260 Transactions. — Zoology. 



specimen). The external maxillipedes, as in H. spinifrons, 

 are very long, and reach considerably beyond the extremity of 

 the scales of the outer antenna. The legs of the 1st pair are 

 moderately stout, and also reach beyond the extremity of the 

 antennal scales ; those of the 2nd pair reach to the end of the 

 outer maxillipedes ; the next three pairs are shorter. The 

 abdomen narrows very suddenly at the last joint, and is bent 

 completely round. The central caudal lamella has two spines 

 on each side of the median line. 

 Length, about lin. 



Sub-order. Amphipoda. 



5. Coropliliaii contractmn, Stimpson. Plate XIII., fig. 2. 



When collecting on the shores of Auckland Harbour, be- 

 tween tide-marks, I picked up a small tube about 6nun. {\i\\.) 

 long, closed at one end and furnished with a hinged lid at the 

 other end, which at the time I took to be the case of a marine 

 caddis-worm. The tube was made of a very tough material, 

 and was covered over with fragments of corallines ; so that, 

 had I not seen it moving, I should have passed it by without 

 notice. On opening it the tube was found to contam a small 

 specimen of Corophiinn contractum ; but whether the crus- 

 tacean constructed the tube, or, which is more likely, had 

 merely found it empty and had taken refuge in it, could not 

 be decided. Along with the amphipod was a small copepod 

 (Arpactiais) . 



22. Allorchcstes neo-zealanica, Dana. Plate XIII., fig. 3. 



Foiind under stones between tide-marks in Auckland Har- 

 bour. The figure of this species in the British Museum Cata- 

 logue (pi. vi., fig. 3) is very poor and inadequate. The relative 

 leiigths of the antennae in this and other species of the Orches- 

 tldcB appear to constitute characters of trifling importance from 

 a specific point of view. In a single specimen dissected by me 

 the peduncle of the anterior antenna is not nearly as long as 

 its ilagellum, and the latter organ is furnished with simple 

 sette, which are more than half as long as the joints which 

 bear them. The posterior antennce are very short, not ex- 

 ceeding the anterior in length. A very distinctive feature in 

 the species is the form of the gnathopoda of the 2nd pair. 

 The lower surface of the carpus (the margin of which is setose 

 all round) is produced into a scoop-like projection, while that 

 of the 1st pair is only slightly produced below. The meros of 

 the 2nd pair is also produced below, but not into a scoop. 



30. Talorchestla tinnida, mihi. Plate XIII., figs. 4-8. 



My original description of this species is reproduced by Mr. 

 Stebbing in tlie " Proceedings of the Geological Society " (Lon- 



