ASTEEOIDEA OF THE MEEGUT AECHIPEL.VGO. 



327 



marginal plates, by the spinulatiou of the infero-marginal plates, 

 and by the armature of the adambulacral plates. The presence 

 of the small tubercle on the innermost pair of supero-marginal 

 plates in the interbrachial arc, and the colour markings also serve 

 to distinguish the forms. Astropecten notograptus presents 

 several points of affinity with A. monacanthus, mihi j but the 

 broad marginal plates, the large paxillaB, the simple spinulatiou 

 of the infero-marginal plates, and the difference in the character 

 of the adambulacral armature (although only slight) serve to 

 distinguish the Mergui species. 



Subfamily Ltjtdhn.«, Sladen. 

 Genus Luidia, Forbes. 



1. Luidia forficifer, Sladen. 



Luidia forficifer, Sladen, 1888, Zool. 'Chall.' Exp. part li., Report on 

 Asteroidea, p. 258, pi. xliv. figs. 5 & 6, pi. xlv. figs. 5 & 6. 



Localities. King Island (native name Padaio); Feb. 1882. 

 Sir "William James Island ; 7th Dec. 1881. 



Remarks. One adult example, unfortunately in a bad state of 

 preservation, and a small one, almost too young for accurate 

 determination, appear to me to belong to this species. It was 

 dredged during the ' Challenger' Expedition in the Arafura Sea 

 and in Torres Strait at a depth of 6 to 28 fathoms, on sea-bottoms 

 of coral-mud and green mud. 



2. Lutdia maculata, Midler TroscJiel. 



Luidia maculata, Midler Sf TroscJiel, 1842, System der Asteriden, 

 p. 77. 



Locality. King Island (native name Padaiv); 24th Jan. 1882; 

 sublittoral. 



A single young example having nine rays. The major radial 

 dimension is 65 mm. 



Family Pentagonasteeid^:, Perrier. 



Subfamily Go> t iodiscin5:, Sladen. 



Genus Goxiodiscus, Muller 8f TroscJiel. 



1. Goxiodiscus aettculatus (Li?ine), de Loriol. 

 Asterias articulata, Linne, 1753, Mus. Tessinianum, p. 114, tab. ix. 

 fig. 3. 



ldtbt. jourx. — zoology, vol. xxi. 28 



