Echinoidea and Asteroidea from Mergui Archipelago. 31 



Also known from Singapore, the Sunda Straits, and Western Australia. 



There is quite evidently some confusion prevalent with regard to this 

 species. Perrier (" Pedicellaires," Ann. Sci. Nat., xii. (1869), p. 279) describes 

 his Goniodiscus articidatus, Ed. P., which is certainly not Goniodiscus 

 articulatus, Lutken, nor Asterias articulata, Linn. In his Revision des 

 SUllerides (v. p. 91), Perrier reduces his Goniodiscus articidatus to Anthenea 

 joentagonula (Lam.), and these are the same species, but Goniodiscus articu- 

 latus (Linn.), Lutken, is quite distinct. 



9. Stellaster incei, Gray. 

 Perrier, loc. cit., v. p. 43. 



Localities. — II., East of Iron Island, 10 to 25 fathoms, stone and mud; 

 XXXI II., Christmas Island, 23 fathoms, sand and mud; IX., Between 

 Courts and Bentinck Islands, 12 to 26 fathoms, coral and sand ; XVIII.. 

 Off Paway Island, 10 to 21 fathoms, sand and shell ; XXV, Gregory 

 Group, 4 to 14 fathoms, sand and shell; XXII., Hastings Harbour, 

 St Luke's Island, 15 to 20 fathoms, sand and shell. 

 The commonest asteroid in the Mergui Archipelago, and represented in 

 this collection by an extensive series of specimens. Among these are certain 

 ones which might be referred to S. belcheri, Gray, but the distinctive characters, 

 never very marked, break down entirely in intermediate forms. It is there- 

 fore unjustifiable to separate the two species, and I have followed F. P. 

 Bedford (P.Z.S. (1900), p. 294) in combining them under the first name. 

 The measurements of the largest and smallest are 



72 = 51 r = 21 22 = 30 r = 12. 



Becorded from Sumatra and Singapore to Australia, and Korea, and 

 Ceylon, but apparently rare in the Indian Ocean. A single one has been 

 recorded from the Mozambique coast. 



10. Anthenea flavescens (Gray), Perr. 



Perrier, loc. cit., v. p. 92. 



Localities. — II., East of Iron Island, 10 to 25 fathoms, stones and mud ; 

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



In the largest specimen 72 = 50 and r = 21. 



The smallest specimen (22 = 20) from the Gregory Group shows a strong 

 resemblance to a young form of Anthenea dredged by the " Challenger " in 

 Torres Strait and referred provisionally by Sladen to Anthenea tuberculosa, 

 Gray, juv. (" Challenger" Reports, xxx. p. 340, and pi. lvi. figs. 5 to 8). It 



