252 Transactions. — Zoology, 



setae, ending posteriorly in a sharp point followed by a small concave 

 indentation ; portion between the bases of the last pleopoda slightly convex. 

 Last pleopoda with the peduncle short, broadest at distal end, inner ramus 

 larger than the outer, both narrowing distally and supplied with tufts of 

 long fine setae. Length of body about i inch. 



Hab. Lyttelton Harbour. 



I have only a single specimen, the body of which is unfortunately much 

 crushed. I am therefore unable to describe the shape of the body, and I 

 cannot determine whether the head is produced into a rostrum or not. 

 Judging from the analogy of the Australian species described by Mr. 

 Haswell, the specimen is probably a female. 



AMPHIPODA. 



Genus Cyamus, Lamarck. 



(Bate's and Westwood's " British Sessile-eyed Crustacea," vol. ii., p. 80.) 



The following is the generic character as given by Bate and West- 

 wood : — 



"Head and first segment of the body fused into a pear-shaped mass. 

 Eyes small and vertical. Segments of the pereion with the sides horizon- 

 tally dilated ; the legs attached to the postero-lateral margins ; five pairs of 

 strongly cheliform legs, wanting in the third and fourth segments, which 

 are furnished with two pairs of branchial appendages, long and filiform. 

 Pleon rudimental." 



Oijamus ceti, Martens, I.e., p. 85. 



Specific description : — " Body depressed, elliptical, segments gaping at 

 the sides (male narrower?). Third and fourth segments of the body with 

 one long branchia on each side ; armed at the base with two short append- 

 ages ; second pair of hands armed beneath with two obtuse teeth, between 

 which is a lunate incision. Length nearly half an inch." 



I received three specimens of this species from Professor Julius von Haast. 

 In answer to my question as to the name of the whale on which they were 

 found, he writes : — " The parasitic Crustacea were found on Euphysetes 

 potsii, which, as it appears now from careful examination of further speci- 

 mens, is identical with Viagia hremceps of the northern hemisphere." With 

 regard to its occurrence in European seas, Bate and Westwood say, — " We 

 have no precise details of the locality and notice of capture of this species, 

 beyond the general statement of its being found on the whale in British 

 seas." 



Of the three specimens which Professor Haast kindly handed over 

 to me, two appear to be males, one -^ inch in length of body, the 

 other i§. 



