180 SABELLA. 



the shape and dimensions of the tube, being an inverted conic frustrum, 

 result from the successive growth of the body. 



The animal is very timid. It dwells in deep water, lying apparently 

 in a horizontal position on the bottom of the sea. When taken, the body 

 is generally plump and fleshy ; but I have not found it easily preserved, 

 from not being vigorous at first. 



The tubes of all the specimens occurring to me were regular cones, 

 except in one instance, where it was slightly curved, like the tusk of an 

 elephant. 



Found among the Shetland Islands, and in various parts of the 

 Scotish seas. 



On the whole this animal has more correspondence with the nature 

 of the Terebella than with any other. 



PLATE XXV. SABELLA. 

 FIG. 5. Sabella belgica. 



6. Posterior extremity, with the scoop. 



7. Tube of fig, 9. 



8. Portion of the tube, shewing the arrangement of the grains of sand, 



enlarged. 



9. Sabella belgica* another specimen. 



