TRIBE III. MADREPORACEA. 573 



are not subtubular, as the figures appear to represent. The species 

 referred to the genus are from the coral limestone at Caen. 



Lamouroux, Exp. Meth., 84, pi. 82, fig. I. Lamarck, 2d ed., ii., 318. 

 Blainville, Man., 409, pi. 67, fig. 5. 



APSENDESIA. LAMOUROUX. 



Pumilce. Corolla laminis aggregatis cristiformibus instructa, margine 

 cettiferis ; cellis minutis, poriformibus, subangulatis, irregulariter 

 sparsis. 



Quite small. Coralla consisting of aggregated crest-like plates, having 

 the margin celliferous ; cells minute, pore-like, subangular, irregu- 

 larly scattered. 



This genus was instituted by Lamouroux, and afterwards more cor- 

 rectly defined by Blainville. The species referred to the genus are 

 from the Jurassic and tertiary limestones. The structure of the A. 

 cerebriformis, as described by Milne Edwards, appears to be similar 

 to that of the Stenoporse. 



Lamouroux, Exp. Meth., 81, pi. 80, figs. Blainville, Man., 408, pi. 65, fig. 3. 

 12-14. Lamarck, 2d ed., ii., 289. 



PELAGIA. LICHENOPORA. 



The genus Pelagia, of Lamouroux, as more correctly described by Blainville, is a 

 free disk-shape zoophyte, smooth and low conical below, and having the upper surface 

 stellate, with small ridges or crests, which are covered above with minute subangular 

 cells. The only known species is a fossil half an inch in diameter. Blainville places 

 it near " Alveolites," and compares the upper surface to that of the Lichenoponc. 

 Whether it have or not the internal structure of the Favositidoc, is not ascertained. 



Lamouroux, Exp. Meth., pi. 79, figs. 5-7. Blainville, Man., 410, pi. 69, fig. 13. 

 Defrance, Diet, des Sci. Nat., t. 38. Lamarck, 3d ed., ii., 289. 



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