CONCHOLOGY. 23 



CLASS III. 



CONCHIFERA. 



CONTAINS TWENTY FAMILIES. 



FAMILY I. 



TuBicoLA. Six genera. 



1. Aspergillum. The Watering-pot Shell. Four species. 

 A well-known but rare shell ; the larger end closed by a 

 convex disk, with numerous small perforations, and encircled 

 by a dilated margin of elegant papyraceous tubes, resembling 

 a beautifully plaited ruff; the smaller end open. Found in 

 sandy places at low water. 



Shell oval, slightly elongated, striated longitudinally, sub- 

 equilateral ; adhering, more or less confounded with the 

 coats of d rather thick calcareous tube, conic, club-shaped, 

 open at its attenuated extremity, and terminated at the other 

 by a convex disk pierced by a great number of sub-tubular, 

 rounded holes, and by a fissure in the centre. 



Aspergillum Javanum. Aspergillum Novae Zeylandise. 

 A. vaginiferum. A. agglutinans. 



A. Javanum. The Java Aspergillum. PI. 33, fig. 3. 

 Species smooth, in which the circumference of the disk is 

 bordered with a waved testaceous fringe. 



A. NovcB Zeylandi<^. The New-Zealand Aspergillum. 

 Species in which the circumference of the disk is without 

 a fringe. 



2. Clavagella. One species. 

 An irregular tube, with branches or projecting tubes at the 

 closed end ; within it is one free or moveable valve, united 



