Scliizopodii culled I'll in the Antarctic Uci/inn. W 



bctwcou that size and 27 nun. arc most obviously ni;ittii-.s ol' 

 growtli. The types of E. anstra'is only cliU'or from those 

 oi E. Murrayi in being more or less buillv diunaged. 



As between the actual condition of A'. Murrmji and the 

 description and figures of E. sitperba (which are correct) the 

 differences are only two : E. superba has no lateral denticle 

 on the carapace^ and has the lappet of the second joint of the 

 antennular peduncle less conspicuous tlian in I'L Mnrrai/i. 



Dana's types of E. s'lpi'rba are lost. Sars's tyj)e and 

 oidy sjiccirnen is a male with th^ copulator}' apparatus of 

 the pleopods fully developed. The 'Discovery' collection, 

 though fairly lich in the species, as we regard it, as a whole, 

 contains only a few which exactly correspond to E. superba, 

 Sars, and they arc fully adult males. Mah^s with the 

 characters of E. Murrayi do not exceed 43 mm. and hav(> 

 not the full development of the copulatory apparatus, and 

 ■we have no hesitation in regarding E. superba as the fully 

 developed male of the series. Xi/ctip/iaiies Couclii [jrcscnts 

 an instance of the reduction in full-grown males of a process 

 of the second joint of the antennular peduncle which is 

 highly developed in younger males and is retained in that 

 condition in full-grown females (Holt and Tattersall, 1905). 

 In Nematoscelis microps {teste Hansen, 19)5) the lateral 

 denticle of the carapace is of merely sexual character, but as 

 it is only found in the adult female the condition is quite 

 different from that met with in E. superba. 



Examination of the mouth-parts confirms the opinion we 

 have expressed of the identity of the species now united. 



The collection contains numerous specimens from larvic 

 to adults, though fully adult males are rare. All were 

 taken outside the barrier ice, and as Mr. Hodgson seems to 

 have fished the waters below the ice very thoroughly, it may 

 be taken that E. superba is a creature of the open seas. 



Euphausia Vallentini, Stebbing (1900). 



Two specimens agreeing very well with Stebbing's de- 

 scription were taken on the way out to the Antarctic, 

 lat. 56^ 54/ S., long. 170^ 28' E. 



None occur in gatherings made within the Antarctic Circle. 



Euphausia crystallorophias, sp. n. 



Form rather robust. Carapace with the anterior margin 

 produced into a very acute rostrum exteiuling to al)out the 

 middle of the basal joints of the antennular peduncles; 



