19G PROFESSOR CHARLES CHILTON ON THE 



These specimens resemble those examined by me from Campbell Island, and differ 

 from the description of the genus as given by STEBBING in Das Tierreich Amphipoda 

 in having the eye present and formed of many facets, though it is pale in colour in the 

 smaller specimen. 



The species is widely distributed in Antarctic and sub-Antarctic seas. 



Genus LEUCOTHOE Leach, 1813-14. 

 Leucothoe spinicarpa (Abildgaard). 



Gammarus spiniearpus Abildgaard, 1789, in 0. F. Muller, Zool. Dan., 



3rd ed., vol. iii. p. 66, pi. cxix. figs. 1-4. 

 Leucothoe antarciica Pfeffer, 1888, p. 13, pi. ii. fig. 4. 

 spinicarpa Stebbing, 190G, p. 165. 



Walker, 1907, p. 18. 

 ,, eommensalia Haswell, 1880, p. 261, pi. x. fig. 3. 



Stebbing, 1906, p. 166. 

 1910A, p. 580 and p. 630. 



South Orkneys, Scotia Bay, Station 325; 9-10 fathoms. April 1903. One 

 specimen, 8 mm. long. 



I have been able to compare this specimen with some obtained at South Victoria 

 Land by the Nimrod, and with specimens from Plymouth, England, and I agree with 

 Mr WALKER that there is no appreciable difference between them and the European 

 species. The South Orkneys specimen has the conical process on the propod at the base 

 of the finger a little more obtuse than in the others, but in all other points they agree. 



With regard to L. commensalis Haswell, Mr STEBBING says : " It is perhaps only 

 a matter of taste or convenience whether this should be taken as a distinct species or 

 as a variety of L. spinicarpa Abildg." In my South Orkneys specimen the propod 

 of the second gnathopod contracts a little more towards the finger hinge than is shown 

 in SARS' figure of the European form, as it does in the Australian specimens examined 

 by Mr STEBBING ; on the other hand, the tuberculation of the palm is practically 

 intermediate between that shown by SARS and by HARWELL, and the resemblance 

 throughout is so very close that 1 see no good object in retaining a different name for 

 the Australian specimens. 



Three other species are at present included in the list of Australian Crustacea, viz. 

 L. brevidigitata Miers, L. diemenensis Haswell, and L. gracilis Haswell ; but, as 

 STEBBING points out, it is probable that they should all be included in L. spinicarpa, 

 though, as yet, I have not been able to examine specimens. I have, however, examined 

 the type of L. antarctica Pfeffer from the Hamburg Museum, and find that it also 

 belongs to this cosmopolitan species. 



I may take this opportunity of stating that I have recently (1912, p. 129) united 

 L. tridens Stebbing, obtained in New Zealand waters by the Challenger, with the 



(ROY. soc. EDIN. TRANS., VOL. XLVIII., 478.) 



