NO. 1526. CORA LS FROM FRENCH SOMALILAND— VA UGH AN. 265 



EXPLANATION OF PLATPX 

 Pl.ATK XVJl. 

 PJiy.togi/rd .tovialieitsix, new species, natural size p. 250 



Plate XVIII. 



rhyaogyra yrii rierl, new species p. 251 



Fi(!. 1. Upper surface of corallnm, natural size. 



2. Tangential section, showing sei)ta and dissepinients, x 4. 



Plate XIX. 

 (JyjjJtdstred forshili(tn<i (Milne Edwards and Ilaiinc), natural size p. 253 



Plate XX. 



Fig. 1. Caliees of < 'ypliastrea forskaliaim (Milne Edwards and Ilainie) x 4 p. 253 



2. Caliees of Cyphai^trea forskaiiana (Milne Edwards anil Hainie), x 4 .. p. 254 



3. Caliees of OrbiceUa annuligerci (Milne Edwards and Hainie), x 4 p. 252 



Plate XXI. 

 Orhlcelld (Dninllytrd (Milne Edwards and Hainie), natural size j). 252 



Plate XXII. 



Fig. 1. Cyphnsfrra forskalunin (]\Iilne Edwards and Hainie), natural size j). 254 



2. r*/^>//a.s/r<''f /orsAT/7/(ma (Milne Edwards and Hainie), longitudinal section of 



corallites, x 4 , p. 253 



3. Cyphastrea forsknUmia (Milne Edwards and Haime), longitudinal section of 



corallites, x 4 p. 254 



4. OrbiceUa annuligera (Milne Edwards and Haime), longitudinal .^^ection of 



corallites, x 4 p. 252 



Plate XXIII. 



Cosciitanra moiil/e (Forskal ) j). 260 



Fig. 1. Coralluni, natural size. 

 2. Caliees, x 5. 



Plate XXIV. 



Coscinancd monile ( Forskal ) p. 260 



All figures, x 4. 



Fig. 1. Tangential section of corallite, showing synapticula. 



2. Cross section of ("orallites. 



3. Face of septum, showing trabecula', perforations, and disse])iments. 



Plate XXV. 

 Croniopora so)iialinisls, new species, natural size p. 262 



Plate XXVI. 

 Uonio'pord cljihontioisis, new species, natural size p. 2t)3 



