Cl.VI. SABELLA. concrete-shell. 369 



ments of shells. The tubes sometimes above 

 three inches long. 



Found on the western coasts of Anglesey ; 

 near Criccaeth, Caernarvonshire; and near 

 Yan?wuih. It covers the rocks for a consider- 

 able space, near low- water mark. Tab. xcv. 



Lin. Syst. 1269. 



Mojit. Test. Br. 541. 



3. PENICIL- 



Amphi trite ventilabrum. 



Pallas Misc. Zool. t. JO. 



LUS. 



Gm. Lin. 3111. 



/•I. 





* S. shell membranaceous, erect, rooted; with 

 a long slender tube, tapering to the lower 

 extremity ; diameter at the top a quarter of an 

 inch; length six or seven inches. Animal, the 

 Amphitrite ventilabrum, p. 90. 



/ 



Lin. Syst. 1268. Pallas Misc. Zool. t. 9. 4. graxu- 



Mont. Test. Br. 5U. f. 3, 2. ? lata. 



* S. with a single shell, not attached to any 

 thing, simply bent, composed of brown grains 

 of sand ; length two or more inches ; diameter 

 at the largest end, three eighths of an inch. 

 Animal, an Amphitrite. 



VOL. IV. Q B 



