1086 SERPULA. 



generally in coral beds, and iucrusted with Millepora alci- 

 cornis. Pallas. 

 Shell about six inches long, and as broad as a little finger, tu- 

 bular, thick, and flexuose ; the tooth at the mouth is pro- 

 duced from an obsolete rib which runs along the whole shell ; 

 the surface is smooth, of a red, white, yellow, or violet co- 

 lour on the outside, and the aperture is yellow and striated 

 within. Pallas has given several figures, and a long de- 

 scription of the animal. 



