GENERAL HISTORY. 7 



22) his description of the genus Ncbu/ipora, which had formerly 



appeared in the 'Annals of Natural History,' and 



I 51 con- £orured the three species of the s^enus which had been 



described in the latter periodical. He also defined 



the genus Stenopora as follows : — 



" Polypidom polymorphous, composed of round or poly- 

 gonal tubes radiating from an imaginary axis to the surface, 

 where the bounding-ridges are tuberculated ; young tubes 

 interpolated by lateral budding between the old ; tubes con- 

 stricted at irregular distances in planes parallel with the 

 surface, and partially closed at the orifice by a concave dia- 

 phragm perforated in the centre ; no connecting tubuli nor 

 foramina." The species described under the head of Steno- 

 pora are S. fibrosa, Goldf sp. (with two varieties — viz., van 

 lycopoditcs, Say, and var. regularis, M'Coy), S. ? granulosa., 

 Goldf. sp., 6". infiaia, De Kon. sp., and 6". iiimida, Phill. sp. 

 With the exception of the last of these, it is probably impos- 

 sible for any one who has not examined the original speci- 

 mens which Professor M'Coy had in his possession, to decide 

 with any preciseness what were the forms upon which he 

 actually based his determinations of these species. It may, 

 however, be taken as tolerably certain that the forms which 

 M'Coy described under the names of S. fibrosa (with its 

 varieties) and 6^. hmtida, are, at any rate, not referable to 

 Stenopora, Lonsdale, and that they are probably true Monti- 

 culiporce. It is therefore certain that Stenopora, M'Coy, is 

 not an equivalent of Stenopora, Lonsd., and it may be regarded 

 as almost certain that it is a mere synonym of Alonticnlipora, 

 D'Orb. As to what may be the true nature of the forms 

 described by M'Coy under the names of Stenopora ? granulosa^ 

 Goldf. sp., and 5*. inflata, De Kon. sp,, nothing positive could 

 be said without the previous examination of the original 

 specimens. 



In the same year (1851) appeared the second volume of the 

 magnificent ' Palaeontology of New York,' by Professor James 

 Hall. In this work Professor Hall figured a species of Mon- 



