CHAS. CHILTON, AMPHIPODA. 



Waldeckia chevreuxi Stebbing. 



Waldeckia chevreuxi Stebbing, 1910 \ p. 572, pl. 47 B. 

 Waldeckia chevreuxi Chilton, 1912, p. 473. 



Locality. Forty-five miles W. S. W. of Cape Jaubert, N. W. Australia. One 

 female specimen. 



This specimen agrees well with the description given by Stebbing of the spe- 

 cimens obtained by the »Thetis» Expedition off Wata Mooli. Other specimens were 

 taken in Australian Seas by the F. I. S. »Endeavour» and are dealt with in the 

 report on the Amphipoda collected by that vessel. In 1912 I stated that the species 

 occurred in New Zealand, but I find that there is a slight difference in the terminal 

 uropoda and, in the meantime, at any råte, it will be best to consider the New Zea- 

 land specimens as a separate species. 



Distribution. Australian Seas. 



Plcityisclmopus m i ni bil is Stebbing. Fig. 1 a—f. 



Platyischnopus mirabilis Stebbing, 1906, p. 123; 1910, p. 635. 

 Platyischnopus mirabilis Barnard, 1916, p. 142. 



Locality. Forty-five miles W. S. W. of Cape Jaubert, N. W. Australia, 70 ft. 

 One female, about 6 mm long. 



This specimen agrees so closely in most respects with Stebbing's description 

 that it must be referred to his species, although there are a few points in which it 

 differs. The most important difference is in the pleon in which the second and third 

 pleon segments have the postero-lateral angles broadly rounded (fig. 1 b) while in 

 Stebbing's specimen these angles were distinctly acute. 



The head agrees general ly with the description given by Stebbing, the short 

 rostrum being distinctly marked off from its anterior margin, as shown in his figure. 

 The flagella, both primary and secondary, of the first antennae are imperfect in my 

 specimen, but the peduncles agree closely with the description given by Stebbing. 

 The second antenna shows three joints only in the flagellum, as described by Steb- 

 bing, but the end appears to be broken off. The mouth parts and gnathopoda do 

 not differ appreciably from the description though the gnathopoda bear fewer setae. 



In the third peraeopod the propod is slender, but fully as long as the much 

 broader carpus, the finger tapering, very acute and nearly half as long as the propod. 

 The arrangement of the setules agrees generally with Stebbing's description. 



The fourth and fifth peraeopods have the merus and carpus somewhat wider 

 in proportion than in Stebbing's specimen, but otherwise they agree with his figure. 



1 Names of authors, followed by a date, refer to the List of Refereuccs on p. 11. 



