﻿208 Canadian Record of Science. 



" In layers of limestone still lower in the section an 

 obscure Stroniatoporoid form occurs in abundance, along 

 with fragments of a Trilobite and a Salterella." Small 

 specimens of these stromatoporoid forms were kindly 

 supplied to me by Dr. Walcott, and on being sliced, 

 though most of them were imperfectly preserved, one of 

 them exhibited the concentric laminae of Cryptozoon, and 

 the intermediate layers composed of microscopic grains 

 which were ascertained by Dr. Adams to be partly sili- 

 cious and partly calcareous (Dolomite and calcite). 

 Instead of the irregular curving canals of the typical 

 Cryptozoon, where best preserved they show ragged cells, 

 givino- off on all sides numerous small tortuous and 

 branching canals (Fig. 3), but this structure I regard as 

 possibly corresponding to that of Cryptozoon, and I 

 would therefore venture to name the species C. Occidentale, 

 in hope of the discovery of better specimens. 



II. Arch.eozoon. 



Still older specimens referable to the same general type 

 have been found by Dr. G. F. Matthew in the Upper 

 Laurentian (Grenville Series) of Southern New Brunswick. 

 Dr. Matthew having kindly presented a large slab of 

 these fossils to the Peter Eedpath Museum, I have been 

 enabled to study them both macroscopically and micro- 

 scopically. As described by Matthew, with reference to 

 their mode of occurrence in situ, they consist of cylindrical 

 or polygonal columns apparently multiplying by budding, 

 and composed of laminie and intermediate layers which 

 are convex upwards and are in places separated by spaces 

 occupied with calcite.^ The lamime have the same aspect 

 with those of Cryptozoon ; but the intervening thick 

 granular layers, which have a very uniform appearance, 



1 111 the ^slab presented to the Peter Redpatli Museum the individual masses are 

 apparently not in situ, but more or less broken and piled up together ; some of them 

 are six inches in diameter. The laminse of white calcite in several of the specimens I 

 regard as inorganic and filling lacunae or cavities. 



