376 Di". 0. Chilton on the 



of the clypeus than it is in A. geniculatus*, while in the 

 latter species the chitinous disc bears a sharp transverse 

 ridge on each side of the central peg. 



In Shnulium austeni the egg-burster is very small and 

 inconspicuous, and appears to have no membranous area 

 surrounding it, but this may not be the case throughout 

 the genus. I hatched out in 1915 a number of young 

 larvae of S. angustipes, and, though these were not kept, my 

 recollection of them is that they had egg-bursters as well 

 developed as those of the Culicidfe. If this is so, it may be 

 due to difterences in breeding-habits between the two 

 species. 



The subject is one of considerable interest and will 

 certainly bear further investigation. 



XXXV. — The Amphipod Orchestia tucuranna, Fritz Aliiller, 

 of Brazil^ redescriied from Aeio Zealand Specimens. By 

 Chas. Chilton, M.A., D.Sc, LL.D., C.M.Z.S., Hon. 

 Memb. Eoy. See. N.S.W. 



On July 11th, 1910, 1 collected near the mouth of the Waitohi 

 stream at Picton, New Zealand, several specimens of a sand- 

 liopper that I thought at the time would probably be Orchestia 

 chiliensis, Milne-Edwards, which is common on the neigh- 

 bouring shores of Queen Charlotte Sound and elsewhere on 

 the NeAv Zealand coasts. On examination, however, I found 

 that, though two of the specimens were 0. chilietisis, the 

 others differed considerably from 0. chiliensis in the shape 

 of the second gnathopods of the male. One male specimen 

 of these was dissected and mounted and to some extent 

 examined, and was provisionally named O. redmani^ sp. n., 

 in my MIS. in honour of Dr. Redman of Picton, to whom I 

 am indebted for much assistance. 1 felt sure that I had seen 

 somewhere a drawing of a gnathopod similar to the second 

 gnathopod of this specimen, but at the time could not ascer- 

 tain where this w^as ; consequently the specimens were laid 

 aside for a more favourable opportunity. Recently, in 

 looking up Stebbing's paper in the Trans. Linn. See. vol. vii. 

 p. 395, 1909, for another purpose, my attention was drawn 

 to his figures of 0. suJensoni (pi. xxx. C), owing to the 



• This character would appear to he variahle, since the egg-burster is 

 shown nearer the middle of the head in Scott-Macfie's figure than it 

 appeared to be in the ca&t sluus of the same species -which I examined. 



