ECHINODERMATA — CLARK. 54& 



rounded or pointed proximally, and more or less abruptly con- 

 tracted distally into a sort of handle, which may be half as long 

 as the plate, and is truncate distallj', where it joins the supple- 

 mental genital plates. Adoral plates large, usuallj' in contact. 

 Tooth-papillaa remarkably long, the length three or four times the 

 thickness. Under arm-plates much wider than long, somewhat 

 octagonal or hexagonal, with proximal side concave. Side arm- 

 plates not very large, not meeting either above or below ; each 

 plate carries seven glassy, very thorny arm-spines; basal joints 

 have eight or even nine spines ; uppermost or next to uppermost 

 spine longest, equal to about four joints. Tentacle-scale single, 

 small. Colour of disc, very light grey or yellowish ; of arms, 

 pale pinkish, with indications of a broad, longitudinal, white 

 stripe, dorsally. 



1 specimen from Station 48. Oft' WoUongong, 55-56 fathoms; 

 sand and mud to rock. 



2 specimens from Station 52. In Shoalhaven Bight, 19-20 

 fathoms ; sand to mud. 



It seems best for the present to consider this an undescribed 

 species, but in view of the great variety of ccespitosa I shall not 

 be surprised if it proves to be an extreme variant of that species. 

 The specimen from Station 48 is much more like ccespitosa than 

 the other two, and should, perhaps, be referred to that species, 

 bat it is in such poor condition that its real relationship is 

 uncertain. 



OPHIOTHRIX C^SPITOSA. 



Ophiothrix avspitosa, Lyman, Bull. Mus. Comp. ZooL, vi., 2, 1879, 

 p. 53. 



4 specimens from Station 10. Off Broken Head, 28 fathoms ; 

 fine sand. 



1 specimen from Station 13. Oft' Cape Three Points, 41-50 

 fathoms ; sticky mud and shell. 



1 specimen from Station 36. Off Botany Bay, 20-23 fathoms; 

 sand to rock. 



2 specimens from Station 44. Off Coogee, 49-56 fathoms ; 

 fine sand. 



4 specimei s from Station 48. Off Wollongong, 55-56 fathoms; 

 sand and mud to rock. 



1 specimen from Station 55. Off Crookhaven River, 11-15 

 fathoms; stud to rock. 



These specimens are all small, except three of those from 

 Station 10, and most of them are in very poor condition. I 

 have compared them with a cotype of aespitosa from Port Jack- 



