ASPERGILLUM. 



all others that we need not point out the differences ; all 

 our English collectors will know it by the name of the 

 Watering- Pot Shell, a name applied to it on aceount of the 

 resemblance of its larger extremity to the rose of a water- 

 ing pot. The few species that are known are occasionally 

 brought from Java^ New Holland, New Zealand and the 

 Red Sea ; we believe all the specimens that have been 

 collected have been picked up on the shore, and that it 

 has never been seen in its native situation. The smaller 

 termination of the species from Java has never come un- 

 der our examination. It will be seen that the species 

 from the Red Sea, which we have represented, increases, 

 probably periodically, in length at this smaller end, for it 

 sometimes has two, three or more reflected, undulated 

 fringes, surrounding the tube at unequal distances. Fos- 

 sil remains of this Genus are of ver}^ unusual occurrence ; 

 we have only seen fragments of one species from a bed, 

 resembling the Calcaire grossier of Paris, in the neighbour- 

 hood of Valognes, in Normandy, and casts of the inside 

 of another from a limestone forming part of the banks of 

 the Tagus, near Lisbon. 



Fig. 1 . Aspergillum vaginiferum^ Lam. from a specimen brought from the 

 Red Sea, by the Earl of Mountnonis, and presented by him to the 

 late Earl of Tankerville, from whose collection it has since passed 

 into that of the Rev. J. Goodall, Provost of Eton College This 

 figure shews the umbones of the two internal valves near the lower 

 extremity : it is diminished. 



2. A portion of the same, of the natural size. 



3. AsTpergiilum Javanicum, Lam. dissected to show the internal valves, 



and a portion of a coriaceous substance which arises from their edges, 

 and seems to form a lining to the principal tube. 



