NIAGARA GROUP. 127 



517. 1. CATENIPORA ESCHAROIDES. 



Vl. XXXV. Fig. 1 a, b, c. 

 Miltepora- Fougt, 174-5. 

 Millepora tubis ovatis longitudinaliter reticulatim concafenalis. Linxe, AmoJn. Acadernicae, t. 



i, p. 208, f. 20, 1749. 

 Tabipora catcnulata. Gmelin : Liknk, p. 3753. 

 Tubularia cateniilata. Knorr, Recueil, t. 2, pp. 16, 57, 58; tab. F. ix, F. ix', f 4, t. 3, p. 



158; supp. tab. vi a, f. 1, 1775. 

 7\ibularia catenuluta. Wallerius, Min. Uebersetz, p 439. 

 T. gothlandica. Broaiel, Nr. 10, 11. 



Millepora catcnularia. Esper, Petrefacta, tab. v, f. 1, 1795. 

 Chain Coral (^Tubipora catcnulata, Linn.'), Parkikson, Organic Remains, Vol. ii, pag. 20, pi. 



iii, fig. 4, 5, 6, 1808 ; 2d edition, 1833, pi. iii (18) of Vol. i, figs. 



4, 5, 6. 

 Catenipora escharoidcs . Lamarck, Anim. sans vertebres, 1st edition, t. 2, p. 207, 1816. 



— — L.AMOROCX, Expos, methodique, p. 65, 1821 ; C. tabulosa, ib. id. note. 



— — Schweigger. Bpobachtungen, tab. vii, 1819. 



— — Say, Am. Jour. Science, Vol. ii, p. 34, 1819. 



— — GoLDFUss, Petrefacta, p. 74, t xxv, f. 4 n - c, 1826. 



— — Steininger, Mem. Geol. de France, t. 1, p. 341, 1831. 



— — Ehrekberg, Abhandlungen, 1831. 



— — Kokig, Akad. Berlin, p. 344, 1832. 



— — De Blatxville, Man. d'Actinologie, pag. 352, pi. 62, f. 1, 1834. 



— — Mii-.NE Edwards, 2d edition of Lamarck, t. 2, p. 322, 1830. 



— — HisiKGER, Lethea Suecica, p. 94, t. xxvi, f. 9, 1837. 



— — Lonsdale : Murchison, Sil. System, pag. 685, pi. 15 bis, fig 14, 



14 a, 14 b. 



— — Hall, Geol. Rep. 4lh Dist. N. York : Tables of organic remains, no. 



22, fig. 1, 1843. 

 7\ibiporites catenarius. Schlotheim, Petrefacta, p. 366, 1820. 

 Halysites. Fisher, Oryct. de Moscou, 1830. 

 ffalysites escharoides. Bronn, Lethea geognostica, p. 52, 1835. 



Coral in hemispheric masses, composed of oval tubes placed laterally in juxtaposition in a 

 single series, or separated by a cellular interspace ; lines of tubes arranged in reticulated form, 

 with unequal interspaces. Tubes within, septate transversely and striated longitudinally, ex- 

 ternally transversely striated, and sometimes with more elevated ridges at equal intervals. 



This coral is so well known by its peculiar net-like structure, that a description seems 

 scarcely necessary. It presents considerable variety, however, in the mode of its reticulation 

 and the size of the spaces. The openings of the tubes upon the surface are oval, though often 

 varying in size ; and the whole expansion is frequently very thin and slender, and in other 

 cases thick and strong. 



The greater number of specimens found in New-York are siliceous, the interior structure is 

 not well preserved ; and the transverse septa seen only at irregular intervals. The striaj noticed 

 in the interior of the tube are distinct crenulated ridges like the bases of lamellae, and give to 

 the well preserved tubes a very characteristic feature. 



