194 UNIVALVES —_SERPULA. 
acute tip, and very much resembles a cork-screw. One 
of the most remarkable species is the S. anguina, 
which has a slit or jointed cleft along the spiral convo= 
lutions of the shell. The S. muricata has also a lon- 
gitudinal fissure, and is armed with short spines or 
prickles; it is usually of a rosy or pink color, and 
sometimes has its aperture margined. 
The well known but rare species the S. aquaria, forms 
the third division. The larger end of this shell is clos- 
ed by a convex disk, with numerous small perforations, 
and generally a longitudinal one in the middle; the 
whole encircled by a dilated margin of elegant pa- 
pyraceous tubes, resembling a beautifully plaited ruff or 
frill; the smaller end is open. 
The Indian, African, American, and Northern oceans, 
supply many species; as also the European, Mediter- 
ranean, Adriatic, and Red seas. 
Serpula is derived from Serpo, to creep, in reference 
to the vermiform character of some of the species. 
Diviston I.—Attached to other substances. 
Scientific Name. Locality. Common Name. 
Spirillum ------- Europe +++ +++ ++ ++ee ees Minute-spiral S. 
Triquetra --+-++« Ditto, America -------- Three-sided do -- 
Intricata -.++-- : Mediterranean, Britain-- Intricate -- do -- 
Corrugata «+++. Devonshire --+-++--+++ +» Wrinkled - do - 
Contortuplicata - Europe, Mediterranean-- Twisted -- do -- 
G@oreensis'eceesa-o (Goree Utes Baia. TAR Goree ---+- do -- 
Glomerata ------ European Seas -------++ Glomerated do - 
Conica ++++++--. America, Amboyna --+- Conical --- do «+ 
Vermicularis ---- Britain --+++-+++++++-+-- Round ---- do -- 
Tubularia ------ Devonshire .-.-.--+.+--- Tubular .-: do -- 
