CONCHOLOGY. : 3: 
FAMILY I. 
Tupicotra. Six Genera. 
1. Genus Aspergillum. Pl. V. 
Animal. Entirely unknown. 
Shell. Oval, somewhat elongated, striated longitudinally, conic, 
club-shaped, having two valves incrusted on one side of the club, 
open at its attenuated extremity, and terminated at the other by 
a convex disk, pierced by a number of small perforations, and 
encircled by a dilated margin of papyraceous tubes, resembling a 
plaited ruff—smaller extremity always open. ‘This is a well 
known, but rare shell, found in sandy places in low water in the 
Indian ocean, Four species. : 
Aspergillum Javanum. Aspergillum Nove Zelandie. 
A. vaginiferum. A. agglutinans. 
2. Genus Clavagella. Pl. VI. 
Animal. Unknown. 
Shell. A tubular sheath, testaceous, attenuated, and open before ; 
terminating posteriorly in an oval, sub-compressed club, roughened 
by spiniform tubes—one valve fixed in the side of the club, the 
other free in the tube. Inhabits the Indian seas. Four species. 
Clavagella aperta. Clavagella tibialis. 
C. cristata. C. Brocchii. 
3. Genus Fistulana. Pl. VI. 
Animal. Provided with two protuberant calcareous tubes, 
covering parts of its body at the open end of the tube, each of 
which is terminated with from five to eight cup-shaped calcareous 
or corneous appendages. It inhabits the sand, and perforates 
~ wood, stones, and sometimes shells. 
Shell. Lamarck asserts that the tube and shell of this genus 
are quite distinct. They have the shell free and detached within 
the sheath, and neither of the valves fixed into the partition of the 
tube, which is most generally testaccous, closed, and retort-shaped 
