54 



POPULAR CONCHOLOGY. 



Division I. — Conchifera crassipeda.* 

 Shell gaping. 



This division contains four families, Tubi- 

 colidce, Pholadidce, Solenidce, and Myidce. 



Family 1. — Tubicolidce.-f 



These singular shells have at first sight no 

 appearance of being bivalves, the two valves 

 being small, and enclosed in a testaceous tube, 

 or encrusted entirely or partially in its sub- 

 stance ; they even sometimes project outwardly. 

 They bury themselves in stone, wood, sand, 

 and in other shells. — There are 6 genera. 



6. AsPERGiLLUM. — Shell, tube resembling 

 the spout of a watering-pot, being thicker at 

 one end than the other, the smaller one open, 

 and the larger one closed by a plate, which 

 is perforated with small holes ; valves situated 

 near the plate, outside the tube. Animal un- 

 known.^: — 5 species, recent. 



* Conchiferes crassipedes, Lamarck. Crassipeda, from 

 crassus, Lat., thick, and pedes, Lat., feet. 

 f Les Tubicolees, Lamarck. 



J M. Ruppel speaks of the animal of the species va- 

 giniferum, from the Red Sea. It appears greatly to re- 

 semble that of the Pholas. 



