MURICATED SERPULA. 
Generic Character. 
Animal resembling a Terebella. 
Shell univalve, tubular, adhering commonly to 
other substances, (in many species inter¬ 
cepted internally by dissepiments at uncer¬ 
tain distances.) 
Specific Character , &c. 
SERPULA with angular-muricated shell, with 
subarticulated longitudinal fissure. 
Rough Snake-Serpula. 
This shell, in its general shape, as well as in the 
longitudinal figure, composed of oval perforations, 
agrees with the Serpula anguina, represented in the 
preceding number of the present work; but differs 
in being strongly roughened or muricated with 
short, pointed protuberances. It is a native of the 
same seas with the Serpula anguina, and is repre¬ 
sented in its natural size. 
