92 ECHINODERMA OF THE INDIAN MuSEUM. PART VII. 



Acfinometra nobiliii 1888. P. H. Carpenter, "Challenger" Reports, vol. 26, 



Zoology, p. 336, pi. Ixv. 

 Actinometra dissimili-s ISSS. P. H. Carpenter, "Challenger" Reports, vol. 26, 



Zoology, p. 337. 

 Actinometra regalis 1888. P. H. Carpenter, "Challenger" Reports, vol. 26, 



Zoology, p. 347, pi. Ixviii. — 1891. Hartlaub, Nova Acta Acad. German., 



vol. 58, No. 1, p. 99. 

 Actinometra parvicirra ipavt) 1891. Hartlaub, Nova Acta Acad. German., vol 



58, No. 1, p. 96. 

 Actinometra'': duplex 1894 Bell, P. Z. S., 1894, p. 396. 

 Actinometra tijpica 1902. Bell, in Gardiner, Fauna and Geography of the Mal- 



dive and Laccadive Archipelagoes, vol. 1, part 3, p. 225. 



Localities. — Off Tohu Island : 35 fathoms. — One small specimen with about 

 seventy arms, many of which are arising by multiplicative regeneration from 

 broken IIBr series, showing that the specimen is just passing into the adult stage 

 The division is perfectly regular, all the division series being 4 (3-|-4) except the 

 exterior IIIBr series which are 2. The dorsal perisome is plated as in the adults. 

 The centrodorsal is thin discoidal with a few rudimentary cirri and one fully 

 developed cirrus on the periphery, the latter being 10 mm. long and consisting of 

 14 segments. 



Soutfieru portion of the Malacca Straits. — One specimen with about one 

 hundred and forty arms, being slightly smaller and with slightly fewer arms than 

 the average from the Philippine Islands. The centrodorsal is rounded pentagonal, 

 flush with the surface of the radials, and bears a single cirrus 13 mm. long with 

 l4 segments. The interradial areas are covered with a uniform fine calcareous 

 deposit which is not broken up into interradial plates. The synarthrial tubercles 

 are rather prominent. The dorsal surface of the animal as a whole is nearly flat. 



Invisible Bank. — One specimen with about one hundred and twenty arms 

 130 mm. long. 



Other Records. — Mortlock Island, Carolines; Philippine Islands; Zambo- 

 anga; Cebu; Bassett-Smith Bank; Macclesfield Bank; Sunda Islands; Blanche 

 Bay, New Britain; Solomon Islands; Banda; Amboina; Malacca; Singapore; 

 Suvadiva, Maldives; Percy Island, Queensland. 



Depth. — Littoral, and down to 42 fathoms. 



Remarks. — The presence of one or two cirri in the adults of this species is 

 not at all unusal ; in fact about half the specimens I have examined exhibit this 

 condition. 



An examination of the type of Carpenter's Actinometra sc/tlegelii at Leyden 

 has shown me that it is the same thing as his Actinometra nobilis and Act. regalis 

 described seven years later. Carpenter overlooked the curious characteristic arm 

 structure in the Leyden specimen, just as he did in the type of Act. regalis, 

 though it is clearly depicted in his figure of the latter. 



The type specimen at Leyden appears to have had four cirri, of which the 



