182 



PROCEEDINGS OF THE ACADEMY OF 



specimen which Heynemann (Mai. Blatt. 1862, pi. III., fig. 12) 

 describes with a ribbed jaw. Bergh (Zool. Bot. Gesell. in Wien, 

 XX. 833) suggests that Heynemann may have had Pallifero, 

 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 We.therbyi. (See Ann. Lye. 

 Nat. Hist, of N. Y., XI. 31.) 



The lingual membrane is arranged, as usual in the Helicinse, as 

 shown in fig. 25. It must be borne in mind that I ofter this 



Fia:. 35. 



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 

 pi. VI., fig 1. Morse counted 115 rows of 56 — 1 — 5G 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 of attachment. It is stout 



