spathose matter ; and that from their standing back from the surface. 

 If the tubes are filled with spathose matter, that must necessarily en- 

 tirely conceal the longitudinal lamellae, and leave only exposed, at the 

 surface, the edges of the transverse septa, and of the columnal parietes 

 of the coral. But if the section happen to be in a line with, and 

 immediately upon, or directly through, any of the perpendicular la- 

 mellae, such lamellae then will indeed necessarily appear; but this cir- 

 cumstance rarely occurs. 



Volkmann, in his account of this coral, which he has figured, de- 

 scribes it as madrepora foraminosa minor, pseudo corallium album ; and 

 particularly directs the attention to its interior transverse lamellae-. 

 Dr. Woodward also mentions several specimens from different parts of 

 England, the description of which (coralloidea tubulosa crebris lamellis 

 transversis intercepta) exactly agrees with the fossil coral here de- 

 scribed. The recent coral is said to exist in the Indian sea. 



Madrepora pectinata, with rounded stars, having a radiated, ex- 

 tended, and tumid margin, is only known as a fossil. A specimen of 

 this kind, found in Silesia, is figured and described by Volkmann, 

 (Silesia Subterranea, P. 21, Tab. XIX. Fig. 2) which exactly agrees 

 with a specimen I obtained from the collection of Mr. Strange, a 

 portion of which is figured Plate VI. Fig. 5. 



So numerous are the fossil madrepores, especially those of this class, 

 with aggregated, distinct, and separated stars, that to particularise 

 them all would demand more room than this Work will admit, and 

 would occasion more expense than their introduction would authorize. 

 Many of those will therefore be omitted, whose characters cannot be 

 clearly made out, or whose ambiguous appearances render it doubtful 

 whether they may not be merely varieties of such species as are here 

 described. Thus a fossil is figured by Bourguet as, une millepore d- 

 grandes etoiles*, a similar specimen with which I possess from the 



* Traite des Petrifications, Tab. X. Fig. 4.6. 



