Chilton. — Some New Zealand Amphipoda. 229 



figure which Mr. Haswell gives much resembles Ischyrocerus {Podocerus) 

 anguipes Kroyer. Mr. Chilton supposes that the description given of the 

 pleopoda [uropoda] is the result of an oversight, and that the genus must 

 be cancelled in favour of Podocerus. It must, however, be observed that 

 Mr. Harwell's description of the maxillipeds is quite inconsistent with this 

 conclusion." In Das Tierreich Stebbing (1906, p. 648) retains the genus 

 Wyvillea Haswell, describing the maxillipeds as " exunguiculate, inner and 

 outer plates rudimentary, palp three-jointed." and to this genus he ascribes 

 two species — viz., W. longimana Haswell and W. haswelli (G. M. Thomson). 

 This description of the maxillipeds must, I think, be based on Haswell's 

 original description, which was apparently incorrect. In the specimens from 

 Lyttelton, which I feel sure are rightly referred to Haswell's species,* the 

 maxillipeds are normal and closely resemble the figure given by Sars for 

 Ischyrocerus anguipes. I have also been able to compare my specimens 

 with an Arctic one from Davis Strait sent to me by Dr. W. T. Caiman, 

 and have no hesitation in identifying them both as belonging to the one 

 species. I have already pointed out (1920, p. 6) that the other species, 

 Wyvillea haswelli (G. M. Thomson), is a species of Eurystheus. In this 

 the maxillipeds are also normal. Consequently the genus Wyvillea must 

 be finally dropped. 



The Lyttelton specimens are all rather small, the largest about 6 mm. 

 long ; but those examined by Kirk were very much larger, the second 

 gnathopod (now in my collection) of one specimen being itself 5 mm. long. 

 Stebbing gives the length as varying from 4 mm. to 15 mm. The Davis 

 Strait specimen that I have examined is about 12 mm. in length. 



The differences between the male and female, as pointed out by me 

 in 1884 from New Zealand specimens, closely agree with those described 

 and figured by Sars in 1894. The special characters of the second gnathopod 

 of the male are only acquired when the animal is fully adult, the immature 

 stages being at first similar to those of the female. I have one immature 

 male specimen in which the gnathopod closely resembles the figure given 

 by Sars of Ischyrocerus minutus Lilljeborg, a species which Stebbing con- 

 siders a synonym of /. anguipes Kroyer. 



Ischyrocerus anguipes has been recorded from South Africa by Barnard, 

 and is another example of an amphipod first described from northern seas 

 which proves to be also widely distributed in the Southern Hemisphere. 



Corophium crassicorne Bruz. 



Corophium contractuni Stimpson, 1855, P. Ac. Philad., vol. 7, p. 383. 

 C. contractuni G. M. Thomson, 1880, p. 6 ; 1881, p. 220, pi. 8, 

 fig. 9 : Thomson and Chilton, 1886, p. 142. C. crassicorne 

 Thomson and Chilton, 1886, p. 142 ; Sars, 1894, p. 615, pi. 220 ; 

 Stebbins, 1906, p. 690. ? C. bonellii Sars, 1894, p. 616, pi. 221, 

 fig. 1 ; Stebbing, 1906, p. 691 ; Walker, 1914, p. 559. 



In 1880 Mr. G. M. Thomson (1880, p. 6) obtained by the dredge in 

 Dunedin Harbour two specimens of a species of Corophium which he identi- 

 fied as C. contractuni Stimpson, a species described from Japan. Both 

 Mr. Thomson's specimens were stated to be adult females. In a paper 

 published in the following year (1881. p. 220) he repeated the observations 

 and description which he had given of his specimens, and added a figure 



» ■■-- ,—., — . .— — ... . . — ... . 



* Since this was printed specimens quite similar to those from Lyttelton have been 

 sent to me from Coogee, close to Port Jackson, New South Wales, the type locality for 

 Podocerus longimanus Haswell. 



