30 EINAR LÖNNBERG, (Schwed. Südi)olar-E\p. 



5. Notothenia mizops GÜNTHER var. nudifrons. 



(PI. I fig. 2.) 



I specimen from stat. 17 near Shag Rocks (W. of South Georgia, depth 160 

 m., gravel and sand, temperature + 2,05' C. 19th of April 1902. 



Many specimens from stat. 20, Antarctic Bay (just outside the glacier). South 

 Georgia, depth 250 m., small stones. 6th of May 1902. 



8 specimens from stat. 22, Cumberland Bay, South Georgia, depth 75 m. clay 

 and some algœ, temperature + 1,5 C. 14th of May 1902. 



4 specimens from stat. 25, outside Boiler Harbour, Cumberland Bay, South Geor- 

 gia, depth 52 — 24 m., grey clay with some alga;. 23d of May 1902. 



5 specimens from stat. 26, outside Boiler Harbour, Cumberland Bay, South Geor- 

 gia, depth 30 m., stones and algae. 24th of May 1902. 



5 specimens from stat. 28, Boiler Harbour, Cumberland Bay, South Georgia, 

 depth 12 — 15 m., sand and alga;. 24th of May 1902. 



I specimen from stat. 32, South-fjord, Cumberland Bay, South Georgia, depth 

 195 m., clay with stones, temperature -f 1,45 C. 29th of May 1902. 



Many specimens caught in a large net, sunk to a depth of 20 m.. Boiler Har- 

 bour, Cumberland Bay, South Georgia, clay and algïe. 30th of May 1902. 



I was in great doubt concerning this fish, because its entire occipital and inter- 

 orbital regions are scaleless in adult as well as in young specimens,' while GÜNTHER 

 in the original description says:= "The crown of the head is covered with minute 

 scales to between the eyes, the snout and praeorbital being scaleless." In his syn- 

 opsis of the species of Notothenia BoULENGER 3 also places N. mizops in a group 

 with the "interorbital region scaly". But the last mentioned author has now been 

 so kind as to compare a couple of specimens from South Georgia with the type 

 specimens of Notothenia mizops of corresponding size and then found that both be- 

 long to one and the same species, as he kindly has communicated to me in a letter- 

 I have therefore only recorded the fish from South Georgia as a bald-headed form 

 of Notothenia mizops with which it agrees with the exception of its not scaly crown 

 of head. 



The following table of comparative measurements shows the direction of the 

 development of some organs of this fish. 



" Only in a single specimen I have founJ some few scattered scales on the crown. 



' "Challenger"' Reports: Zoology. Vol. I. Shore fishes p. 16. London 18S0. 



3 Report on the Collections of the "Southern Cross". Pisces p. 183. London 1902. 



