364 ZOOPHYTES. 



Cespitose or fasciculate Cyathophyllidse ; stems cylindrical. Corallum 

 having the cells multiradiate ; internal septa simple, oblique up- 

 ward, conical, and extending quite from the sides ; axis distinct. 



The internal texture in this genus, as seen in a vertical section, is 

 quite open, without dissepiments, excepting the oblique septa which 

 occupy the whole interior, and appear like a series of inverted cones 

 traversed by a central axis (plate 20, fig. 11). The species are closely 

 related to the Columnarine : the principal difference consists in the 

 extension of the septa quite across the interior to the sides, and the 

 consequent absence of the exterior cellular texture; the septa more- 

 over are more regular and sometimes constitute each a simple plate. 

 The species have some resemblance to the Stylinse and Caryophyllise, 

 but differ in internal structure. 



This genus was instituted by Lamarck for a few unlike species, 

 characterized by consisting of parallel stems or tubes. The Madre- 

 pora organum of Linnseus, is the best determined, and appears entitled 

 to rank as the type of the genus, and has been so considered in this 

 place. The characters have been drawn from Fougt's and Schweig- 

 ger's figures, and from a specimen examined by the author. Other 

 cylindrical fossil species, similar in external habit, belong to the 

 genera Amplexus, Cyathophyllum, or some one of the preceding 

 groups. 



Fougt, Amcen, Acad. i. tab. 4, fig. 6, and ii. 340; Blainville, Man., 348; Goldfuss, 

 No. 1 ; Schweigger, Beobacht., pi. 7, fig. Petrefakten, p. 73. 

 66, and Handb., 419 ; Lamarck, 2d ed. 



FAMILY II. CARYOPHYLLID^. 



CaryophyUacea coralligena ; polyporum oribus longe exsertis, tentaculis 

 oUongis. Coratta penitus non transverse septata, et superfaie nun- 

 quam lameUo-striatis ; cellarum margine acutis et tenuibus; lamellis 

 fere integris. 



