61 
Tlie following are tlie systematic descriptions : — 
Class ACTINOZOA. 
Order ZOANTHAFIA. 
Section Zoantharia sclerodermata (Madreporaria). 
Family F ayo sitid^e. 
Genus Favosites, Lamarck (pars.), 1816. 
Favosites grandipora, sp. nov. 
(PL viii., Figs. 6-9.) 
Sp. Char . — Corallum generally forming sublobate, ramose 
masses, but variable in size, apparently dichotomously 
branched, the whole free surface occupied by the calices of 
the corallites, the axial portion of the corallum being much in 
excess of the peripheral. Corallites long and slender, in the 
axial region polygonal, but from the deposition of secondary 
matter, or sclerenchyma, becoming oval or irregular in outline ; 
usually equal in size, but with smaller angular calices inter- 
spersed throughout ; the larger are one millimeter in diameter, 
the tubes gradually curving outwards to the narrow periphery, 
and then becoming almost horizontally inflected ; opercula 
not observed. Walls thin, but more or less thickened by a 
deposit of sclerenchyma. Septa obsolete. Pores very large, 
regular, round, usually forming a single row in the median 
line of each face of the corallites. Tabulas simple, complete, 
as fine liair-like lines, mostly horizontal, but at times a little 
arched upwards, and seldom oblique. 
Obs. — Favosites grandipora is by far the most representative 
fossil of the deposit. Its growth was certainly ramose, the 
largest stem observed being two and a quarter inches in 
diameter, but this was probably exceeded, as other examples, 
massive and non-ramose, and corresponding in macroscopic 
characters to the above, are probably only the interior portions 
of large stems. 
The remarkable size, regularity, and contiguity of the pores 
is a very prominent feature. Other uniserial forms of 
lavosites, as to the position of the pores, are known, but are 
chiefly Devonian in age, F. turbinata , Billings, F. hamiltonensis , 
Fomin ger, L. intella , "Winchell, Sec. The close serial arrange- 
ment of these large pores gives rise to a very peculiar 
appearance in longitudinal sections, when erosion of the 
coral lite wall has just commenced, and sufficient to render 
the pores partially confluent. The breaking up of the 
wall thus brought about simulates so many thick incomplete 
tabula?, after the manner of those of Favosites ( Emmonsia) 
hemispherical Yandell.* The pores are as conspicuous on the 
* Nicholson, Tab. Corals Pal. Period, 1879, t. 3, f. 36. 
