CRUSTACEA DECAPODA— BORRADAILE. 97 



31. PoreellanojMgu'i'us edwardsi, Filhol, 1885. (? sp.). 



Porcellanopagurus edwardsi, Filhol, Bull. Soc. Philomath. Paris (7) IX, p. 48 ; Miss. He 

 Campbell, III, ii, p. 410, pi. XLIX, figs. 2-4 (188.5) ; Thomson, Trans. N.Z. Inst. XXXI, 

 p. 187 (1899); Chilton, Subant. Is. N. Zealand, XXVI, p. 610 (1909). 



The collection contains a single female specimen, taken at Station 96, off the north 

 end of New Zealand, of a species of the very interesting genus Porcellanopagurus. It 

 probably belongs to P. edwardsi, but its great chela differs considerably from that of 

 the male specimen described and figured by Chilton. The scales on the wrist are 

 coarser and less regular, the upper edge of the palm has a well-marked, though 

 irregular, crest of sharp granules or teeth, and along the lower edge there runs a 

 strong, regular line of fine granules, such as appears to be present in P. japonicus, 

 Balss, 1913. Very possibly these differences are sexual, and in any case the examina- 

 tion of a series of examples would be necessary before a new species could be 

 established for the form taken by the " Terra Nova." The specimen forms the subject 

 of a separate report (p. Ill below). 



Tribe BRACHYURA. 

 SuB-TRiBE BRACHYGNATHA. 



Super-family BEACHYEHYNCHA. 



Family POETUNIDAE. 



Sub-family POETUNINAE. 



32. Portunus corrugatus (Penn.), 1777. Fig. 9. 



Cancer corrugatus, Pennant, Brit. Zool. IV, p. 5, pi. V, fig. 9. 



Portunus corrugatus, Bell, Brit. Stalk-eyed Crust., p. 94 (1853); Miers, "Challenger" 

 Brachyura, p. 200 (1886). 



The collection contains a female specimen of this very widespread species, dredged 

 in moderately deep water off New Zealand. It is of small size (7 mm. long), but 

 closely resembles a rather larger British specimen with which I have compared 

 it, and also, as the accompanying figure shows, the representation given by 

 Bell. The only respect in which it differs from the British form is a greater 

 indistinctness of the regions of the carapace. It does not agree with the variety 

 suhcorrugatus, A. M.-Edw., 1861, from the Eed Sea in the featui-es in which 

 that variety is unlike the type. Specimens from Australia and Japan have the 

 regions of the carapace strongly marked, but show no constant difference from the 

 British form. 



Station 134. 



