INVEETEBEATE ANIMALS IN PAL-^OZOIC KOCKS. 



605 



Fig. 9. — Radiating Burrow. Silurian ; Ontario, Canada. 

 (From a Photograph.) 



also otjcur in the Quebec Group at Metis, Canada, may possibly 

 have the character of mouths of large burrows with radiating trails, 

 though the radiating marks in this case seem to be of the nature of 

 vertical plates, rather than of grooves (see fig. 10), 



§ IV. Sabellaeites, gen. nov. (Figs. 11 & 12.) 



The modern genus Terebella, which constructs tubes of grains of 

 sand and fragments of shells attached to a membranous lining, has 

 been recognized by its tubes as low as the Lias (T. capilloides, Goldf.), 

 and I have ascertained the existence of similar tubes as low as the 

 Siluro-Cambrian ; though, as the tubes do not necessarily indicate 

 the precise affinities of the animal, I prefer to designate them by 

 the name above given, and to define this as indicating elongated 

 tubes composed of grains of sand and calcareous organic fl-agments, 



2x2 



