CRUSTACEA. 



II.-CUMACEA. 



By W. T. Calman, D.Sc. 

 (1 Plate.) 



The collection of Cwnacca obtained Ijy the ' Discovery ' is a very small one. In 

 addition to a species collected at the Auckland Islands and omitted from the present 

 report as not belonging to the strictly Antarctic fauna, it comprises only four species, 

 two of which are represented by solitary specimens. 



No Cuinacea have hitherto been recorded from within the Antarctic Circle. In 

 the sub-Antarctic region five species were got by the ' Challenger ' at Kerguelen and 

 descriljed by Prof. Sars, and Dr. Zimnier has more recently described two species from 

 .South Georgia and four from Tierra del Fuego. I am unable to identify any of these 

 species in the present collection. 



On the other hand, I have regarded one of the forms got Ijy the ' Discovery ' as a 

 variety of a species known hitherto from the North Atlantic and the Mediterranean. 

 It is necessary to add, however, that I do not think much importance can be attached 

 to this circumstance from the point of view of zoo-geography. In this connection I 

 would refer to the emphatic statement of Dr. Giesbrecht, already quoted with approval 

 l)y Dr. H. J. Hansen : — " Unsere Kenntuisse von der Microfauua der Kiistcn 

 aussereuropaischen Meere siud kaum der Rede werth." My own work leads mo to 

 believe that the Cuinacea will, in the future, illustrate most admiral >ly the opinion of 

 these two distinguished carcinologists. The species in c[uestion, Campylasjns verrucom, 

 was described by Prof. Sars in 1863, and, until 1901, it was only known from 

 Norwegian seas. More recently it has been obtained by Mr. E. W. L. Holt off the 

 West of Ireland, and by Dr. Lo Bianco in the Mediterranean, near Capri. There can 

 be little doubt that, with appropriate methods of collecting, its known range might be 

 vastly increased, and it might even be found to be continuous with that of the variety 

 now described. 



Leucon australis. 

 (Text-figs. 1-.3.) 



Description of Oviyerous female. — Total length, 3 "5 mm. Carapace about two- 

 sevenths of total length, compressed, the dorsal crest closely serrated throughout its 

 whole length. Pseudorostrum horizontal or very slightly upturned, acute, a little less 

 than one-fourth of total length of carapace. Antennal notch widely open, occupying 

 the whole of antcro-lateral margin. Antcro-latcral angle [ironnncnt, triangular, 



