T. ARENARIA. SABELLA. A. Mont. p. 532. Tube 

 extremely fragile, free, cylindrical, not tapering, com- 

 posed of pure sand, slightly cemented together, without 

 an internal membrane. Common on the Dorset coast, 

 about the thickness of a Ravens quill. 



T. SUBCYLINDRICA. SABELLA. S.Mont.p. 552. 



Tube long, subcylindrical, slender, fragile, not attached, 

 composed of fine sand and minute bits of broken shells, 

 cemented together on a fine membrane, adhering by 

 their flat sides. Diam. 0,10. Salcomb bar. 



T. SETIFORMIS SABELLA. S. Mont. p. 553. 

 Tube free, long, slender, gradually tapering to half its 

 diameter, composed of very fine fragments of shells and 

 minute flat bits of stone, agglutinated together at their 

 edges, lying on each other subimbricately, and standing 

 oblique towards the larger end. 3 or 4. diaxn. double 

 that of a hog's bristle. In sand, Salcomb Bar, Devon. 



T. CURTA. SABELI.A. C. Mont. p. 554. Tube 

 upright, affixed at the base to the shingles, near which 

 it is merely membraneceous and not covered as else- 

 where, by sand and miuute bits of flat stones or uniform 

 fine sand on a tough membrane ; diameter that of a crow 

 quill, slightly tapering. 1. Closely gregarious in the 

 inlet near Kingsbridge. 



T. COMPRESSA. SABELLA. C. Mont. p. 555. Tube 

 short, broad, and extremely flat, composed of large 



