ANNELIDES. 
477 
a terminal mouth ; tube elongated, cylindrical, tapering towards 
the base, membranous or coriaceous and generally naked. 
Amphitrite ventilabrum. — The Fan Amphitrite. 
Plate XCII. fig. 19. 
Tube tapering, incurved, and smooth; of a eream.yellow 
colour. Inhabits the Mediterranean sea. 
Genus 7. — TE REBELL A.— Lamarck. 
Generic Character. —Body tubular, elongated, cylindrically 
depressed, attenuated posteriorly, segments transverse, and sub- 
annulated ; having a row of nodulous and setiferous papillae on 
each side ; with numerous filiform, twisted tentacula surround¬ 
ing the mouth, and terminating in front of it; two rows of 
ramose branchiae placed in a single row beneath the tentacula; 
tube elongated, cylindrical, attenuated and pointed at the base, 
membranous, consisting of agglutinated grains of sand and 
fragments of shells. 
Terebella conchilega. — The Shelly Terebella. 
Plate XCII. fig. 21. 
Tube covered with numerous fragments of broken shells ag¬ 
glutinated together; with three branchiae on each side. Inha¬ 
bits the coasts of Holland. 
** With short branchiae; tentacula short or awanting. 
Genus 8. — S ABELL A RIA.— Lamarck. 
Generic Character. —Body tubular, subcylindrical, attenua¬ 
ted behind; with fasciculi of subulate bristles in a single row on 
each side, and spatulous bristles and transverse laminae, armed 
with hooked setae; anterior extremity obliquely truncated, ellip¬ 
tical, surmounted by six rows of brilliant spangles, three rows 
on either side; mouth elongated, cleft, with two lips, the 
under one short and interior; with small branchiae placed near 
the mouth ; tubes numerous, congregated in a common mass, 
composed of grains of sand and fragments of shells, with cup¬ 
shaped orifices. 
