SHELL-BEARING SII'UNt'ULUS. 



251 



SWUXCULID-E. 



SirUNCULACEJ]. 



Genus Si/punculus. Linnaeus. 



Generic Character. — Trunk cylindrical, long, having a circle of simple linear 

 tentacula near its extremity. 



SHELL-BEARING SIPUNCULUS. 



Sipimculus Bemhardus. Forbes. 



Specific Character. — Body smooth anteriorly, studded with small bristles 

 towards its obtuse posterior extremity ; trunk long, smooth, saving near the 

 extremity, where it is surrounded by four rows of minute bristles. 



Sipimculus Strombi, Montagu, Lin. Trans. VII. p. 74. Fleming, Brit. An. 



p. 491. Gray, Spicel. Zool. I). 

 D. Sipunculus DcntaUi, Gray, Spicel. Zool. 8. 



The form of the tentacula and the general habit of the 

 animals, distinguish the genus Sipunculus from Syrinx. 



