DESCRIPTIONS OF SPECIES. 197 



TUKBINOLIA INAURIS MortOD. 



1834:. TurhinoUa inavris Mortou. Synop. Org. Eem. Cret. Group, p. 81, pi. xv, 

 fig. 11. 



For discussion of this species see page 171. 



Trochocyathus sp. de Gregorio. 



1890. Trochocyathus sp. de Gregorio. Mon. de la Faune eocenique de I'Ala,, p. 256, 

 pi. xliv, figs. 10-11. 



"Tr. conoideus, curtis, dilatatus, septis erosis, lateribus, extus bifidis. 

 C'est line esp^ce tr^s douteuse, car je n'en possfede qu'un exemplaire trfes 

 usd"' 



Caryophyllia stjbdichotoma Lonsdale. 

 PI. XXII, fig. 22 (reproductiou from Lonsdale). 



1845. CaryophyUia subdichotoma Lonsdale. Quart. Jour. Geol. See. Lond., "Vol. I, 



p. 519, fig. 

 1860. CaryophyUia subdichotoma Milne-Edwards and Haime. Hist. Nat. des Corall., 



Vol. Ill, p. 123. 



The following is Lonsdale's description: 



Main stem cylindrical; branches numerous, short, slender, very divergent; outer 

 wall thin, porous, surface finely ribbed and furrowed; lamella) numerous, unequal, 

 very irregular near the periphery; center union of lamell*; branches produced by 

 subdivision of preexisting structures. 



The single specimen, a cast, was about an inch in height and 4 lines in diameter, 

 and consisted of a cylindrical stem (partially removed in the figure) with portions of 

 three branches. The main stem had been composed of luimerous lamella; partly 

 united in the center without any distinct structure, and greatly subdivided or reticu- 

 lated near the circumference. The original wall was apparently very thin except at 

 the divergence of the branches, and its general porous structure was proved by 

 transverse filiform i)rocesses, or their fractured extremities on the ridges representing 

 external furrows. The cast of the outer surlace exhibited also other signs of minute 

 foramina and reticulations. The branches were essentially composed at their com- 

 mencement of certain of the lamelhe of the parent steni, iucluding in the principal 

 example given in the figure some of those which composed the central portion of the 

 latter. The branches, however, differed from those of true Caryophyllia' in being of 

 limited dimensions, not ettecting a bifurcation; also in diverging laterally and sud- 

 denly, and in permitting the main stem to be continued perjiendicularly upward. In 

 this respect there was an agreement with the Dendrophyllia of De Blainville; but in 

 that genus the branches are not composed of previously existing lamella', being 

 developed from germs. The amount of extension outward of the branches was not 

 shown. 



