534 " THETIS " SCIENTIFIC RESULTS, 



quite different, at least so far as one can judge from Museum 

 specimens, It seems somewhat strange that such a large and 

 apparently common starfish should have escaped notice hitherto, 

 but it is quite possible that specimens have been regarded as 

 5-rayed examples of calainaria, the superficial resemblance to 

 that species being quite obvious. But duhia is markedly "dip a- 

 canthid" in its adambulacral armature, not " mojiacanthid " as i.s 

 calamaria ; if one considers the feature of generic value, dubia 

 belongs to Perrier's genus " Distolasterias." For my part, I do 

 not consider the character either important enough in itself, or 

 sufficiently reliable in all cases, to warrant the recognition of 

 that genus. 



UNIOPHORA GLOBIFERA. 



Uniophora glohifera, Gray, Ann. Mag. Nat. Hist., vi., 1840, p. 288. 



Three specimens, without locality. 



Aside from the fact that one of the specimens has six rays, they 

 are of no particular interest, as they are not full grown, are 

 rather poorly preserved (dry) and give no indication as to where 

 they were taken. 



OPHIUROIDEA. 



The large series of Ophiurans, representing nineteen species, is 

 of great interest, not merely because ten species appear to be nevr, 

 but because some very peculiar facts in distribution are brought 

 to light. Thus the two species of Oj^hiocoma which appear to be 

 common at Lord Howe Island are not represented in the material 

 from the coast of New South Wale,s, while none of the seventeen 

 species from New South Wales were found at Lord Howe Island. 

 A very remarkable fact is the occurrence in Australian waters, 

 of an Astroporpa, a genus known hitherto only from the West 

 Indian region. The collection thus adds very materially to our 

 knowledge of Australian Ophiurans. 



PECTINURA DYSCRITA,i3 sp. nov. 



(Plate xlix., figs. 5, 6, 7.) 



Diameter of disc, 10 mm.; length of arm, 45 mm. Disc flat, 

 distinctly pentagonal, completely covered by a coarse granulation, 

 about 125 granules to a square millimeter, at centre, and about 

 70 at interradial margin ; radial shields entirely covered. Upper 



"i3S{icrKptros = hard to determine, in reference to the perplexity ali'orded by 

 this, among other species of Pectinura. 



