266 The Ohio Naturalist [Vol. VIII, No. 4, 



usually is found smaller. The back (mantle) is whitish to pale 

 tan, or gra^^ish, "with clouds and spots of brownish and blackish 

 so arranged as to form three ill defined longitudinal bands." On 

 the variations of color, Binney has noted seven varieties, not 

 named, and it has been suggested, recently, that at least some of 

 them are probably distinct species. The question should be 

 settled by examining the jaw, radula, genital organs, etc. 



2. Ph. dorsalis Binney (Pallifera dorsalis, in Morse) is the 

 smallest known now, the animal attaining a length of only about 

 eighteen millimeters. Its color on the dorsal side is^gray with a 

 shade of blue, and a more or less interrupted dark median line. 

 It is probably distributed all over Ohio, but has been overlooked 

 or taken for the young of some other slug. 



3. Ph. sp. I collected two specimens in the woods east of 

 Chippewa Lake, the only ones known from Ohio. They were 30 

 millimeters long when extended, very slender, light tan colored 

 over the back, with very slight darker mottlings, the sole anteri- 

 orly with a tinge of blood red. The jaw and radula were differ- 

 ent from those of other species. Being possibly identical with 

 Ph. pennsylvanicus Pilsbry, they were left unnamed for the 

 present. 



4. Ph. sp. Of the same size as caroliniensis or rather some- 

 what larger. The body is less opaque, and the surface gyrations 

 are somewhat different. There is a series of irregular black 

 spots along each side, and small irregular white spots are scat- 

 tered over the whole mantle surface. Jaw and radula are dif- 

 ferent. Fifteen and twenty years ago, this was found rather 

 frequently in the vicinity of New Philadelphia, in company with 

 caroliniensis , and taken for one of the color varieties of the la,tter. 

 Both are more scarce now. Specimens carefully examined last 

 summer showed that they are of a distinct species, which will 

 doubtless be found in other parts of the state. It has been 

 named Ph. biseriatus. provisionally. 



5. Ph. wetherbyi W. G. Binney has not been '"ecorded from 

 Ohio; but known from Kentucky (Laurel Covnty), and also 

 from northern Michigan, it should be found within our limits. 

 It is rather small, with dark blotches in irregular transverse 

 bands or longitudinal series. The jaw and radula are different 

 from those of other species. 



Other forms, and species may be found, and it is unnecessary 

 to state that every specimen from any part of the state will be 

 of interest. 



