CORALS FROM MURRAY, COCOS-KEEI.IN(^, ANO FANNINC ISI ANUS. 121 



Coliinu'lla small, composcil ot coarse tialu'cul.i'. 



Dissepiments nearly horizonral, aliout i mm. apart. 



Reproduction by equal or subequal fission, c>pposi e septa iiuiiin)* across the colnmcll.i. 



Station, Murray Island. — Southeast reet", line I, i,(ioo teit from sliori'. 



Milno Eilwanls aiul llaiiiie ili\iile Ca'loria into tuo f^roiips, \i/,: § A with loiii; 

 and § AA with siuHt cahcniar scries. 1 he secomi j^roiip is sululuiileil mti) § C, 

 "walls thin," and § LV "wall a little thick." § C contains C. dcedaltui, C. siiiriisis, 

 C. stru'la, and C. astrtnjorniis. (!. dudalrii and C. tiftrrijontiis are representiHl ui 

 the U. S. Natitnial Miiseinn hy specniiens from several localities in the liuli.in .md 

 Pacific Oceans, and (L sinnisis and C. str'tcta by specimens from the soiulurn I'liil- 

 ippines. 'ihe specimen from Mnrray Island accords \\ith the mar-iinal part of a 

 lMiihp]mic specimen wliich 1 have rcferreil to C. siricta. On llie top of the coralhim 

 of the latter specimen the series are somewh.u widei, longer, and deeper, ami ilu' 

 walls are thin and peiforate. The septa aie more crowilid ih.m in ('. siih'iisis, as 

 Milne Edwards and llaime have stateil. 



Distribution. — Straits of Malacca; souilurn Philippines; Torres Strait. 



Genus HYDNOPHORA Fischer de Waldheim. 



1807. Ilydnophora Kisclier ili' VV.iIilhcim, Miis. DomiilDll, vol. i, p. :iK. • pl;itt' (iflVri'iu'r tiikcii fnnn 



Kiscliur do W.iUllu'lm's' ()iyi'ti>j;i iiplilc, etc.). 

 1810. IIydnu[>hora FiscluM df W.iKllu'lm, Uiilurclus stir lis llydiiopliori's, pp. 7 1 ;, 1 phuc. 

 18)0-18(7. Ilyilnophora Kisilu'i dc WjldlK-im, Oiyctoniapliii' du mniviTiiomcilt dr Mdscoii, p. 155. 

 1857. Ilydnophora Miliiu Fdw.uds Jiid ll.iiiiu-. Hist. ii;ir. Corall., vol. 2, p. 418. 

 1901. llydnophorfUa Dilate and lliroii.ird, Iraiti' do ZdoI. ciiiU'riTo, vol. i, pt. ;, p. 62S. 



iype species: Ifvdnophvra diinidovii I'lschei di' \V;ildheim = A/f/(//v/i(;/v/ cxrsa 

 Pallas." 



As I'lscher s:iys, rejiardinj; his //. dcmidovii, in his "()rycto<;iapiiie," "C\' heaii 

 polyjiier viv;mt, des Indes orieiitales, est le type du j^enrc," it is astoiiishinj; that 

 Delage and Herouaid shoidd propose a new generic name for the type species, 

 because I'lscher erroneously referred some fossil ct)rals to tlie oeiuis. I'isclier's 

 figures of 7/. dcmiduvii in his "Oryctographie" (jilate 32) are excellent, and Ilydno- 

 phora is one of the most securely established of coral genera. 



Hydnophora exesa (Pallas). 



Plate 47, figures 2, 2a, specimen from Muiray Island; plate 48, liniMc i, speiinien from .soutluMii I'liillppinc Ishnul';. 



1857. Ilydnophora exesa Milne I'.dwards and Ilalinc, Hist. nat. Corall,, vol. 2, p. 420. 



1874. Ilydnophora contignalio Kliin/.inniM, Km all, Uotli, Mcer., pt. 3, p. 22, plate j, (Iks, 2, jj plate 9, fins. I2a-c. 



1906. Ilydnophora contignalio von Maren/.illiT, Dinksilir, k, k, Ak. Wiss. Wien, vol. 80, p. 81, plate 23, 



fig. 82(i; plate 24, tig. 82. 



1907. llydnophorella exe.ui Bedot, Mailriporains d'.Anihoini', p, ujip. plair 21;, figs, 12) 129. 



The identification is based on figures |-)ublished by von Maren/ellei ami Hedot. 



A single small but perfect corallum was collected by Dr. Mayer. 



Station, Murray Island. — Reef flat, northwest side of ishmd, about 300 feet 

 from shore; water about 2 inches at low tide; bard bottom. 



Milne Edwards and llaime pointed out tb;it II. rxrsa, II. dcmidojfi, and //. 

 polygonata all probably represent stages or growth facies of one species, and that 

 the difference between //. drmidojfi and //. lobata is slight. Stanley Claidiiicr has 

 discussed the relations of these forms,' and refers //. tcnflla (Juelch to the synonymy 

 of //. exesa. Von Maren/.eller figures ;i specimen which he refers to //. coniignatio 

 (Eorskal), of which, according to Klun/.inger, //. ehrenhergii Milne Edwards and 

 Haime is a synonym. Bedot further discusses the relations of the forms. Present 



'Proc. Zool. Soc. London for 1899, pp. 745, 746. 



