GENERA OF FAVOSITID/E. 177 



aspect of the calices is very similar to that of some Monti- 

 culiporcB, and I should therefore doubt if simple inspection of 

 the exterior would enable one to identify a specimen of Steno- 

 pora. Certainly the presence of spines or tubercles on the lips 

 of the calices — even if a constant character — cannot be sup- 

 posed to have anything beyond a mere specific significance. 

 I shall, however, have occasion to show hereafter that the 

 spines and calicine tubercles of certain Stenoporce and Monti- 

 culiporce are not mere surface-ornaments, but that they in 

 reality are produced by the metamorphosis of a peculiar and 

 special series of corallites. 



Genus Rcemeria, Milne- Edwards and Haime, 1851. 

 (Pol. Foss. des Terr. Pal., p. 253.) 



The genus Rcemeria was founded by Milne-Edwards and 

 Haime for the reception of the single species R. infundibuli' 

 fera, the Calamopora infundibtilifera of Goldfuss (Petref. Germ., 

 t. i. p. 78, PL XXVII., fig. I, 1826). I reproduce here the 

 description given by these authorities both of the genus and 

 species : — 



Genus Rcemeria. — " Corallum forming a rounded mass, the 

 corallites united by their walls, the tabula; infundibuliform." 



Species, Rcemeria infundibulifera, Goldf — " Corallum massive, 

 sublobate; the corallites unequal, intimately united by their 

 walls at certain places, although free near their summits ; calices 

 in general polygonal, of a diameter of two or three millimetres. 

 There are traces of thin and equal-sized rudimentary septa. A 

 vertical section shows that there are tolerably regular and 

 numerous tabula;, in the form of funnels let one into the other. 

 We do not know if mural pores are actually present." 



The brevity of the above diagnosis is sufficient to show that 

 Milne-Edwards and Haime possessed but a partial knowledge 

 of the structure of the above species and of the genus which 

 they founded upon it ; nor is any additional light to be derived 



