CONCHOLOGY. 29 



twisted, in clusters, and affixed to other substances. Inhabits the 



coast of Britain. Twenty-six species. 



Serpula vermicularis. Serpula filaria. 



S. fascicularis. S. pellucida. 



S. intestina. S. intorta. 



S. contortuplicata. S. cristata. 



S. plicaria. S. spirulaea. 



S. glomerata. S. quadrangularis. 



S. decussata. S, minima. 



S. protensa. S. echinata. 



S. infundibula. S. sulcata. 



S. annulata. S. costalis. 



S. cereola. S. dentifera. 



S. filograna. S. sipho. 



S. vermicella. S. arenaria. 



3. Genus Vermilia. PI. V. 



Animal. Body tubicular, elongated and attenuated towards the 

 posterior part, and provided superiorly with a simple testaceous 

 urbicular operculum. 



Shell. A testaceous cylindrical tube, narrowed in the rear, 

 twisted, and adhering by the side to marine substances, aperture 

 round, the margin armed with from one to three teeth. Inhabits 

 the British coast. Nine species. 



Vermilia rostrata. Vermilia subcrenata. 



V. triquetra. V. plicifera. 



V. bicarinata. V. scabra. 



V. eruca. V. taeniata. 



V. plicata. 



4. Genus Galeolaria. PI. V. 



Atdmal. Distinguished from the vermilia by a very peculiar 

 operculum. 



Shell. In groups, testaceous, cylindrical, subangular, wavy, 

 adhering by the base, and open at the summit ; aperture orbicular, 

 terminated on the side by a spatular tongue ; operculum orbicular, 

 3* 



