132 Transactions, 



close to it. This seems to make it more probable that P. novae-zeal andiae 

 is identical with P. sedentaria, as was suggested by Stebbing in the 

 " Challenger " Report. 



Order Isopoda. 

 Iais pubescens (Dana) var. longistylis var. nov. 



This variety differs from the typical form of the species in the longer 

 uropods, which are fully half as long as the pleon ; the peduncle is shorter 

 than the rami, and may be slightly dilated at the distal end ; the outer 

 ramus is almost or quite as long as the inner, but slightly more slender, 

 and has long setae, usually at the end only ; the inner ramus has long 

 setae both at the end and at a point some distance from the end. 



Hob. — On Sphaeroma quoyana, Marlborough Sounds and Hawke's Bay. 

 Also on specimens of the same species from Sydney Harbour. 



I have had specimens of this variety for several years. The dif- 

 ference between it and the typical form of the species is sometimes so 

 distinct that I have at times almost been inclined to give it a different 

 specific name, especially as it appears to be always associated with a 

 different species of Sphaeroma. I find, however, that Iais pubescens found 

 on Sphaeroma gigas shows considerable variation in the length of the 

 uropods ; I have one specimen from Lyttelton which has them much 

 longer than usual, and approaching the condition found in the variety 

 now described, while others from Port Chalmers have the uropods much 

 shorter, with the outer ramus very small and only about half as long as 

 the inner one. I can, moreover, find no constant points of difference 

 except in the uropoda, and therefore prefer to look upon the form found 

 on S. quoyana as merely a variety of the species. 



Haliacris neozelanica (Chilton). 



Munna neozelanica Chilton, Ann. & Mag. Nat. Hist., ser. 6, vol. 9, 

 p. 1, pi. 1 and 2, 1892. Haliacris neozelanica Chilton, Subant. 

 Islands N.Z., p. 650, 1909. 



A number of specimens that appear to belong to this species were taken 

 at Waikawa Bay, in Queen Charlotte Sound, near Picton, in July, 1910. 

 They were found in considerable numbers creeping on the under-surface 

 of stones in a fresh-water stream at a point a little above high-water mark, 

 the water at that place being at the time quite fresh, though it would be 

 probably more or less influenced by high tides. The animals were all very 

 small, and I have not been able to find one having the characteristic deve- 

 lopment of the first pair of legs of the adult male ; but, so far as can be 

 seen, the specimens are not structurally different from those gathered at 

 the type locality in Port Chalmers, though they have the body rather 

 darker in colour. 



One similar specimen was also taken at Portage, on Kenepuru Sound, 

 also at the mouth of a small stream, and in both cases specimens of 

 Phreatogammarus propinquus were taken at the same time and place. 

 Many years ago I collected one or two specimens in a similar situation at 

 Waitati Estuary, Otago, but they were so minute that an exact identifica- 

 tion at the time was impossible. 



Structurally these fresh-water or brackish-water specimens do not 

 seem to differ from the typically marine form, but there seems not much 



