XIX 



PECTINARIA. 

 Belgica, 5 (?). 



SABELLARIA. 



Alveolata, (e). 



Conchilega, 7. 

 Lumbricalis, 7. 

 Cirrhata, 7. 

 Arenaria, 8. 

 Subcylindrica, 8. 

 Setiformis, 8. 

 , 8. 



TEREBELLA. 



Chrysodon, 6. Compressa, 8. 



specimen described came from the N.W. coast of Ireland, 

 and was presented by its discoverer to Mr. Haniey, by 

 whom it was transferred to the valuable collection of W. 

 Metcalfe, Esq. 



(d) I received from Mr. Bean an arcuated and much 

 more tapering and slender variety, which perfectly agreed 

 with Muller's figure (Zool. Dan. t. 26, /. 2.) of the 

 sheath of his Amphitrite Auricoma. 



(e) There are two curious varieties ( ?) of this shell, the 

 first possessing the honeycomb appearance and parallel 

 tubes of the type, but constructed of coarser materials, is 

 usually termed S. CRASSISSIMA. The tubes of the other 

 have no regular arrangement, and their moutlis are devoid 

 of the usual patulous rim. It forms large banks at Mar- 

 gate and Ramsgate, and is the S. TUBULARIA of Chenu's 

 I llustrations Conchiliologiques. 



