540 



perfe6l flies to which they properly belong, andconfoli- 

 date their feveral hiftorics, which are now broken and 

 divided. 



Having laid thus much, we fliall, without further apo- 

 logy, proceed to the defcription of the feveral Sabcllce 

 which have occurred on our Ihores, together with fuch 

 of their animals as have come within our refearches. 



1. 



Alveolata. Sabella alveolata. Lin. Syji. p. 1268. 



Gmel Syji. p. 3749. 3. 

 Br. Zool t. 92. f. 162. 

 Turt. Lin. iv. p. 610. 

 Pult. Cat. Dorfet. p. 53. 

 Tubularia arenofa Anglica. Ellis Coral, p. 90. t, 36. 



S. with numerous tubes placed parallel to each other, 

 clofely joined, but not interfering; compofed of fine 

 fand and comminuted fliells, cemented together in an 

 aggregate mafs : the aperture of each tube is confidera- 

 bly expanded, and has fomewhat the appearance of a 

 honeycomb : the length of fome of thefe tubes near- 

 ly three inches. ^ 



This gregarious fpecics is not uncommon on many of 

 our fine fandv fliores, covering the funken rocks for a 

 confiderable fpace between high and low water-mark. 



Mr. 



