PHILOMYCIDAE 



133 



nating In a small enlargement bearing the eyes. The tentacles 

 are very short. 



This slug, found over northern and central Illinois, has not 

 vet been recorded from the extreme southern end of the state. 



The principal counties represented are Lawrence, Clark, Mc- 

 Lean and Carroll. Found in the same habitats as Philomycus, 

 it is often associated with that species. 



In most works on American MoUusca this species is placed 

 in the genus Tebennophorus or Philomycus. However, in 1864, 

 Professor E. S. Morse established the genus Pallifera, basing 

 it on the peculiar characteristics of the animal's ribbed jaw. 

 Pallifera is now a well established genus fully recognized by 

 systematic conchologists. 



PALLIFERA FOSTERI F. C. Baker, New Species 



The slug Pallifera fosteri is less than an inch in length 

 (20 mm.). It is of much the same form as Pallifera dorsalis, 

 but it is more humped in front and slightly longer in head and 



neck. It may be recognized by the blackish spots on a whitish 

 or flesh-colored mantle. These sp<3ts or blotches may form 

 interrupted, irregular longitudinal lines, especially near the base 

 of the mantle, or irregularly spaced clusters of small dotlike 

 spots scattered over the dorsal surface. In some specimens the 

 black spots form coalescing blotches elongated in form. 



This species appears to be confined to the southern and 

 central parts of Illinois, Vermilion, Monroe and Wayne counties 

 being represented. 



