BUBBLE - SHELL. 43 



lusks. Some of the latter may be caught at low 

 water, and they show very fine colors and paint- 

 ing. This species is named Tomatella punctoem- 

 lata, Cpr., and from its peculiar stripes is com- 

 monly called the Barrel-shell. It is about one 

 half an inch in length, oval, very few whorled, 

 with a fold on the columella, pure white, with 

 two series of fine, black, spiral bands. 



Bulla nebulosa, Gld., Clouded Bubble-shell, 

 Fig. 6, PI. XI, is a large, thin, globular shell, 

 abounding in southern waters. Its color is 

 brown, mottled with black and yellow clouds. 

 The spire is depressed, leaving a hole ; length, 

 (me to two inches. 



Ilaminea vesicula, Gld., White Bubble-shell, 

 resembles the last in form, but is smaller, nearly 

 white, very thin and delicate. This species 

 lives in slimy mud, and eats animal substances. 



With this shell we must take leave of the Gas- 

 teropods and turn our attention to the less 

 highly organized, but equally interesting La- 

 mellibranchs. 



