ITALIAN GONIOPOR^. lOU 



Tlie specimen is chiefly interesting because at first sight it has the habit of a true Poritcs. 

 It is one of those Goniopores which are either really approaching Porites, or merely acquiring 

 a superficial resemblance (see Introduction, p. 21). 



86. (Joniopora Vicenza (i3)4. 



[Crosara, near Marostico (Oligocene).] 



Porites nummulitica, Reuss, Denksch. K. Ak. Wiss. Wien, .xxix. (18G9) p. 2.50. 



? Porites nummulitica, Reuss, Denksch. K. Ak. Wiss. Wien, xxiii. (1864) p. 28; and xxviii. (1868) 

 p. 164, etc. 



Description. — Corallum forms mounds 9 cm. across, rising often very high from broad 

 bases. 



The calicles are said to be 2-3 mm. across, shallow, and irregularly angular ; in other points 

 it is said to be exactly like specimens of the same " species " from the Oligocene at Oberburg 

 in Styria and Castel-Gomberto. 



As Reuss' work is always excellent, it is safe to call attention to the similarity said by him 

 to exist between specimens from these different localities. Yet I can hardly doubt but that 

 other differences could now be found, besides those admitted in growth-form and in the 

 sizes of the calicles. 



87. Goniopora Vicenza (i3)5. 

 [Ci-osara, near Marostico, Vicenza (Oligocene).] 

 Porites micrantha,'Reuss, Denksch. K. Ak. Wiss. Wien, xxix. (1869) p. 251, pi. xx\i. fig. 4 a, b. 



Descnption. — The corallum massive with convex but slightly wavy surface. 



Calicles 2 • 5-3 mm. across, polygonal and shallow. The walls are low, tliin, but with 

 blunt and irregularly granulated edges. 



Septa " 22-26," thin, very crowded, and so wavy and irregularly fused together as almost 

 to obscure the radial symmetry. The columellar tangle does not appear at the surface, and the 

 centre is occupied by the typical six pali surrounding a columellar tubercle. 



The waviness of the septa seen in this form occurs also in Goniopora Ohcrhtrg £', called by 

 Reuss Litharwa lobata. It is carried to an extreme in many of the Paris Basin fonns, 

 see Plates IX. and X. 



Reuss suggested that this miglit perhaps be allied %vith the " Astrcea microsidercea " Catullo,* 

 which D'Achiardi t claimed as Porites ; but CatuUo's figui-e seems to show a distinct groove 

 along the wall ridges which, though occasionally seen (PI. II. fig. 3) is not a characteristic of 

 the Poritida;, but is of many Astrsida?. As D'Acliiardi gives a different locality, he was 



• Terr. Sediment, sup. Venezie Antozoari, etc. 1856, p. 62, pi. xiii. 5 a, b. 

 t Coiall. Foss. Nummulit. Alp. Venete (Pisa 1867), 



