284 DISCOVERY REPORTS 



A. Eiigeniae, Koehler, 1917. Echinodermes de Kerguelen. Ann. Inst. Oceanogr., vii, 8, p. 63, 



pi. viii, figs. 1-9. 

 A. Eugeniae, Koehler, 1923. Swedish Antarct. Exped., Asteries et Ophiures, p. no, pi. xiv, 



fig. 7. 

 A. Eugeniae, Hertz, 1926. Deutsche Siidpolar-Exped. Ophiuroiden, p. 29. 



Although this species is not represented in the material collected by the Discovery 

 Committee, I may say some few words about it. The type oi A. Etigenioe was never figured. 

 Thinking it desirable to have that done, I applied to my friend Professor Sixten Bock of 

 the Stockholm Museum, asking him to lend me the type specimen for this purpose, 

 which he very kindly did. It is in rather poor condition, with all the arms broken oflF 

 close to the disk ; but the disk is sufficiently well preserved to afford a drawing of the 

 oral side, which is given in Fig. 21. 



The dorsal side of the disk very 

 closely resembles that shown so ex- 

 cellently in pi. 4, fig. 9, of Clark's 

 Catalogue of the Recent Ophiurans ; 

 there is thus no reason to give a 

 special drawing of it. In the figure 

 of the oral side of a specimen from 

 the Swedish Antarctic Expedition 

 given by Koehler (op. cit., 1923, pi. 

 xiv, fig. 7) the shape of the buccal 

 shields is somewhat different from 

 that of the type specimen (Fig. 21), 

 the outer lobe being more distinct. 

 As these specimens from the Swedish 

 Antarctic Expedition (which Pro- 

 fessor Sixten Bock has likewise sent me for examination) otherwise closely agree with 

 the type, and as moreover they show some variation in the shape of the buccal shields — 

 some even being exactly as in the type — no weight, of course, can be laid on this slight 

 difference. 



The examination of some of the specimens from the Swedish South Polar Expedition 

 shows this species to be viviparous. I have found only female gonads, even in young 

 specimens of only 5 mm. diameter of disk; the gonads here were very small, with only 

 one quite young egg. It would seem then that this species is usually parthenogenefic. 

 The fact that the South American specimens all have a small papilla outside the large 

 outer mouth papilla affords a conspicuous difference from the specimens from 

 Kerguelen, which according to Koehler (Echinodermes de Kerguelen, p. 63, pi. viii, 

 figs. 1-9) have constantly only one outer mouth papilla. In his work of 1923 {op. cit., 

 p. Ill) Koehler has called attention to this difference and suggests that the Kerguelen 

 form may represent a variety of A. Eugeniae, without, however, taking up a definite 

 position on the question. There can, in my opinion, be no doubt that the Kerguelen 



Fig. 



21. Part of oral side of Amphiura Eugeniae, 

 Ljungman. Type specimen. X20. 



