16 



orifice expanded in the form of a cup. Tliey are unit- 

 ed together in one common mass, and composed of ag- 

 glutinated grains of sand and fragments of shells. 

 Sabellaria alveolata Sabellaria crassissima. 



m 



TEREBELLA. 



Encycl. Meth. p. 57, Jig. 5. 

 This is distinct from the Sabellaria, the animal be- 

 ing different. Tube lengthened, cylindrical, flatlened, 

 attenuated, and pointed at the base; of a membranous 

 texture, with adhesions of sand. 



Terebella conchilega Terebella cristata 

 Terebella ventricosa. 



AMPHITRITE. 



SABELLA PENICILLUS LinntBUS. 



This animal has no resemblance to the Sabella of Lin- 

 naeus. Tube elongated, cylindrical, becoming thin- 

 ner towards the base, of a tough membranous texture, 

 and most of them without adhesions. 

 Amphitrite ventilabrum Amphitrire vesiculosa 



penicillin volutaeornis 



magnifies infundibulum. 



