1356 THE VOYAGE OF H.M.S. CHALLENGER. 



152° 56' W.; surface net; surface temperature, 79°. One specimen, male, mounted in 

 Canada balsam. 



Remarks. — The specific name refers to the delicacy of structure displayed by the 

 specimen, the fourth joint of the third perseopods in especial not having the squareness 

 common in the males of this genus. 



Phronima novw-zealandiee (?), Powell (PL CLXI., B.). 



1875. Phronima novserzealandiee,, Powell, Trans, and Proc. N. Z. Inst., 1874, voL vii. p. 294, 



pi. xxi. rigs. 1, 2. 



1876. „ ,, Miers, CataL Stalk- and Sessile-eyed Crust. New Zealand, 



p. 129. 

 1886. ,, neo-zelanica, Thomson and Chilton, Trans. N. Z. Inst., vol. xviii. p. 150. 



The specimen which I take to represent Mr. Powell's species has the postero-lateral 

 angles of the first three pleon-segments strongly produced. The first and second joints 

 of the first perseopods are not apically produced. The fourth perseopods agree closely 

 with those figured for Phronima megalodous, PI. CLXII., A. The third perseopods do 

 not differ to any great extent from those figured on PI. CLXII., B, for Phronima seden- 

 taria, although the front tooth of the fourth joint is less elongated ; but, judging by 

 specimens kindly sent me from New Zealand by Mr. G. M. Thomson, that, as might 

 be expected, is not a specific characteristic ; moreover, a large specimen taken south of 

 Australia, March 9 and 10, 1874, and presumably belonging to this species, has the 

 front tooth in question elongate. The peduncles and rami of the first uropods are 

 the longest, and respectively nearly reach back as far as those of the third uropods ; 

 the inner and the outer ramus in each pair are equal, and have the adjacent margins 

 pectinate ; the rami of the second pair are shorter than those of the third, and reach 

 just beyond the peduncles of the first pair. The telson is semicircular. 



Length, one inch. 



Locality. — Station 158, March 7, 1874 ; in the Southern Ocean ; lat. 50° 1' S., 

 long. 123° 4' E.; depth, 1800 fathoms; bottom temperature, 33° - 5 ; surface tempera- 

 ture, 45°. One specimen, female, containing eggs. 



Remarks. — The interest of the specimen does not so much depend on the question 

 of its right to this or that specific name, as on the latitude from which it comes. If 

 it actually came from the depth named, it must be capable of bearing a very low 

 temperature, and it will be observed that even the surface temperature of the station 

 is not very high. The identity, however, of Phronima novse-zealandise with Phronima 

 oorneensis, Spence Bate, and of both with Phronima sedentaria, seems well within 

 the bounds of probability. 



