28 PERMIAN FOSSILS. 



Calamopora MackrotJdi is rather a common Coral, being found at Tunstall Hill, 

 Humbleton Quarry, Dalton-le-Dale, Ryhope Field-House Farm, and Whitley, in the 

 Shelly Limestone. The German localities, according to Schlotheim and Geinitz, are 

 Milbitz and Corbusen, in the lower Zechstein ; and Glilcksbrunn and Liebenstein, in 

 the Zechstein-Dolomite. 



Genus Stenopora, Lonsdale. 

 CoEALLiOLiTEs, ScMotheim. 

 TuBULicLADiA, Lonsdole?- 



Diapiosis. — " A ramose, spherical, or amorphous tubular Polypidom ; tubes 

 polygonal or cylindrical, radiated from a centre or an imaginary axis, contracted at 

 irregular distances, but in planes parallel to the surface of the specimen ; tubular 

 mouths closed at final periods of growth ; ridge bounding the mouths, granulated or 

 tuberculated ; additional tubes interpolated."^ (Lonsdale.) 



This genus, founded on an Australian fossil Coral, the Stenopora Tasmaniensis, 

 Lonsdale, is stated to be " essentially composed of simple tubes variously aggregated 

 and radiating outwards. The mouth is round or oblong, and surrounded by projecting 

 walls, having along the crest a row of tubercles. The mouth, originally oval, is gradually 

 narrowed i^vtvoq) by a band projecting from the inner wall of the tube, and finally 

 closed."^ 



In a specimen of Stenopora Tasmaniensis given me by Mr. Morris, the tubes are 

 partitioned by transverse plates, with precisely the same varying character as those in 

 the tubes of the Northumberland Carboniferous Calamopora already noticed ; but there 

 is no appearance of mural foramina. 



Stenopora columnaris, ScJdotheim. Plate III, figs. 7, 8, and 9. 



CoRALLiOLiTES coLUMNAKis, Schlotheim. Tasclienbuch, p. .")9, 181.3. 



— — „ Akad. Miinch., vol. vi, p. 23, pi. iii, fig. 10, 1820. 



Stenopora incrustans, King. Catalogue, p. 6, 1848. 

 (?) Alveolites producti, Geinitz. Versteinerungen, p. 19, pi. vii, figs. 28-31, 1848. 



Diagnosis. — An incrusting Stenopora. Folypidoms tubular, cylindrical, slightly 

 wrinkled more or less transversely, and in close contact except towards their orifice, 

 w^here they are a little reduced in diameter, leaving rather wide interspaces, which are 

 often perforated with interpolated tubes. Apertures circular or slightly polygonal, with 

 a tuberculated margin. 



This species might easily be confounded with Calamopora MackrotJdi, but, leaving 

 out of view the want of transverse plates and its incrusting character, it has wider 



1 The name Tubulicladia, which is the earliest one, was rejected by Mr. Lonsdale for that of Stenopora, 

 - Strzelecki's Physical Description of IVew South Wales and Van Dicmen's Land, p. 2G2, 1845. 

 * Lonsdale, in Darwin's 'Geological Observations on the Volcanic Islands,' Appendix, p. IGI. 



