ITALIAN GONIOPOR^ HI 



branches are rotinded. Forms in which the forkings are more divergent also occur ; in these the 

 rounded tops sometimes divide into three (I.e., pi. xxvii. fig. 1). The thickness of the stems 

 varies, being apparently secondarily tliickened by downward growths from the living tops. 



The calicles are most conspicuous on the youngest tops where they have slightly raised 

 walls. They axe here 2-2*7 mm. across and slightly pitted: lower down they are quite flusli 

 with the surface. The walls are thin, wavy, and echinulate, and here and there incomplete. 

 The septa are 24 * and show clear traces of the typical arrangement in which the tertiaries 

 bend round to fuse with the secondaries between them. Their upper edges are sharply 

 granulated. Six very small pali surround an inconspicuous central tubercle ; they are shown 

 so very much smaller than the septal granules, whereas they should be so much larger (see 

 diagram A, p. 21) as to make a re-examination of the specimens a desideratum. 



The Porites I'uinosa of Catullo, from " S. Urbano" near Montecchio Maggiore, may or may 

 not be the same. Catullo's figures may be bad, as Eeuss suggests. But considering the difference 

 in locality, and in the character of the septal skeleton, which is clearly indicated in Catullo's 

 figures as rigidly radial, we must keep them apart. 



There is a branching form in the National Collection labelled P. ramosa Catullo, from 

 " Fontana della Bove." It is also said to be " Oligocene," but both from tlie surface 

 aspect and from the section, which is obscured by the hollowing out of the skeleton by a 

 parasitic alga, one would say the walls were thick and reticular, and hence not like those of 

 this coral. See description below, G. Vicenza 12, 



The great beds of branching Gonioporw found fossil at Grosara remind one of the beds of 

 branching Porites now living in tlie West Indies and on the Florida reefs, but, as far as I know, 

 iijt in any other localities. 



'••(». Goniopora Vicenza (i6)8« 

 [8. Giov. Ilarione (Middle Eocene).] 



Porites pdlegrinii, Reuss (partim), Denksch. K. Ak. Wiss. Wien, xxxiii. (1874) p. 17, pi. xl. figs. 



9, 10. 

 ? Porites pellegrinii, D'Achiardi, Corall. Foss. Nummulit. Alp. Venete (Pisa 1867). 

 ? Porites pellegrinii, D'Achiardi, Atti Soc. Toscana(Pisa 1875), p. 203. 



Non "Pontes pellegrinii," Duncan, Sind. Fos.s. Corals, Mem. Geol. Surv. India (1880) p. 67; pi. v. figs. 

 14 .and 15. 



De.tcripfion. — Corallum forms small, compressed, lobate colonies (" lappig-astig "). 

 This method of growth is fairly constant. 



Calicles not over 2 ■ 5-3 mm., irregularly polygonal or rounded-hexagonal, very shallow. 

 Walls very low, but sharp and perforated. 



Septa 16-20, nearly uniform, tliick near the walls, short, ending freely, and pointed; 



* Reuss wrote 10-14, of wliich 5-8 reach the axis. It is true that they are often confused, but 

 his figure 1 h leaves no doubt whatever but that the typical formula (see Introduction, j). 21) underlies 

 the confusion. 



