182 PROCEEDINGS OF THE ACADEMY OF 
specimen which Heynemann (Mal. Blatt. 1862, pl. III., fig. 12) 
describes with a ribbed jaw. Bergh (Zool. Bot. Gesell. in Wien, ~ 
XX. 833) suggests that Heynemann may have had Pallifera 
dorsalis before him. Morch, Journ. de Conch. 1865, suggests that 
it may have been Veronicella Floridana. At all events I do not 
believe it could have been the species now under consideration. 
I suspect it to have been Pallifera Wetherbyt. (See Ann. Lye. 
Nat. Hist. of N. Y., XI. 31.) 
The lingual membrane is arranged, as usual in the Helicine, as 
shown in fig. 25. It must be borne in mind that I offer this 
T. Caroliniensis. (Morse.) 
figure simply to show the general arrangement of the teeth—the 
form of the individual teeth being much more accurately given in 
pl. VI., fig 1. Morse counted 115 rows of 56—1—56 teeth, another 
membrane gave 49—1—49 teeth, with 22 perfect laterals; I have 
myself counted 56—1—56 teeth, with 11 perfect laterals. The 
central teeth a@ have a very long narrow base of attachment 
widening towards the lower margin, which is excavated. There is 
a line of reinforcement running parallel to the lower edge, and for 
a short distance along the sides. The reflected portion equals 
only one-fourth of the length of the base ofattachment. It is stout 
