THE LAND CRAYFISHES OF AUSTRALIA. 121 



greatly enlarged. It is a general rule that the enlarged chela 

 (fig. 24) in this species has a broad and short propodite if com- 

 pared with that of the next species, E. victoriensis (PL XX. 

 fig. 33). 



There are no sperm-receptacles with conspicuous openings in 

 the female. 



The eyes are rather larger than in E.fossor, and the rostrum 

 is longer and ends in an upwardly diiected spine. The contour 

 of the forehead (PI. XYIII. fig. 26) is much less steep than in 

 E.fossor (PI. XIV. fig. 12). 



Thorax, abdomen, and tail-fan much as in E.fossor. 



Length. Specimen figured from tip of rostrum to end of telson, 

 60 mm. 



Localities : — 



1. Several specimens from Warburton, Victoria, 13.xi,05. 

 One specimen with equal-sized claws figured (fig. 23). Four 

 other sj)ecimens similar to this one in the matter of shape of 

 claws, though varying greatly in hairiness. One specimen witli 

 one very large and stout chela (fig. 24), not hairy ; the other 

 chela of this specimen was unfortunately missing. 



2. Two specimens from the Upper Yarra,, collected by Mr, 

 Williams in 1869 and 1871. In both the chelse are equal in size 

 and rather slenderly built. 



3. Two specimens from the top of Black Spur, Fernshaw, 1880. 

 In both these specimens the right chela is much larger and moi-e 

 massive than the left, which is elongated and narrow. One other 

 small specimen from Fernshaw has the chelae similar and equal. 

 Another specimen, simply labelled " Victoria," resembles the 

 last-named. 



4. One very large specimen from Healsville, Victoria, 5. vi. 82, 

 has the right chela enlarged and massive, the left chela narrow 

 and elongated. 



ENGiEUS VICTORIENSIS, sp. n. (Pls, XVIII.-XX. figs. 27-29, 

 32 & 33.) 



The penultimate pleurobranch is more than double the size of 

 the last pleurobranch, the latter being greatly reduced in size. 



The exopodite of the third maxillipede is absent. 



The antennal scale ends in a well-developed terminal spine 

 and an inner lobe which is not markedly produced. 



First antenna (PI. XVIII. fig. 28) as in E.fossor. 



The chelae resemble those of E. qffinis, save that when one is 

 enlarged the propodite is not so broad and shoi-t, but is rather 

 more elongate in shape than in E. affinis. There is, as usual, 

 great variability in size, shape, and symmetry of the claws. 



The rostrum resembles essentially that of E. afUnis, but the 

 contour of the forehead (fig. 27) is a little steeper. 



The abdomen of both sexes is rather broader than in E. affi,nis, 



Jjengthoi specimen figured from tip of rostrum to end of telson, 

 65 mm. 



