42S Fossils of the Chazy Limestone. 



about one tenth of a line in diameter. I am not sure that this 

 species should be referred to the genus Stenopora. It requires 

 further examination. 



Locality and formation. — Mingan Islands. Chazy limestone. 



Collectors — Sir W. E. Logan. J. Richardson. 



COLUMNARIA PARVA. (N".S.) 



Description. — This species occurs in large, globular, irregular, 

 pyriform or wide depressed convex masses with the corallites 

 about one third of a line in diameter. The interior of the tubes 

 do not in general exhibit any radiating septa, but when well pre- 

 served and weathered out, the septa are distinctly visible, usually 

 as more or less elevated vertical lines on the inner surface. In 

 some specimens or in different parts of the same, the septa being 

 more perfectly preserved, are seen extending nearly to the centre. 

 There appear to be eight or ten of them. The corallites are 

 generally five or six sided, and the size appears to be pretty uni- 

 form, at least it is so in all that I have seen. Some of the flat- 

 tened masses appear to have been more than one foot wide, and 

 often they have a thin stratified structure or are composed of suc- 

 cessive layers, the divisional planes between which divide the 

 corallites at right angles. There are three or four transverse septa 

 in one line. 



Locality and formation. — Mingan Islands. Chazy limestone. 



Collectors. — Sir W. E. Logan. J. Richardson. 



COLUMNARIA INCERTA. (N.S.) 



Fig. 1. Fig. 2. 



Fig. 1. — Columnaria incerta. End view of tubes. 

 2.— " « Side view. 



Description. — This species occurs in large globular or depressed 

 hemispherical masses composed of long slender cylindrical tubes 

 which are either in contact or separated less than their own width 

 from each other. These tubes are upon an average half a line 

 in diameter and wheu well preserved appear to consist of a sim- 

 ple wall without pores, radiating septa or transverse diaphragms. 

 The aspect of the species is remarkably like that of a Syringo- 



