510 Dr. H. A. Nicholson and Mr. A. H. Foord on 



the autopores may be seen on well-preserved surfaces under the 

 microscope; tliey are small, occupying not more than about 

 one sixth of the circumference of the walls. A few autopores 

 have been drawn on an enlarged scale (PL XVI. fig. 2 a) to 

 show the folds. The latter become very obscure in sections 

 cut below the surface layers of the corallum, and they were 

 overlooked in the larger section (fig. 2). The autopores, as 

 shown in longitudinal sections (fig. 2 6), are crossed by tabulae, 

 Avhich are comparatively numerous, and are separated from each 

 other by variable spaces, measuring roughly from one to two 

 tube diameters. The inesopores are in this species remarkably 

 few in number, so that it frequently happens that only a single 

 row of them is interposed between two of the autopores. The 

 tabulse in the mesopores are unusually wide apart, and some- 

 times occur at the same level in contiguous tubes, which appear 

 at first sight to be separated by distinct walls. In other parts 

 of the corallum, however, the characteristic vesicular tabulaj 

 are met with. 



Ohs. This species was first described and figured in the 

 ' Polypiers Fossiles des Terrains Paleozoiques ' [loc. cit.). 

 The first notice of it, however, appeared in a list of Devonian 

 fossils from the district of Sabero (Leon) by M. de Yer- 

 neuil [he. cit.). The description of i^^si!!M^^}?ora Torrubicehj 

 the authors of the ' Polypiers Fossiles ' refers only to its 

 external characters. 



The species to which this is most nearly allied is Fistuli- 

 pora incrassata^ Nich. (Pal. Tab. Corals, p. 308, pi. xv. 

 figs. 3-3 5, 1879), from the Hamilton group (Devonian) of 

 Canada. The corallites in that species are, however, some- 

 what larger than those of F. Torruhice^ the mesopores less 

 numerous, and the folds of the autopores more strongly 

 developed. 



Formation and Locality. F. Torruhice is somewhat widely 

 distributed geographically, and is reported to have been found 

 in Devonian rocks at the following localities : — Asturias 

 (Spain), Eifel (Westphalia), Boulonnais &c. (France). 



Fistulipora Goldfussi^ Michelin, sp. 

 (PI. XVIT. figs. 2, 2 a, 2 b.) 



Ceriopora Goldfussi, Micheliu, Iconogr. Zoophyt. p. 190, pi. xlviii. 



fig. 9 (1847). 

 fChcsie/es Goldfussi, Quenstedt, Petref. Deutsclil. Abtlieil. i. p. 83, 



t. cxlvi. figs. 28, 29 (1878). 



Corallum ramose, hollow, subcyliudrical. Surface uneven, 

 irregularly dilated here and there. " Maculae" not very con- 

 spicuous. Corallites very minute ; about seven of the autopores 



