Chilton. — Notes on somi New Zealand Crustacea. 131 



Elasmopus viridis (Haswell). 



Moera viridis Haswell, Proc. Linn. Soc. N.S.W., vol. 4. p. 333. 

 pi. 21. fig 1. 1879. M. incerta Chilton. Trans. n!z. Inst., 

 vol. 15, p. 83, pi. 3, fig. 3, 1883. Elasmopus viridis Stebbing, 

 Das Tierrcich Amphip., p. 445, 1906. 



Several specimens from Island Bay. Wellington (Farquhar coll.), were 

 in Mr. G. M. Thomson's collection. The species is known from Australia 

 also. 



When I described this species under the name Moera incerta I had 

 seen only specimens in which the second gnathopod had the palm straight 

 — i.e., the females. Since then I have seen a few in which the palm has 

 a slight central cavity, as described by Haswell and Stebbing, though the 

 cavity is by no means so deep as that shown in Haswell's figures ; I 

 think, therefore, that Stebbing is right in uniting the two species. These 

 specimens, are. I presume, males, and it is worthy of note that in this 

 species the females have the second gnathopods approximately as large 

 as those in the males, and. with the exception of the palm, of the same 

 general shape. 



Phronima novae-zeaiandiae Powell. 



Phronima novae-zealandiae Hutton. Index Faunae N.Z.. p. 256. 

 1904, 



This is a common pelagic form often washed up on the sandy beaches 

 of New Zealand. In June, 1911, two specimens were found at Sumner, 

 where Powell's type specimens were captured, and were sent on to me by 

 Professor Park, of Dunedin. In March, Mr. C. Barham Morris, of Oamaru, 

 sent me a mounted slide of a small Phronima. taken at Tomahawk Beach. 

 Dunedin. This specimen appeared to be identical with the one referred 

 to P. pacifica Streets by Stebbing in the "Challenger" Reports (p. 1350). 

 As P. pacifica had not been previously recorded from New Zealand, I wrote 

 to Mr. Morris asking if he had further specimens, and in reply was in- 

 formed that the small specimens were taken along with ordinary large 

 specimens which he considered to be P. novae-zealandiae. 



I find from the examination of one of the large specimens kindly 

 forwarded by him that this identification is quite correct, and it appears 

 almost certain, therefore, that the small specimens taken at the same 

 time are simply immature forms of P. novae-zealandiae. Most of them 

 measure about 4 mm. in length. The " Challenger " specimen, which was 

 taken in the Atlantic Ocean, off Sierra Leone, was " T 3 o in." in length, and 

 was therefore probably an immature form also. 



P. pacifica was originally described by Streets from the North Pacific 

 Ocean, and was said to be distinguished from P. sedentaria by the broadly 

 quadrate form of the carpus of the third pair of thoracic feet and by 

 having the carpus of the second gnathopods less produced anteriorly. It 

 was also pointed out that there was a striking resemblance of the smaller 

 specimens of P. pacifica and the corresponding parts of P. atlantica, which 

 is said to be the female of P. sedentaria. It appears, then, that there is 

 some suspicion that P. pacifica is not a distinct species, but perhaps an 

 immature stage. 



Unfortunately, I am unable to consult all the literature necessary on 

 this point, but the forms I have seen undoubtedly seem to be the young 

 of P. novae-zealandiae. and if not identical with P. pacifica are extremely 



