426 



PROCEEDINGS OF THE NATIONAL MUSEUM. 



VOL. 50. 



of this genus found in the region under discussion are peculiar to it 

 and very different from even those of South Georgia. Two species 

 are credited by Regan, however, with a circumpolar distribution, but 

 this view has not been accepted in this paper. (See under N. cornu- 

 cola and N. Tnacrocephala.) 



The present collection is probably the largest and most abundant 

 in individuals of any which has been made so far, and the oppor- 

 tunity was seized to delimit the species as carefully as possible. The 

 results may be seen in part in the following table showing the species 

 recognized here as compared with those considered valid by previous 

 writers. Seven were given by Dollo, 10 by Regan, and 15 are here 

 listed in the present paper as peculiar to the region. 



Present identification. 

 = tessellata Richardson. 

 = sima Richardson. 

 = cornucola Richardson. 

 = longicauda, new species. 

 = elegans Giinther. 

 = longipes Steindachner. 

 = (tessellata). 

 = viacrocephala Giinther. 

 = trigramma Regan. 

 = canina Smitt. 

 = ramsayi Regan. 

 = (longipes Steindachner). 



brevicauda Lonnberg. 



gilberti, new species. 



latifrons, new species. 



sqiiamiceps Peters. 



jordani, new species. 



The monograph of the Nototheniiformes by Regan ^ constitutes 

 a marked advance on what was previously known concernmg the 

 genus NototJienia, but the identification of species without material 

 for comparison is left very difficult, and the recognition of new 

 species still more so. The present collection has been w^orked over 

 with a view to presenting a clear defuiition of the species, the range 

 of variation of each character, and the correct determination of the 

 synonymy, including as far as possible locality records. It is to be 

 regretted that certain species, which are not included in the present 

 collection, still rest on descriptions which are entirely inadequate 

 and in some cases so similarly constructed as to render the species 

 relationship doubtful. For the literature and bibliography the paper 



1 Dollo, Voyage du S. Y. Belgica (1897-1899) Zoologie, Anvers, 1904, p.79 (Summary of Literature). 



2 Regan, The Antarctic Fishes of the Scottish National Antarctic Expedition, Transactions of the Royal 

 Society of Edinburgh, vol. 49, pt. 2 (No. 2), 1913, p. 284, plates. 



•Idem. 



