14 F. JEFi'llEV BELL. 



The siugle* six-armed specimen taken l)y the 'Discovery' at 8-15 iins. oti' Cape 



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



making it a new species : the arms of tlie \'oung may l)e seen projecting from some of 



the bursae. 



Ophiacantha cosmica. 



Ojihiaeant/ia cosmica, Lyman, ("hall. Hep. Opliiur. (I8S2), p. ID-l ibiqiie cilatiim. 



This widely spread species was taken on various occasions, l)ut many <if tlie 

 specimens have been mai'kcd by me " immature " ; in connection with this 1 should 

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

 larse for this division of the 2;enus, 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. 



OpHIOC'ONIS ANTARCTICA. 

 Ophioconis antarctka, Lyman, Chall. Rep. Ophiur. (1882), p. 107 ibique ritatam. 



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/icac, Koehler, Res. Toy. 'Belgica' (I'JOl), p. 27. 



The Antarctic area appears to be tlie 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,' 1)ut there is a single specimen off the Barrier at 

 oOl fms., which has a disc diameter of 18 mm.,f and which can hardly, I think, l)e 

 the fulh' adult example of the somewhat smaller specimens ; 1)ut, as it is solitary, I 

 hesitate to regard it as an undescribed species. 



Sevei'al specimens "of A. hdgicae were taken at Cape Wadsworth, 8 to 15 fms., and 

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

 larger form. Like Solaster octuradiatus, A. hclgicae i-s probaljly a circumpolar species. 



Young ophiurid. 

 (Plate IV.) 

 I o-ive some fisui-es of a I'cmarkable Ophiuroid, to which it is verv difficult to 

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

 plates ai'e still not consolidated. The exceedingly large size of the bursal slits is 

 perhaps onl\- due to the mode of preservation. ' . 



Two specimens, both broken, were taken in A\'inter (,)nar(ers on -J. 1. 04, and two 

 off Barrier. 



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

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



t That is exactly the same as tlio disk diameter of A. magnifica, of which Prof. Koehler has lately iiublished 

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



