94 K. LÖNNBERG. CONTRIBUTIONS TO THE FAUNA OF SOUTH GEORGIA. 



Notothenia macrocephala liiarinorata (Fischer) 1885. 



4 specimens cauglit in a deptli of 3 — 4 fathoms in Boiler Havbour, Cumberland Bay Jan. 1905. 

 3 specimens from tlie same locality, caught in a deptli of 6V2 m., the 3 of Jan. 1905. 



5 large specimens cauglit in the open sea about 40 kilometres of Cumberland Bay, the 22d of 

 March 1905. 



Several small, more or less nmtilated specimens taken o ut from birds and seals, oue shot from the 

 bill of a tern. 



The largest specimén measured 710 mm. in total length, or about 630 mm. 

 witliout caudal. As this and the other large specimens from the open sea sur- 

 pass in size the largest specimens hitherto known, some relative measurements have 

 been taken for the sake of comparison with those published before by the present 

 author (10). 



J ? ?" 



Total length witliout caudal 515 600 630 



Length of head in % °f tot. 1. witliout caudal . . . 29,5 28,6 27,7 

 lnterorbital width » >> » » >> ... 9,7 9,i 9,3 

 Length of mandible » » » » » ... 15, 1 14, 1 14,4 

 » » maxillary » » » » » ... 12,8 12,6 12,7 

 Distauce from snout to first dorsal in "/„ of tot. 1. witli- 

 out caudal 30,6 28, 1 27,7 



Distance from snout to anal ti 11 in % of tot. 1. witliout 



caudal 55, 1 57,8 53,9 



Length of ventral in "/o of tot. 1. witliout caudal . . . 13,5 14,3 13,3 



Deptli of caudal peduncle » » » . . . 7,3 6,6 6,5 



Diameter of eye in % » » » » . . . 4,6 4,0 3,8. 



From this is apparent that the relative measurements expressing the length of 

 the ventrals, the depth of the caudal peduncle and the diameter of the eye conti- 

 nually decrease with age. 



The relative measurements expressing the length of the head, of the mandible 

 and the maxillary are not quite so large as those derived from the largest specimén 

 of the former collection (10) but agree better with those of the middle sized speci- 

 mens from 1902. This may no doubt find an explanation in the fact that the larg- 

 est specimén from the collection of 1902 had been badTy bitten in the back so that 

 part of the dorsal etc. had been cut away. This wound had healed, but probably 

 this had kept back the growth of the fish to some extent, so that the head had 

 grown comparatively more than the body. 



The large females caught in the låter part of March had the ovaries swelled 

 to some extent, and the diameter of the eggs, in a preserved state, varied in differ- 

 ent specimens between 27, and nearly 3 mm. This appears to indicate that the 

 spawning season could not be much remote. The smaller specimens caught in May 

 1902, »showed genital organs beginning to develop» (10). Perhaps these were not 

 yet mature, or it may be that the young specimens do not spawn at the same time 

 of the year as the large ones. 



