222 DISCOVERY REPORTS 



process. The hindermost and distal expansion is big. The proximal parts of its lower 

 edges (which are uppermost in the figure) are serrate ; the serrate parts are not con- 

 tinuous but are separated by a gap and lie in two different planes. 



The end of the lateral process is shaped somewhat like a cargo hook ; it has no tooth 

 on the distal curve. 



I have not measured large numbers of this neritic species as I have of the others 

 which are oceanic. Tattersall, who examined the big collections of the Discovery 

 (National Antarctic) and Terra Nova Expeditions, says in the first of his two reports 

 (1908, p. 11) that the largest adult specimens of both sexes measure 32 mm.; in the 

 second report (1924, p. 19) he records a length of 33 mm. 



Tattersall (1908, p. 11, pi. ii, figs. 8-10) has given figures and a very brief account of 

 a Calyptopis, a Furcilia and a Cyrtopia ; but nothing is known of the variety of Furcilia 

 forms which occur and of which among them are dominant. 



Remarks. Zimmer's careful description and drawings of the copulatory organ 

 (1914, p. 426, pi. xxvi, figs. 60-64) <io not agree with mine, and are taken from an 

 immature individual ; I have seen that stage of development. My description is based 

 on specimens taken from one part of the Antarctic only, the west coast of Graham Land ; 

 but Dr Gordon has allowed me to examine an adult male, from the British Museum 

 collection, taken from the other side of the continent, from the Ross Sea, and its copu- 

 latory organ was identical with those of my specimens. 



I think that none of lUig's records (1930, p. 500, fig. 182) is correct. His figure of the 

 male copulatory organ is certainly not that of E. crystallorophias; it is most like E. 

 frigida. Through the kindness of Dr Schellenberg of the Zoologisches Museum, Berlin, 

 I was able to examine his specimens from St. 90, WNW of Cape Town, St. 135, ESE of 

 Bouvet Island and St. 145, NW of Enderby Land. I could not determine the single 

 female or immature specimen from St. 90, but it was certainly not E. crystallorophias ; 

 the eight specimens that I saw from St. 135 were E. frigida, one male and seven females ; 

 the three females from St. 145 were E. frigida. His other records are from off the African 

 coast where E. crystallorophias cannot occur, or from deep water in the Antarctic where 

 it is very unlikely to be found (see below). Rustad (1934, pp. 41-3) has given a list of 

 the "most remarkable" of lUig's records of Euphausians. 



Distribution. I found this species in only one of the net hauls examined during the 

 second commission of the ' Discovery H ', and that was from a station in shallow water, 

 304 m., in the western entrance to the Bransfield Strait. During the previous com- 

 mission Dr Kemp found it at fourteen stations, one of which was on the south side of 

 the Bransfield Strait and the others in the Bellingshausen Sea. Of these all but two were 

 near the land, the west coast of Graham Land, and in shallow water — the depths were 

 between 177 and 604 m. The other two stations (Sts. 563 and 579, Discovery Reports, iv, 

 pp. 122-5) were in deep water some considerable distance from land and shallow water. 

 Both were between 66^ and 70° S and 79 and 79^ W, and the depths were 3875 and 

 4056 m. At each of them only one small specimen was taken. 



The specimens taken in abundance by the National Antarctic (Discovery) and British 



