CARBONIFEROUS FOSSILS OF IRELAND. 197 



GORGONIA LONSDALEIANA. M'Coy. (PL XXVIII. fig. 1). 



Sp. Cli. — Stem irregularly rounded, curved, or straight, rarely dichotomizing; pores irregular, projecting, 

 papillate. 



This very curious coral is of rare occurrence ; the cells for the polypi resemble warts, as in many of the 

 living species, but their margin is indistinct ; the external and internal portions of the branches are distinctly 

 visible in some specimens. 



GoRGONiA zic-zAC. M'Coy. (PI. XXVIIL fig. 2). 



Sp. CA.— Flabelliform, very much branched, reticulated; fenestrules irregular in size and shape, most fre- 

 quently nearly square, with rounded angles ; interstices thick, rounded, irregularly flexuous, forming a zig-zag 

 series of salient and re-entering angles ; dissepiments short, about half the diameter of the interstices ; axis 

 coarsely striated ; cortex finely granulated. 



The separation of cortex and axis is clearly discernible in some portions of the specimen. 



Jani/V. Lamouroux. 

 The few Corallines which I have noticed, as of this genus, should, probably, be removed to the vegetable 

 kingdom, but not having any other plants to describe, I have left them, for the present, in their old place 

 among the corals. 



Jania ANTiQUA. M'Coy. (PI. XX VL fig. 12). 



Sp. Ch. — Trichotomously branched ; branches slightly curved ; of equal diameter throughout their entire 

 length ; cylindrical, external crust thin. 



This curious coralline, in its trichotomous mode of branching, resembles the Corallince, but in general 

 habit, and in the branches being equally thick at both ends, it is more nearly related to the Amj/hirow, but has 

 not the disjoined branches of that genus. The cavity left by the shrinking of the internal, fleshy axis is very 

 large, leaving but a thin, external, calcareous crust. Length of branches about half an inch, diameter half a 

 line. 



JaNIA BACILLARIA. M'Coy. (Pl.XXVI.fig.il). 



Sp. Ch. — Dichotomous; branches very slender, cylindrical; suddenly dilated at the summit to a short, 

 conical figure, more than double the diameter of the stem. 



The lengthened, slender stems of the branches, with their suddenly dilated tip, resemble in form the an- 

 tique tobacco pipes so commonly found in our fields ; it is one of the most remarkable corallines of the carb. 

 series. Length of branches half an inch, diameter of stems one-third of a line, dilated summits one line. 



JA2JIA CRASSA. M'CoiJ. (PI. XXVIL fig. 4). 



Sp. Ch. — Irregularly dichotomous; branches thick, conical, short; slender at their origin, expanding ra- 

 pidly ; surface smooth. 



This is by much the largest species of this group I have seen ; it is common in the shales of several lo- 

 calities ; it most nearly resembles the J. hacillaria, M'Coy, from which it differs in the great thickness and 

 conical form of the branches. Length of specimens usually from one to two inches; length of branches about 

 three lines, diameter of branches at base usually about one line, at extremity one line and a half 



ViNCULARiA. De Fran. 



I have used this name here for those simply formed species, without lateral branches, and having more 

 than two rows of pores. I have not separated those specimens which have the pores all round, from those having 



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