Victorian Decapod Crustacea. 61 



The chelipeds of the male have the hand with the teeth more 

 prominent, and with the median tubercle well defined; the wrist 

 with the tubercle prominent and bifid, the arm with the outer 

 tubercle well defined. The hairs are stouter, shorter and straight. 



On the pleon of the male the tubercles are absent on the first 

 and second somites, the succeeding ones have a depression in the 

 median line which is filled with hair. 



The outer maxillipedes are similar to those from New Zealand. 



In the examination of a number of specimens these features are 

 not found to be constant, and a large series of adult males from 

 each locality must be observed before we are prepared to divide 

 them into distinct species. In the Norfolk Island examples the 

 various points in which the species difi"ers from others of the same 

 genus are more clearly defined, and the hairs clothing the carapace 

 are stronger, straighter and slightly more numerous than in 

 those from the other localities — this may be due to its tropical 

 habitat. 



It is worthy of note that Lake Pupuke in New Zealand, 

 although near the sea is cut ofi" from it by sheets of recent basalt, 

 while Lake Colac is also surrounded by tertiary basaltic fiows, 

 but is situate some 35 miles from the nearest sea, which is 

 separated from it by a high range of hills. 



We have refigured the species from Victorian examples. 



Tribe — Dromiidea. 



Family — Dromiidae. 



Cryptodromia wilsoni, sp. nov. (PI. IX.). 



All parts, except the tips of the fingers and dactyli, thickly 

 covered with a dense spongy tomentum, which on the dorsal 

 surface of the carapace is markedly ridged and pitted, the ridges 

 defining the regions. 



Carapace much broader than long and deeply convex — on 

 removal of the tomentum the surface is smooth, with the regions 

 not so clearly defined. 



Front cut into three teeth — the centi'e one, which is on a 

 lower plane than the two upper ones, is small and acute, the two 

 upper ones are larger and obtuse. 



