210 Transactions. — Zoology. 



Art. XXII. — Notes on some Crustacea from Macquarie 



Island. 



By George M. Thomson, F.L.S. 



[Read before the Otago Institute, 13th November, 1894.] 



Plate XIV. 



After his return from his eventful trip to Macquarie Island, 

 in May of the present year, the small collection of Crustacea 

 made on the island by Mr. A. Hamilton was handed to me by 

 Professor Parker for examination. This consisted of two or 

 three bottles containing littoral species, one small bottle of 

 fresh-water specimens, and portion of the claw of a large 

 crab which 1 have not been able to identify. The chief 

 interest naturally attaches to the fresh-water fauna. Mr. 

 Hamilton's collection included only several specimens of a 

 small Ghydorus, which is apparently identical with the New 

 Zealand C. minutus, mihi, and two imperfectly preserved 

 female specimens of a Copepod belonging to the Galanidce, 

 and for which I propose to provisionally form the new r genus 

 Guernea. The only member of this family hitherto described 

 from New Zealand is Boeckella (Boeckia) triarticulata, mihi, 

 from which this species is very distinct. 



Order DECAPOD A. 

 Tribe Brachyura. 



1. Halicarcinus planatus, Fabr. 



Three female specimens, all more or less mutilated, oc- 

 curred in the collection. This species is very common, and is 

 widely distributed throughout the whole of the antarctic and 

 south Australasian region. 



Order ISOPODA. 

 Family Sph^romid^;. 



2. Sphaeroma gigas, Leach. 



This well-marked species was numerously represented. It 

 is abundant throughout the antarctic region. 



Family Asellid^;. 



3. Iais pubescens, Dana. (For the synonymy of this species 

 see Trans. N.Z. Inst., vol. xxiv., p. 266.) 



This species was originally found by Dana in Nassau Bay, 

 Tierra del Fuego, as a parasite or commensalist on Sphceroma 

 lanceolata. It has been found along with S. gigas at Ker- 



