54 NOTES ON TASMANIAN CRrSTACEA, ETC. 



of short spines. The telson is short, rounded and toothed 

 round the end. 



Large specimens are about 1 J inches in length, the average 

 length being about one inch. 



The colour is grayish, becoming brown in spirit specimens. 



I discovered these remarkable shrimps in a pool near the 

 top of Mount, Wellington, that is, at an elevation of over 

 4,C00 feet. The pool had deep crevices among the boulders, 

 and in these dark recesses large specimens seemed to be 

 abundant, but they were shy and difficult to capture. Crumbs, 

 etc., dropped on to the sloping rock bottom of the pool at- 

 tracted them however, and I was able to secure several speci- 

 mens, apparently all females. This was in January. At my 

 request, however, Mr. L. Rodway visited the spot on the 24th 

 May. The ground was then covered with snow and the pools 

 all frozen over. After breaking the ice, he put in a small net 

 baited like a crayfish net, and as the result of several hours' 

 patient waiting in an extremely cold situation he succeeded in 

 securing a large series of specimens of both sexes and of con- 

 siderable range of size. I wish to take this opportunity of 

 thanking Mr. Kodway for his kindness to me in carrying out 

 my request with so much enthusiasm. 



I believe this form to be the most interesting Crustacean 

 "which has been discovered for very many years. 



Tribe Isopoda. 

 Fam. Oniscidde. 

 Sub-Fam. Oniscince. 

 8. Oniscus jjiuidatus, mihi (PL I. figs. 6-13). 



This terrestriallsopod, so common among fallen leaves, etc., 

 in the New Zealand bush, seems to be equally common in similar 

 situations in Tasmania. I obtained some specimens along with 

 Talitrus sylvaticus on the slopes of Mount Wellington, and re- 

 ceived a number also from Mr. Morton, collected from the same 

 locality. My original description in the Transactions of' the 

 New Zealand Institute, vol. xi., is very meagre, and the 

 figure most unsatisfactory ; I therefore take this opportunity 

 of amplifying both. 



The length of the body is more than twice its breadth, the 

 lateral margins of the segments are rounded, and— except 

 the last — hardly produced backwards. The thoracic segments 

 are unequal in length, the first being the longest, then dimin- 

 ishing to the fifth, which is the smallest, the two last being 

 somewhat longer. The abdomen is about two-thirds as broad 

 as the thorax, and rather more than one- third as long. 



