120 MR. G. W. SMITH AND DR. E. H. J. SCHUSTER OX 



The antennal scale is rounded at the end and carries no terminal 

 spine (PI. XY. figs. 14 & 15). 



The inner flagellum of the first antenna is slenderer than the 

 outer one and about two-thirds its length. 



Tubercles on propodite and ischiopodite of chela very incon- 

 spicuous. 



The great chela always has a row of tubercles on the upper 

 border of the propodite, the lower border being generally smooth 

 and rounded. There is one prominent tooth on the inner surface 

 of the dactylopodite, while there are three teeth on the lower part 

 of the pincer. In some specimens the chelas are equal in size and 

 sliape, in othel^s one chela is more slender and hairy, and with the 

 pincer more delicate and elongated. 



In the female there is a pair of sperm-receptacles with con- 

 spicuous openings on penultimate segment (PI. XY. fig. 13). 



The eyes are small, and the rostrum is shoi't with rather 

 pi'ominent keels. Contour of forehead shown in fig. 1 2 (PI. XIY.). 



The thorax is laterally compressed and highly arched. It is 

 fairly free from hairs, but the abdomen is rather hairy. 



The tail-fan is rounded without conspicuous spines or ridges. 



Colour. Ground-colour ivory with blue and red blotches 

 iri'egularly disposed. 



Length 38 mm. 



Locality. Magnet Mine, West Coast of Tasmania. Also 

 reported to occur on the southern ranges. Confined to Tasmania. 



Ljocal Variety. Some specimens obtained from burrows near 

 Muddy Creek, Bridport, on the north coast of Tasmania, while 

 agreeing essentially with the above description, show certain 

 variations. The whole body and limbs are more hairy, and this 

 is especially marked on the chelse. The propodites of the great 

 chelse are slightly tuberculated on their lower as well as on the 

 upper border, and the chelse tend to be slightly moi-e elongated 

 than in the type specimens. The keels on the rostrum are 

 slightly more pronounced, and the eyes are a little larger. 



Eng^us affixis, sp. n. (Pis. XYII. & XYIII. figs. 23-26.) 



All the pleurobranchs are of approximately the same size, the 

 posterior pleurobranch being well developed. 



The exopodite of the third maxillipede is absent. 



Th,e antennal scale ends in a well -developed terminal spine and 

 an inner lobe which is not markedly produced (PI. XYII. fig. 25). 



First antenna is formed as in E.fossor. 



There are two conspicuous rows of tubercles on the inner 

 surface of the carpopodite of the great chela, and a row of marked 

 tubercles on the meropodite. There is a row of tubercles on the 

 upper border of the propodite, the lower border being smooth 

 and rounded. 



There is, as usual, gi-eat variability in the size and shape of the 

 chelfe, in some specimens the two chelfe being similar and equal 

 in size, while in others one chela, either the right or left, is 



