REPORT ON THE AMPHIPODA. 



1(339 



1883. Mayer, Paul, und Giesbrecht, Wilhelm. 



Zoologischer Jahresbericht fur 1882. II. Abtheilung. Leipzig, 1883. Crustacea, 

 pp. 4-63. 



1884. Giesbrecht, W. 



Zoologischer Jahresbericht fur 1883. II. Abtheilung. Leipzig, 1884. Crustacea, 

 pp. 9-50. 



1884. Mobius, Karl. 



Nachtragzu dem im Jahre 1873 erschienenen Verzeichniss der wirbellosen Thiere 

 der Ostsee. In 4. Ber. Comm. Unt. d. Meere Kiel. 7.-11. Jahrg. 3. Abth. 

 pp. 61-70. 



The Gammaridee mentioned are (on p. 68), Pontoporeia furcigera, Bruz., " 7 ru. tief, todtes 

 Seegras"; Bathyporeia pilosa, Lindstroni ; "Dexamine spinosa, Montag."; Cheirocratus brevi- 

 cornis, Hoek, "10-14 m. tief"; and (on p. 69), Protomedeia pilosa, Zadd.; Mlcrodeutopus 

 gryllotalpa, Costa, "in geringen Tiefen zwisehen Miesmuscheln " ; Amphitltoe podoceroides, 

 Rathke ; Podocerus falcatus, Mont., "stoller Grand, 18 m. tief." 



1884. Thomson, G. M. 



Descriptions of new Crustaceans. [Head before the Otago Institute, 31st 

 October, 1882. ] Transactions and Proceedings of the New Zealand Institute, 1883. 

 Vol. XVI. Issued May, 1884. Wellington, pp. 234-240, Pis. XIL, XIII. 



" Allorchestes recens, n. sp. PI. xiii., figs. 2-5," is described, and of the locality Mr. Thomson 

 says, " Numerous specimens of this species were sent me from Wellington by Mr. J. C. 

 Gully, who obtained them in a small stream into which several drains ran." 



" Corophium excavation, n. sp., PI. xii., figs. 1-8," is described, from "Brighton Creek (salt 

 water), near Dunedin," and the remark added, "This species is very distinct from any 

 hitherto described, the form of the meros [third joint] of the 2nd gnathopod being quite 

 remarkable ; a tendency towards a similar development of structure occurs apparently in 

 C. longieorne, which is, however, a very different species in many respects." The third 

 uropods are represented with two rami, "internal ramus very minute." This feature is 

 inconsistent with the definition of the genus Corophium by Spence Bate and of the family 

 Corophidse by Boeck, according to which the third uropods are uniramous. 



A definition of the genus Oxycephalus is followed by descriptions of the two sexes of " Oxy- 

 cephaly edwardsii, n. sp. Plate xii., figs. 14-21 ; pi. xiii., fig. 1." Of this species Mr. 

 Thomson says, " 1 found numerous individuals washed up on the Ocean Beach near Dunedin 

 on two different occasions : they appear to come ashore in fine clear calm weather." The 

 approximation of this species to the form designated in this Report as Oxycephalus clausi, 

 Bovallius, has been already noticed (pp. 1">.S2, 1585). Mr. Thomson says of the maxillipeds, 

 that they "are of very simple structure, consisting. each of an oval smooth plate, without 

 any trace of hairs or teeth," but the specimens which he has very kindly sent me show that 



