120 



ROYAL SOCIETY OF CANADA 



ANXI'XIDS. 



Trails and castings of wunns arc not int'roqiiont in the shales holding 

 the sponges. Some surfaces are covered wit h what seem to be very minute 

 cylindrical smooth trails of Avorms. and larger worm-like bodies in pyrite 

 seem to represent casts of Ijurrows or of the bodies of worms. Some of 

 these are a quarter of an inch in dianietcr and rudely anuulated in an 

 irregular manner. There are also a few casts in pyrite of spiral forms 

 liUe the Arcniceotitcs spiriiUs already mentioned. These burrows and 

 trails are similar to those found in various places at and near Little Metis 

 in the beds of the (Quebec Grou}). 



MISCELLANEOUS FEAGxMENTS. 



Minute fragments, possibh^ referable to Trilobites, Cystideans and 

 (jrraptolites. are occasionally seen, though verj' rarely, and tire quite 

 indeterminable. 



ALGiE. 



BUTHOTREPHIS I'ERGRACILTS, DaWSOn. 



(Fig. 32.) 



Fig. 'i'l. — Ii>i t hot rcpkis perr/racilis. 



I have nothing to add to the description of this species in the paper 

 of 1889, except that some of tlie specimens appear to be connected below 

 with a network of slender filaments spread out on the sluile, that some of 

 the specimens show indications of a structure of elongated cells or fibres, 

 and that at the extremities of some of the branches there are tufts of 

 rounded masses of granular pyritons matter ; but whether these are 



