E1STUL1PORA. 197 



of irregularly formed pores, but cell-mouths are almost entirely absent from the 

 reverse side, a feature which does not appear from our specimens, thouo-h it is 

 quite possible that it may exist. 



II. Family FISTULIPOEID^;, Ulrich, 1882. 



1. Genus FISTTJLIPORA, M'Coy, 1849. 

 1. FISTULIPORA? sp. Plate XXIII, figs. 17, 17 a. 



? 1841. MANON CEIBOSTTM, Phillips. Pal. Foss., p. 17, pi. ix, fig. 26. 

 1896. BERENICEA IKREGULARIS ?, Whidborne. Proc. Geol. Assoc., vol. xiv, 



p. 376. 



Description. Zoarium forming a very thin expansive layer, in which no signs 

 of attachment to other organisms have been discerned. Zocecia short, stout, 

 cylindrical, set perpendicularly to the face of the layer, divided by walls which, 

 though appreciably thick, are much thinner than the diameter of the cells, and 

 crowded together in such a way that irregular circular patterns may frequently 

 be traced in the mass. Ten zooecia occupying a distance of about 5 mm. Cell- 

 mouths possibly contracted. 



Size. A specimen is 40 mm. long and more than 10 mm. wide ; it seems 

 about 1 mm. thick. 



Localities. There is a specimen in the Porter Collection from Poleshill, and 

 another in my Collection from Saunton Hotel. 



Remarks. Of these fossils little can be said, except that they appear to be so 

 similar in pattern to Berenicea, irregularis, Lonsdale, 1 that it is possible that they 

 may prove to be akin. The same irregular arrangement appears to be observable 

 in the Silurian species. I have observed a very similar fossil in the Ilfracombe 

 beds. 



Whether they are the same as the very similar fossil which Phillips described 

 from these beds as Manon cribosum, Goldfuss, 3 I am uncertain, as his figure shows 

 a texture which, though much finer than that in Groldfuss's figure, is much coarser 

 than that of our specimens. As I have only seen these little fossils in the condition 

 of casts it has been quite impossible to arrive at their true character, and it therefore 

 seems best to leave them for the present in the genus Fistulipora, which was 

 formed by M'Coy " to include Manon cribosum, Goldfuss, and some new species." 

 One of our specimens shows vacant spots, which may, or may not, represent 

 monticules. 



1 1839, Murchison, 'Sil. Syst.,' p. 679, pi. xv, figs. 20, 20 a. 



2 1826, Goldfuss, 'Petref. Germ.,' vol. i, p. 3, pi. i, figs. 10 a, b. 



3 1855, M'Coy, 'Brit. Pal. Foss.,' p. 11. 



