obtuse. 



The sternal sulci of the female do not meet, but end on the 

 posterior part of the first segment of the sternum and between 

 the bases of the first pair of legs. Each is terminated by a raised 

 curved convolute ridge, excavate behind, the two prominences 

 meeting in the central line. 



Dimensions of Type. <?. 



Greatest lieadth of carapace 

 Greatest length of carapace 

 Length of chela 

 Length of 1st ambulatory leg 

 Length of 2nd ambulatory leg - 

 Length of 3rd ambulatory leg 

 Length of Ith ambulatory leg 



The female specimen (which is imperfect) is slightly larger 

 than the male. 



Habitat. — Our specimens were dredged by Mr. J. Gabriel, in 

 Western Port. 



Ohservations. — This species differs so markedly from any others 

 of which we have been able to obtain specimens or to compare 

 the descriptions, that we Iiave been compelled to create a 

 new genus for its reception. Its nearest alliance is with the 

 genus Droiiiia, Fabr., but it does not fall into any of the sub- 

 genera as defined by Dr. Alcock (Journal of the Asiatic Society 



