ANIMALS. 25 



sogar noch tiefer herab. Die Vertlieilung der Qiierlamellen, deren in der Mitte der 

 Lange etwa 24 vorhanden sind, ist nicht ganz regelraassig. In einem durchbrochenen 

 Exemplarc stehen die vier bis zur Axe laiifenden fast im Kreuz, und zwischen ilinen 

 fiinf oder sechs kleinere, welclie aiich ziemlich abwechselnd kleiner und grosser sind."i 



The beautiful specimen figured by Geinitz, and from which the above description 

 is taken, is conical, with the lower or pointed end slightly curved : the aperture is 

 very deep, occupying the upper half of the specimen, or more : externally it 

 is longitudinally striated, and transversely rugose. The plates, of which there are in all 

 about twenty-four, vary in length : there are four long plates dividing the Coral into as 

 many compartments, each of which contains five or six short ones. The specimen 

 measures about an inch and a half in length. 



The specimen represented in Plate III, fig. 2, is a broken cast ; but I am 

 enabled to make out some characters in addition to those given by Geinitz. The 

 original was of a conical form ; slightly curved ; with a deep cup, longitudinally 

 furrowed on its inner surface ; and several longitudinal plates of two lengths : the 

 longest, about five in number, reached half way to the centre ; the shortest are placed 

 between the others, in sets of from one to four, making in all about sixteen plates. 

 The cast shows, by means of a magnifier, that the lamellar interspaces were each 

 furnished with two very finely-denticulated, slightly prominent ridges ; but I have not 

 been able to satisfy myself of the existence of marginal denticles on the plates. 

 The Coral called by Count Miinster AntlLoplujllum venustum, from the St. Kassian beds, 

 offers a close resemblance to it. 



Petraia jorofu7ida\s,dL rare species. I have only succeeded in procuring two or three 

 specimens from the Shelly Magnesian Limestone at Humbleton Quarry. Geinitz states 

 its having been found in the lower Zechstein at Eisleben, Ilmenau, Gerbstedt, and 

 between Hettstiidt and Leimbach. 



Sub-order Alc yon aria, Audouin and Milne Edwards, 1836. 



ZoocouALLiA OcTACTiNEA, Ehreubery. 

 ZooPHYTAUTA, BlauivUle. 



Les Alcyoxiens, Audouin and Milne Edicards. 

 ZoopiiYTA AsTEROiDA, Johnston. 



The members of this order have several representatives on the coasts of Britain ; 

 but only one or two kinds, the Alcyonias (Dead Man's Hands), and Pennatulas (Sea-pens) 

 are anywhere common : some others, as Gorgonias (Sea-fans) and Primnoas (Sea- 

 shrubs), are but rarely met with; while the remainder, as the Tubiporas (Music-coral), 

 Coralliums (Red Coral), and some others, are only to be found in foreign seas. 



In the Alcyonarias, the body is usually of a cylindrical form ; the mouth is 



1 A'ersteinerungcii, p. 17. 



d 



