f64 



ZOOLOGY. 



irregularly tootlied : JjjexvecmYed^ pointed : **** 

 EyJire^ notpointed at the Apex : ^"^^'^^Apex perforated. 



Limpets abouEcl oa rocky coasts, and may be found in 

 great abundance^ adhering to rocks and stones ; the fresh 

 water species attach lliemselves to aquatic plants, they all 

 affix themselves so teiiaceously, that it is with difficulty they 

 are remored without injury. 



33. DentaUum» Tooth-Shell. Inhabitant a Terrehella, 



Shell nearly strait, slender, tubular, mostly pervious. Plate 

 5, fig. 33. 



These shells are all marine, they may be found on sandy 

 beaches at low water, generally in a perpendicular or oblique 

 direction, beneath the sand or mud, and are discoverable by 

 a slight depression on the surface. 



34. Serpula. Worm-Shell. Inhabitant a Terrebella. 



Shell slender, tubular^ usually adhering to other substances, 

 cften divided internally by imperforate partitions, at 

 irregular distances. Plate 5, fig. 34. There are two 

 families in the genus: * Fleucuous^ irregular in shape, 

 and adhering lo other gabstaiices : assuming a de- 

 termined form, and detached. 



Like the last ge:jas^ these are confined to the ccean^, and 

 are often found in considerable numbers^ attached to other 

 shells, stones, and plants. 



