CYSTOPELTA, TEBENNOPHORUS. 227 



Hasselt in Yergleich mit der von Philomycus Rafinesque," W. 

 Keferstein, Mai. Blatt., xiii, 64. 



Subgenus PALLIFERA, Morse, 1864. 



Jaw strongly ribbed ; other characters same as in Tebenno- 

 phorus. The character of the jaw would remove Pallifera far 

 from Tebennophorus with which it is otherwise identical (PL 

 44, figs. 8, 9). 



Genus CYSTOPELTA, Tate, 1881. 



Body attached for half its length to the back of the foot; 

 mantle very large, enveloping the whole animal in repose, but from 

 beneath which the head and the tip of the tail alone are visible 

 from above, when the animal is crawling ; tail with a mucous 

 pore at the tip. No shell. Jaw ribbed, like Arion ; dentition 

 resembling Testacella. 



C. PETTERDI, Tate. Tasmania. 



An aberrant form combining the characters of Tebennophoridae 

 in the ample mantle and absence of the shell-plate, with the den- 

 tition of Testacellidse, and the jaw of Arionidae. 



Genus TEBENNOPHORUS, Binney, 1842. 

 T. CAROLINENSIS, Bosc. PL 56, fig. 1. 



Whitish or yellowish white, with clouds and spots of blackish 

 or brownish, so arranged as to form three ill-defined longitudinal 

 series, anastomosing more or less with each other, and having 

 smaller spots of the same color between them, inferior margin 

 white or yellowish ; foot whitish, extending a little beyond the 

 mantle posteriorly, showing a whitish flattened border; sur- 

 face of mantle covered with irregular vermiform, somewhat lon- 

 gitudinal anastomosing glands, with shallow furrows between, 

 lubricated with a watery mucus, and susceptible of contractions 

 which produce a slow, undulatory motion, like the flowing of 

 water, over the whole surface ; locomotive band not distinguished 

 from the lower surface of the foot. Length, 3-4 inches. 



Canada to Florida and Texas. 



Very inactive and sluggish in its motions, inhabiting forests, 



