MEMOIRS OF THP: NATIONAL ACADEMY OF SCIENCES. 407 



work has been carried out, awaj' from collections of all but West Indian corals, has rendered 

 impossible a comparison with other species. 



A complete knowledge of anj- coral form can be obtained onl}' from a full description of both 

 the polypal and skeletal parts, such as has been carried out in a few cases by Fowler, von Heider, 

 Bourne, and Gardiner. But in the present instance it has been deemed advisable to confine the 

 studies wholly to the soft parts; for some time such will remain the most pressing need among 

 workers of the group. 



The main object of the work has been to determine, from an examination of as many coral 

 forms as possible, the principal facts of morphology within the group, and the illu-^trations are in 

 the main limited to these." 



"The following is the list of species studied. The terminology and orthography adopted is mainly that of 

 Milne and Edwards and Haime (1857). The recent papers of Vaughan (1901, 1901a) and Verrill (1901) have shown 

 that this is in great need of revision. I haVe a<lded the names suggested by these authors where they differ from 

 those here employed. In the descriptive part of the work the usual references and synonyms of the species are 

 omitted, as these are sufficiently noticed in the papers mentioned, and also in that of (Jregory (189.5). 



Madrejjora muricata Linn;eus — forma cenricomis (Lam.); ioTina. j)rol!fe7-a (Lam.); ((^rtna, palmatu (Lam.) =Jso7)')iv( 



muricata (Linn.) [Vaughan] = /I croporn Huo-i'cota (Linn.) [Verrill]. 

 Pontes astnvoides Lamarck =Pori(f.s- asln'oldes 'Lam. [Vaughan] =Po?-ife'.< astrcoide>! Lam. [Verrill]. 

 Pontes dararia lj'd\narc^=Porites poritcs (Pallas) forma clarurin Lam. [Vaughan] =Pon7e.'.'/jo/;/wo(7)/i(( Link [Verrill]. 

 Pontes furcala Tua.marc'k= Porites porites (Pallas) iorma. furi-ala Lam. [Vaughan]. 

 Porites divaricnta Lesueur = Porites porltes (Pallas) forma dieariratu Le Sueur [Vaughan]. 

 Astranr/la solitarla Lesueur. 

 Phyllangla americana Milne Edwards & Haime. 

 Chdocora arbuscula (Lesueur). 



Orhkella annularis (EUia & Solander) = 0/'6tccMa acropora (Linn.) [Vaughan]. 

 Orhicella radiata (Ellis & iiola.ndeT)^Orbicella cavernosa (Linn.) [Verrill]. 

 Orblcella cavernosa (Linna?us). 

 SoUnastr<ra hyades (Dana). 

 Stephanucirnia intersepta (Esper). 

 Faviafragum (Esper). 



Dichoarnia stokesi Milne Edwards & Haime. 

 Isophyllki dipsacea Dana. 



Manicina areolata (Linn:eus)=J/;i'«)!(/)-a areolata (Linn.) [Verrill]. 

 Colpophyllia r/yrosa (Ellis & Solander)=J/a'/iM;i)«( rjyrosa (Ell. & Sol.) [Verrill]. 

 il/a'andrina Zaij/rm^/ti'crt (Ellis & Sol^nder) =Pfatt/3»/ra labyrinthica (Le Sueur) [Vaughan] = .l/;«mrfra cerebrum (¥.\\. 



&Sol.) [Verrill]. 

 Diploria lubyrinthiformis (Linnaeus) =J!fa;a)irfry, labyrinthlformis (Linn. ) [Verrill]. 

 Pectinia mira^idrites ('lAnnxna)=^f!eandrina inseandrites (Linn.) [Vaughan]. 

 Ocidina diffusa Lamarck. 

 Siderastrsca radians (Pallas). 

 Siderastnea siderea. (Ellis & Solander). 

 Agaricia fragilis Dana. 

 Agaricia agaricites (Linnieus). 



