214 



DISCOVERY REPORTS 



In May 1927 it was again abundant over the edge of the Continental Shelf to the 

 north-east of the island. 



Between South Georgia and the Falkland Islands, in February 1927, two specimens 

 were taken at St. 160, the station nearest South Georgia on the oceanic line, and then 

 curiously a single specimen was taken at St. WS 70 (250-100 m.) far across the Antarctic 

 Convergence at the same depth as the specimen of E.frigida was taken (see p. 203). The 

 temperature and salinity were as follows: 5-01° C, 34-16° / 00 at 100 m. and 4-07° C, 

 34-19%,, at 300 m. 



A complete record of the occurrence of E. superba is given in Appendix II. 



The distribution of the larval 1 stages is shown in Fig. 93. 



The depth distribution of larval stages as shown by the N 70 V nets may be tabulated 

 for cyrtopia and furcilia as follows. The numbers are too small to give more than a mere 

 indication that the larvae like the adults belong to the upper layers. 



Table XXX 

 The depth distribution o/E. superba cyrtopia and furcilia as s/iozvn by the N 70 V nets 



Of more interest is the seasonal distribution of the larvae which may be tabulated as 

 follows, the figures given being the actual total numbers taken at stations in nets of any 

 kind : 



Furcilia 



November. South Georgia (1926) 1 



December. „ ( J 926) 2 



January. „ (i9 2 7) 4 



February. Oceanic Stations (1926-7) 1 



March and April. South Georgia (1926) 152, 99, 



May. „ (i9 2 7) 26 



14, 7, 2, 2, 2, 1 



Cyrtopia 



1 Identification of the larval stages of closely allied species of southern Euphausiidae has been attended by 

 various difficulties, one of which is the extent of variation that is shown by individuals of one species at 

 similar stages of development, and another is the scanty attention that this subject has hitherto received. 

 Examples of different larvae have been submitted to Mr F. C. Fraser, who is preparing a monograph upon the 

 development of is. superba; he has kindly examined them and confirmed our identifications. 



