ECHINODERMATA— CLARK. 547 



tiow satisfied that they belong to Stimpson's species, the type of 

 which was from Port Jackson. Unfortunately, Stimpson's 

 originals are no longer extant; they were probably destroyed 

 with so much else of his material in the great Chicago fire. But 

 his description fits these specimens in every particular, except 

 that he gives the colour as " black," and the arms " black and 

 red." This difficulty is, however, a very slight one, for while the 

 real colours appear to be blue and reddish, the blue is usually so 

 deep that it is almost bluish-black, and in life large specimens 

 probably give the impression of black and red. Stimpson's des- 

 cription of the disc, the arms, and the arm-spines fit these Port 

 Jackson specimens so well, it does not seem to me there can be 

 any doubt that we have to do with his species, spongicola. 



OPHIOMYXA AUSTRALIS. 



Ophiomyxa australis, Liitken, Add. ad. Hist. Oph,, Pt. 3, 1869, 

 p. 45. 



One specimen from Station 48. OflT Wollongong, 55-56 

 fathoms; sand and mud to rock. 



The specimen is a small one, with a disc diameter of 7 mm., and 

 an arm-length of about 28 mm., but I do not think there is any 

 doubt that it belongs to this species. 



ASTROPORPA AUSTRALIENSlS,2s sp. nov. 



(Plate liv, fig. 2.) 



Diameter of disc, 11'5 mm.; length of arm, about 68 mm.; 

 thickness of arm at base, 3 mm. Disc made up of five wedge- 

 shaped divisions, each of which corresponds to a pair of radial 

 shields, though no indications of such shields are to be seen ; the 

 inner ends of the wedges are united to form a pentagonal area, 

 6 mm. in diameter, which is covered with rather coarse granules 

 of variable size and very irregular arrangement. Upper surface 

 and sides of arms completely covered with alternating half-circles 

 of hook-bearing granules, and of smooth granules ; the former are 

 colourless or whitish, and there are four or five series in each half- 

 circle, while the smooth granules are brown, in marked contrast, 

 and there ai-e only two or three series in each half-circle. These 

 alternating half-cii'cles continue on to the disc^ forming curved 

 ridges across each radiating wedge, the innermost ridge of hook- 

 bearing granules forming the outer boundary of the disc-pentagon 

 alluded to above. There is thus no evident line of division 

 between disc and arms. Entire oral surface, even to tip of arms, 



^^ Australia, + e7isis, expressing locality. 



