No. 22. BULLA. 



Dipper. Inhabitant a Slug. 



This shell is univalve, convoluted, and unarmed with teeth; somewhat 

 straightened, oblong, longitudinal, and very entire at the base; pillar less ob- 

 lique, and smooth. The arrangements of the Bulla family, among the old 

 writers on the subject, are very confused. Lister makes them a genus of the 

 Cowry; which one species, the Bulla Remicosa, much resembles. Grew and 

 Buonanori place it among the snails; Argenville and D'Avila, with the Coch- 

 lea Globosae; and Gaulteri, as a species between the Argonauta Argo and the 

 Cyprea. The term Bulla, implying the bubble-like form, was applied by 

 Rumphius to the Bulla Ampula, from whom it was adopted by Linnaeus as a 

 generic appellation. 



The animal of Bulla Lignaria is furnished with masticatory organs, con- 

 sisting of three testaceous bodies, placed within the stomach or gizzard, by 

 the help of which, it is enabled to break small shells and hard substances. 

 These latter named testaceous substances were first introduced as a new 

 genus by Gioenia, a Sicilian naturalist; after whom, it was named Gicenia, by 

 Brugiere. These organs are figured in the Linnsean transactions. 



The Dippers inhabit the sea, rivers, lakes and ditches. The texture of 

 most of the sorts is exceedingly thin. The marine kinds are found on shal- 

 lows, during the recess of the tide. 



DIVISION I. Shell resembling the Cyprcn genus, but toothed on the outer 



lip only. 



Scientific name. Locality. Scientific name. Locality. 



Ovum, Amboyna, India, China. Nucleus, Med., Africa. 



Imperialis, South Seas. Verucosa, Amboyna, China. 



DIVISION II. Shell oblong, beaked at the ends. 



American Seas, Jamaica. 



Mediterranean. 



Brazils. 



