555 



12. 

 S. with a (liort, broad, and extremely flat tube, com- Compress a. 

 pofed of large pieces, or fragments, of flat bivalve fliells, 

 chiefly of the Peden genus ; thefe are laid without order, 

 but fometimes cover each other at the edges, and inva- 

 riably placed with the concave fide inwards, which leaves 

 a narrow perforation. 



The length of thofe we procured was about an inch 

 and a half, formed of five or fix fragments of fliells on 

 each fide, finely agglutinated together; thefe pieces are 

 in general three-eighths of an inch broad, and form a 

 moft Angular flruciure. Inhabits the deep at Torcrofs 

 in Devon/hire. 



The animal inhabitant has hitherto eluded our re- 

 fearches. 



ADDENDA. 



