134 TABULATE CORALS, 



Coenites juniperinus, Eichwald. 

 (PL VI, figs. 5, 5 V). 



C&nites juniperinus, Eichwald, Zool. Spec., vol. i. p. 179, 1829. 



Limaria clathrata, Lonsdale, in Murchison's Sil. Syst., p. 692, PI. XVI., bis, 



figs. 7, 7 a, 1839. 

 Coenites juniperinus, Milne-Edwards and Haime, Pol. Foss. des Terr. Pal., 



p. 301, 1851 ; and Brit. Foss. Corals, p. 276, PL LXV., figs. 4 and 4 a. 

 (Compare Limaria ramulosa, Hall, Pal. N.Y., vol. ii. p. 142, PL XXXIX., 



fig. 4, 1852.) 



Spec. Char. Corallum dendroid, of cylindrical dichotomous- 

 ly-dividing branches, the diameter of which is generally about 

 two lines. Corallites nearly vertical in the centre of the 

 branches, with thin walls, and about one-sixth of a line in 

 diameter ; gradually diverging in their upward course till they 

 reach a point from one quarter to half a line from the surface, 

 when they suddenly bend outwards, their walls being now 

 greatly thickened, and the visceral chamber reduced to a mere 

 slit. Calices fissure-like and elongated in the direction of the 

 transverse diameter of the branches, their long diameter about 

 one-third of a line ; the lower margin adorned with two pro- 

 minent teeth, while the upper margin carries a single tooth cor- 

 responding in position to the notch between the lower teeth. 

 Tabulae not very numerous, but well developed and complete. 

 Mural pores moderately numerous, circular, not excessively 

 large, irregularly distributed. 



Obs. This well-known Upper Silurian form is readily dis- 

 tinguished by the external characters of the cylindrical branches, 

 and the long, transversely-disposed toothed calices (PI. VI., 

 fig. 5), which are not elevated above the general surface. The 

 fissure-like calices are generally separated from one another, in 

 a vertical direction, by interspaces varying from about one-fifth 

 to one-third of a line ; and they thus appear as if sunk in a 

 compact smooth ccenenchyma. In longitudinal sections (PI. 

 VI., fig. 5 a) this apparent coenenchyma is shown to be due to 

 a deposit of sclerenchyma within the tube of each corallite in 



