32 Proceedings of the Royal Physical Society. 



seems likely that both these young specimens from Torres Strait and the 

 Mergui Archipelago belong to A. Jlavescens. 



Previously recorded from Port Jackson and Freemantle. 



11. Anthenea pentagonula (Lam.), Perr. 



Perrier, loc. cit., v. p. 90. Goniodiscus articulatus, Ed. P. (non Liitken) Pedicellaires, 



p. 279. 



Locality. — XLL, Moskos Islands, 12 to 25 fathoms, rock and sand. 



A single dried specimen in which .$=120, r = 62. Number of marginal 

 plates, 19. The arms are more acute than in the smaller specimens in the 

 British Museum. 



Known from Hong Kong, Madras, and N.W. Australia. 



12. Pentaceros granulosus, Gray. 



Perrier, loc. cit., v. p. 52. 



Locality. — IX., Between Courts and Bentinck Islands, 12 to 26 fathoms, 

 coral and sand. 



Several dried specimens, it! = 34, r=14; it! = 20, r = 7. 



This species, which has the habit of a Goniodiscus rather than of a 

 Pentaceros has been referred, from Singapore specimens, to Goniodiscus 

 articulatus (Linn.), Liitken, by F. P. Bedford ("Malayan Echinoderms," 

 P Z.S. (1900), p. 294). The specimens in the present collection agree in 

 all respects with certain ones from Singapore in the British Museum 

 (P. granulosus), and in the meantime it may be advisable to keep the two 

 species separate. 



Apparently only recorded previously from Swan River and Freemantle, 

 Western Australia. 



13. Pentaceros lincki (de Blainv.). 

 P. muricatus, Perrier, loc. cit., v. p. 55. 



Localities. — XIV., Bushby Island, 15 to 23 fathoms, sand, shell, and rock ; 



XVII., Sir John Malcolm Island, 14 fathoms, sand and rock ; XXV. 



Gregory Group, 4 to 14 fathoms, sand and shell. 



Very frequent on the pearl banks, where it is reputed by the divers to 



work havoc among the mother-of-pearl oysters. The collection includes 



a series of nine dried specimens of this variable species. 



In some specimens the development of spines is very luxuriant, and in 

 these cases the distal supero-marginals bear conspicuous spines : in other 



