ANIMALS. 23 



about half way to the centre. Transverse plates horizontal, at irregular distances from 

 each otlier, and extending quite across the cavity. Chambers or lamellar interspaces 

 capacious compared with those of other Cyathophyllidias. Reproduction within the 

 polypiferous cup. 



" Type, Turbinolia Bonatiana, King, ' Catalogue of the Organic Remains of the 

 Permian Rocks of Northumberland and Durham,' p. 6. 



" This genus differs from most CyathopliyllidiB in its structural characters ; but it 

 appears to be nearest related to Cyathophyllum, taking as its type the (?) tri-areal 

 C. plicatum of Goldfuss, which is the first species described under the genus. (Vide 

 ' Petrefacta; pi. xv, fig. 12.)"^ 



It may be added, that the difference just alluded to consists in the absence, in 

 Calophyllum, of a distinct vesicular axis or central area, and a vesicular wall or outer 

 area. The genus is strictly uni-areal in its structure, possessing, in an unusually 

 developed form, merely the intermediate area of transverse and vertical plates found in 

 most of its associated genera. 



Calophyllum Donatianum, Kin^. Plate III, fig. 1. 



Turbinolia Donatiana, King. Catalogue, p. C, 1848. 



Diagnosis. — A Calophyllum : vermiform : gradually enlarging from the base 

 upwards : transversely wrinkled and longitudinally striated on the outside. Vertical 

 plates dense and somewhat apart from each other : primaries four ; secondaries 

 sixteen. Transverse plates horizontal, rather thick, and at irregular distances from 

 each other. Polypiferous cell shallow. 



This Coral bears a striking resemblance to Count Miinster's CyathopJiyllum radice- 

 forme (Beitriige, Heft 4, pi. ii), found in the calcareous Marl-beds of St. Kassian, in 

 the Tyrol. 



The specimen figured, which is the only one of the species known to me, was 

 procured at Humbleton Hill, in the upper bed of Shell-limestone. 



Petraia, Miinster.2 

 TuRBiNOLOPSis (fungites), PMlUps. 

 Cyatiiopuyllum (peofundum), Geinifz. 

 Streptoplasma, Hall. 



Diaynosis. — " Polyparium unattached, undivided, conical, deeply concave (hypo- 

 crateriform on the lamelliferous surface. Lamellse denticulated on the edges, plain 

 on the sides, alternately long and short. External surface more or less striated 

 longitudinally in correspondence with the lamellse, and marked b)' annular lines of 

 growth." (Phillips.) 



* Annals and Magazine of Natural History, 2d serieS: vol. iii, p. 388. 

 2 Beitrage, Heft i, p. 64. 



