14 F. JEFFREY BELL. 



The single* six-armed specimen taken by the 'Discovery' at 8-15 fms. off Cape 

 Wadsworth is a good deal stouter than Ljungman's types, but I can see no reason for 

 making it a new species ; the arms of the young may be seen projecting from some of 

 the bursae. 



OPHIACANTHA COSMICA. 



Ophiacantha cosmica, Lyman, Chall. Rep. Ophiur. (1882), p. 194 ibique citatum. 



This widely spread species was taken on various occasions, but many of the 

 specimens have been marked by me " immature " ; in connection with this I should 

 like to quote some words of Mr. Lyman : " The specimen just described is unusually 

 large for this division of the genus, which leads me to think that the bulk of those 

 now known are immature, and therefore to be treated with all the more caution." 



Winter Quarters-. Off Coulman Island, 100 fms. Off Barrier, 300 fms. 



OPHIOCONIS ANTARCTICA. 

 Ophiocoiiis antarctica, Lyman, Chall. Rep. Ophiur. (1882), p. 107 ibique citatum. 



If I have correctly determined some specimens from Winter Quarters, the types 

 of Mr. Lyman 's are very far from reaching the size to which this form attains. 



AMPHIURA BELGICAE. 



Amphiura beli/icat, Koehler, Res. Voy. 'Belgica' (1901), p. 27. 



The Antarctic area appears to be the home of large specimens of Amphiura ; not 

 only did the ' Discovery ' bring home several examples of what appear to be the 

 species obtained by the ' Belgica,' but there is a single specimen off the Barrier at 

 301 fms., which has a disc diameter of 18 mm.,f and which can hardly, I think, be 

 the fully adult example of the somewhat smaller specimens ; but, as it is solitary, I 

 hesitate to regard it as an undescribed species. 



Several specimens of A. belgicae were taken at Cape Wadsworth, 8 to 15 fms., and 

 off the Barrier at -300 fms. ; the latter is, as already said, the locality of the single 

 larger form. Like Solaster octoradiatus, A. belgicae is probably a circumpolar species. 



YOUNG OPHIURID. 

 (Plate IV.) 



I give some figures of a remarkable Ophiuroid, to which it is very difficult to 

 assign a systematic place ; it appears to be a young form in which some of the arm- 

 plates are still not consolidated. The exceedingly large size of the bursal slits is 

 perhaps only due to the mode of preservation. 



Two specimens, both broken, were taken in Winter Quarters on 2. 1. 04, and two 

 off Barrier. 



* As there is but a single specimen this collection throws no critical light on Prof. Koehler's just-made 

 suggestion that this species exhibits sexual limorphism ; cf. Bull. Sci. France xli. (1907), p. 322. 



t That is exactly the same as the disk diameter of A. magnified, of which Prof. Koehler has lately published 

 a brief diagnosis. See Zool. Anz. xxxii., p. 146 (17 Sept. 1907), but the species is not the same. 



