122 



DISCOVERY REPORTS 



M. bargmannae differs from both M. atlantica and M. kochii and the other new species M. delsmani 

 described below in that the tip of the nectosac approaches much nearer to the apex of the whole 

 nectophore and also in that the convex longitudinal folds into which the nectophore is thrown on 

 contraction of the nectosac are not surmounted by crest-like ridges. Another point to note is that 

 towards the ostium of the nectophore the two lateral folds almost meet, so that the dorsal fold is most 

 apparent in the apical two-thirds of its course. The length of the somatocyst is about half the distance 

 between the tip of the nectosac and the tip of the hydroecium. In well-fed specimens such as that 

 illustrated in Text-fig. 63 A the somatocyst is sausage-shaped and its base projects ventrally over the 

 top of the hydroecium. In this state it contains much oil. When not distended with oil, its diameter 

 may measure only one-third or less, as shown in Text-fig. 63 C. The hydroecium is shallower than 

 that of M. kochii, but not as shallow as that of M. delsmani. 



Records of capture of Muggiaea bargmannae sp.n. 



Examination of ' Discovery II ' hauls on both the o° and 30 lines of stations showed that M. barg- 

 mannae occurred only to the southward of the Antarctic convergence. Of the other six records five are 

 from the Antarctic, but Station 1772 was made in lat. 36 S., and the haul that contained one young 

 specimen was made from 520 to 250 m. This record should be treated with reserve. The most 

 southerly record I have at present is at 'William Scoresby' St. WS 551, in 68° 17^' S., where it was 



