64 PERCY SLADEN TRUST EXPEDITION 



accommodated in the esocoele, one in front of the other. Small immature ova are present 

 in the endoderm surrounding the eggs. 



Polyps examined, six, from a dredged specimen from Maldives. 



B. Corallum. Milne Edwards and Haime's type of G. musicalis, which was perhaps 

 Lamarck's type of Caryophyllia musicalis, is a small rubbed specimen. Of their three 

 examples of G. clavus, one is equally damaged, but the two others resemble my examples 

 of the present species. 



Ortmann's figured type of G. heterocyathiis is a long, somewhat cylindrical specimen, 

 measurmg 23 x 16 cm. 



Qaelch's recorded example (11x9 cm.) of G. musicalis from Somerset, Cape York, 

 has corallites with broken margins. A specimen (7x7x4 cm.) from Kandavu and 

 another (4 "5 x 4"5 cm.) from Amboina, which he referred to G. fascicularis and G. tenella, 

 Brtigg., respectively, come under the present species in size of corallites, number and 

 roughness of septa, thickness of columella, etc. 



Localities. Maldives (3). Coin, Peros (l). Also from Fiji (Milne Edwards and Haime 

 and Quelch) ; Ceylon (Ortmann), Torres Strait and Amboina (Quelch). 



3. Galaxea lamaecki, Milne Edwards and Haime. (PL 13, fig. 6 ; 16, fig. 1 ; 

 34, fig. 2.) 



? 1766. Madrepora organum, Pallas, Elench. Zooph., p. 317. 



? 1815. Galaxea organum, Oken, Lehrb. Naturg., i, p. 73. 



1816. Sarcinula organum, Lamarck, Hist. Anim. sans vert., ii, p. 223 ; 2" edit., p. 241 (non Madrepora 



organum, Linnaeus). 

 1816. Caryophyllia astreata, Lamarck, Hist. Anim. sans vert., ii, p. 227 ; 2" edit., p. 250. 

 1830. Sarcinula astreata, Blainville, Diet. Sci. Nat., Ix, p. 314; Manuel d'AotinoL, p. 348. 

 1834. Anthophyllum sphcerula, Ehrenberg, Corall. roth. Meer., p. 89. 



1848. Sarcinula organum, Milne Edwards, Atlas grande edit. Regne Anim. Cuvier, Zooph., pi.' 85, fig. 1 

 1848. Sarcinida organum, Milne Edwards and Haime, Ann. Sci. Nat., Zool., 3" ser., x, p. 311. 

 1848. Sarcinula astreata, Milne Edwards and Haime, Ann. Sci. Nat., Zool., 3° ser., x, p. 317. 

 1851. Galaxea lamarcki and astreata, Milne Edwards and Haime, Pol. foss. terr. palseoz., etc., pp. 70 and 71. 

 1857. Galaxea lamarcki, Milne Edwards and Haime. Hist. Nat. Corall., ii, p. 225. 

 1857. Galaxea astrceata, Milne Edwards and Haime, Hist. Nat. Corall, ii, p. 230. 

 1879. Galaxea lamarcki, Klunzinger, Korall. Roth. Meer., ii, p. 77. 

 1886. Galaxea explanata, Quelch, Reef Corals, Challenger Reports, Zool., vol xvi, pt. xlvi, p. 71, pi. 4, 



figs. 6 — Qd. 

 1904. Galaxea lamarcki, Gardiner, Fauna Geogr. Maldives and Laccadives, ii, p. 783. 

 1904. Galaxea, sp. ? Gardiner, Fauna Geogr. Maldives and Laccadives, ii, p. 783. 



Corallum. Perithecal vesicles larger than in any previous species, up to 2x1 mm. — 

 hence corallum very light — closed on surface. Corallites always round, smaller than in all 

 other species, less projecting, maximum 2 mm., 2 — 4 mm. apart. Walls up to "5 mm. thick. 

 Calices usually 2 mm. in diameter, maximum 3 mm. Septa in three orders, sides rough, 

 edges entire; usually primaries only meeting columella, exsert up to 1 mm., secondaries 

 thinner, sometimes varying in number, rarely all the six reaching columella. Costse incon- 

 spicuous. Columella circular in outline, distinct. Budding from any part of peritheca. 



Polyps useless for any detailed study. Two were sectioned from specimen from 

 S. Nilandu (36 fins.) and one from another specimen from Peros (16 fms.). 



Remarks. There is no doubt that this is a distinct species. The small piece fi:om 



