480 
ANNELIDES. 
Genus 14.— SILIQUARIA.— Lamar eh. 
Generic Character. —Body tubular, but not well known. 
Shell tubular, irregularly contorted, posteriorly attenuated, 
sometimes spiral at the base, and open at the exterior end, with 
a longitudinal, subarticulated slit, which continues its whole 
length. 
Siliquaria anguina .— The Snake-like Siliquaria. 
Plate XCII. fig. 24. 
Shell taper, undulating, with a longitudinal fissure \ spiral at 
the extremity. Inhabits the Indian seas. 
Genus 15.—ARENICOLA.— Lamarck. 
Generic Character .—With a soft, long, cylindrical, annulated 
body, posteriorly naked, having little bundles of bristles, set 
in a double series in the middle part; branchice external, either 
in tufts or branches, set in the middle part of the back, and 
under the fasciculi of bristles; mouth terminal, naked ; destitute 
of eyes. 
ORDER II.—ANTENNATiE. 
The head is antenniform, and provided with eyes; and having 
a projectile proboscis frequently furnished with jaws ; and seta¬ 
ceous papillae, which are pediform and retractile ; the branchiae 
are longitudinally disposed. 
Section I. — Branchiae arranged in the form of complicated 
tufts or leaflets, or ramose, constantly large and apparent; with¬ 
out spines. 
TRIBE I.-AMPHINOMiE. 
Branchiae and cirri placed above, beside all the pairs of 
papillae, which are foot-shaped; destitute of jaws. 
Genus 1.—EUPTIROSINE.— Lamarck. 
Generic Character. —Proboscis without folds ; one subulate 
antenna ; branchiae separated into seven ramose tufts, situated 
