TRIBE III. MADREPORACEA. 537 



branches. The Cerioporae of Goldfuss, which have a corresponding 

 internal structure, belong to this genus. 



Lonsdale rests his genus Stenopora on insufficient characters.* 

 Radiation of the cells from an imaginary axis is common to all ramose 

 corals branching by furcation ( 74); and their multiplication by in- 

 terpolation is the usual mode in the Favositidae, although less apparent 

 in species with solid coralla. The constriction at intervals fails in 

 some species, and also belongs to some Favosites : it is an accident of 

 growth, (as its irregularity alone would indicate,) an intermitted mode 

 of increase, not of generic importance. The cells are shallow and 

 often angular; they close at bottom by the forming of septa, like other 

 Favositidse. 



GENUS CONSTELLARIA. We separate under this name a species 

 with the compressed branches, internal structure, and surface cells 

 of many of the above genus, but having the verrucaa oblong and 

 arranged in stellate groups over the surface, a character of physiolo- 

 gical importance. Glomerate forms may also occur. A species of 

 this genus is named Ceriopora constellata on the plates of Western 

 fossils by Van Cleve. The genera Pelagia and Lichenopora, de- 

 scribed in the Appendix to the Madreporacea, have a similar stellate 

 arrangement, but they are of doubtful character, and the last has been 

 referred to the Bryozoa group. A recent species described by Miche- 

 lin, Lichenopora glomerata, is quite similar to the Constellaria in its 

 surface and the size of the. cells ; but there are no characters stated 

 which decide that it belongs with the Favositidae. 



Lamarck's name Alveolites might be extended to the Stenoporas; but 

 the genus was based on a bad character, " a concentric structure, con- 

 sisting of enveloping layers," and includes some Bryozoa. Fischer's 

 name Chaetetes should be substituted for Stenopora, if its characters 

 admit of it. I know of no copy of the Oryctology of Moscow in this 

 country, excepting a few loose numbers of late date. 



Goldfuss's genus Calamopora, was introduced contrary to strict 

 propriety : Lamarck's name Favosites, of prior date, should have re- 



* " A ramose spherical or amorphous tubular polypidom ; tubes polygonal or cylin- 

 drical, radiated from a centre or an imaginary axis, contracted at irregular distances, but 

 in planes parallel to the surface of the specimen ; tubular mouths closed at final (?) period 

 of growth ; ridges bounding the mouths, granulated or tuberculated, additional tubes 

 interpolated." Strzekcki's N. S. Wales, p. 262. 



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