53 Transactions. 



almost as abundantly — I have it from Rona Bay, Wellington Harbour, and 

 also from Island Bay ; and Messrs. Lucas and Hodgkin obtained specimens 

 from Lake Waikare. Besides being found in fresh water, however, this 

 species is also able to live in salt water. I have on different occasions taken 

 it in great abundance in Otago Harbour in the ordinary sea- water, associated 

 with the usual marine forms. I have also taken it at Island Bay, Welling- 

 ton, in a pool near high-water mark, which would doubtless be filled with 

 sea-water at particularly high tides, though the water was only slightly 

 brackish at the time I collected the specimens. 



Mr. Stebbing considers Pherusa mistralis, Haswell, to be a synonym of 

 this species, and thinks that (Edicerus novi-zealandice, Dana, may perhaps 

 also belong to it. I have, however, specimens that I think undoubtedly 

 are to be referred to the latter species, and they belong to the (Edicerotidce, 

 and are appnrently the same as Carolobatea schneideri (Stebbing). I am 

 dealing with them in my report on the Crustacea collected by the recent 

 expedition to the subantarctic islands of New Zealand. 



Fam. Gammaeid.^. 

 Paracrangonyx compactus (Chilton). 



Grangonijx compactus, Chilton in N.Z. Journ. Sci., vol. i, p. 44, and Trans. 

 N.Z. Inst., vol. xiv, p. 177, pi. x, figs. 13-19 (1882). Crangonyx com- 

 pactus, Chilton in Trans. Linn. Soc. London, ser. 2, vol. vi, p. 220, pi. xx 

 (1894). Paracrangonyx compactus, Stebbing in " Das Tierreich Amphi- 

 poda," p. 369 (1906). 



This is a subterranean species found in the underground waters of Canter- 

 bury Plains, and has been fully described in my paper in the Trans. Linn. 

 Soc. London referred to above. In that paper I stated that the subter- 

 ranean crustaceans, though common in the shallow wells on the Plains, had 

 not hitherto been found in the artesian wells of Christchurch. Since then, 

 however, Mr. J. B. Mayne has brought me one or two specimens of this 

 species from an artesian at St. Albans, Christchurch. This artesian is sunk 

 only to the first water-bearing stratum, and probably is not more than 

 70 ft. deep. 



It was from the same artesian that the specimens of ParaleptampJiopus 

 suhterraneus already referred to were obtained, so that the two species are 

 associated in the underground waters at St. Albans, as they are in other 

 parts of the Canterbury Plains. 



Phreatogammarus fragilis (Chilton). 



Gammarus fragilis, Chilton in N.Z. Journ. Sci., vol. i, p. 44 (1882), and 

 Trans. N.Z. Inst., vol. xiv, p. 179, pi. ix, figs. 11-18. Gammarus fragilis, 

 Chilton in Trans. Linn. Soc. London, ser. 2, vol. vi, p. 227, pi. xxi, 

 figs. 1-25 (1894). Phreatogammarus fragilis, Stebbing in " Das Tierreich 

 Amphipoda," p. 454 (1906). 



This species is found in the underground waters of Canterbury Plains, 

 and has been already fully described in my paper in the Trans. Linn. Soc. 

 London quoted above. Its special characteristic is the possession of very 

 long anteunine, peraeopods, &c., and in this respect it resemble? several other 

 subterranean species from other parts of the world. 



