SPECIES INTRODUCED 



143 



bears a small ear-shaped shell near the posterior end of the 

 body. The body is subcylindrical, broad and rounded at the 



posterior end, tapering gradually toward the anterior end of the 

 animal. 



The surface of the body is roughened by small folds and 

 furrows. The eye peduncles are rather long and tapering, and 

 the eyes are located at the tip. The tentacles are very short. 

 The mantle is very small and is covered by the shell. The back 

 and sides of the animal are brownish or black, and the base 

 and sides of the foot are light yellow in color. The small, 

 chestnut-brown shell is approximately one-fourth inch (7 mm.) 



in length, ear-shaped and, in part, 



spiral. The excavated columellar 

 region of the shell is broad and 

 flat. The surface is roughened by 

 growth lines. The interior of the 

 shell is pearly white. 



This slug is rare in the United 

 States, and in Illinois it has been 

 recorded only from the greenhouses in Lincoln Park, Chicago, 

 where a few specimens have been found. It is a truly predacious 

 snail in its natural environment, feeding upon worms, other 

 moUusks and even upon members of its own species. It will 

 pursue an earthworm through its subterranean burrows with 

 the persistency and ferocity of a tiger. During the day, Testa- 

 cella europaea hides by burying itself in the ground, often to 

 a considerable depth. It is a common species in the southern 

 part of Europe. 



It is incorrectly recorded in this country as Testacella halio- 

 toidea or Testacella haliotidea Ferussac; another form of the 

 same name is applied in Europe to a much larger species, 3 to 

 5 inches (8-13 cm.) in length, known as Testacella haliot aides 

 Lamarck. 



