GKUSTACEA. 



II -CUMACEA. 



BY W. T. CALMAN, D.Sc. 

 (1 Plate.) 



THE collection of Cumacea obtained by 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 Cumacea have hitherto been recorded from within the Antarctic Circle. In 

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

 described by Prof. Sars, and Dr. Zimmer 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 by 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 

 by Dr. H. J. Hansen : " Unsere Kenntnisse vou der Microfauna der Kiisten 

 aussereuropaischen Meere sind kaum der Rede werth." My own work leads me to 

 believe that the Cumacea will, in the future, illustrate most admirably the opinion of 

 these two distinguished carcinologists. The species in question, Campylaspis verrucoxa, 

 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 AUSTEALIS. 



(Text-figs. 1-3.) 



Description of Ovigerous 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 antero-lateral margin. Antero-lateral angle prominent, triangular, 



