20 



CONCHOLOGIA CESTRICA. 



Station, among rotten wood, under loose bark, etc. 

 Chester County; common. 



JAnganl Dentition of T. Carolinensis. [B. & B.] 



Fig. 3. 



Sub-genus PALLIFERA, MORSE, 1864. 



Animal, in external characters, resembling Teben- 

 nophorus ; but differing in the form of the buccal plate, 

 and dentition, of the lingual membrane. 



P. dorsalis, BINN. 



Philomycus dorsalis, Binn., Proc. 



Fallifrra dorsaUs. ' 



[B.& B.] B ost Soct Nat Hist, 1841. 



Fig, 4, 



Cylindrical, attenuate, acute posteri- 

 orly, above obscurely elongate-rugose ; 

 ashy blue, with a black dorsal line ; tentacles blackish ; 



lingual membrane with 115 



Jarv of P. dorsalis. -[Morse.] rows> O f I I 3 teeth, each ; 56-!- 



56 ; buccal plate arcuate, with 

 costae strongly denticulating 

 the concave margin ; length 3^ 

 of an inch. 



