212 PROCEEDINGS OF THE ACADEMY OF 
Alabama, Dr. E. R. Showalter (pl. XII., fig. 3). There are 
25—1—25 teeth, with 10 perfect laterals. 
Helix jejuna, not examined. 
Helix devia (pl. XII., fig. 4) has 23—1—23, with 16 perfect 
laterals. | 
Helix profunda (pl. XII., fig. 5) has 40—1—40 teeth, with 
about 14 perfect laterals. 
Helix Sayiit (pl. XI., fig. 5) has 42—1—42 teeth, with about 15 
perfect laterals. 
Subgenus ACANTHINULA. 
We have but one species within our limits, H. harpa, whose 
jaw and lingual dentition have heen described and figured by 
Morse. Judging from his figure (fig. 53) and text, 
the anterior surface of the jaw seems to have sub- 
obsolete ribs which mark the lower margin; it is 
low, wide, strongly arched, with blunt, scarcely 
Jamar attenuated ends; cutting edge with a wide and 
Helix harpa. z ; : 
[Morse.] very slightly produced, broad median projection ; 
transversely and longitudinally striate. 
Lingual membrane long and narrow, 120 rows of 17—1—1% 
teeth, with 6 perfect laterals. The centrals have a square base of 
Fig. 54. 
(om) fo Frama aie 
ban eeadel] 
ri t : , i iS a 
LA i ‘ | x f | | 
(ke aac cal 
Lingual dentition of Helix harpa. [Morse.] 
attachment, the upper margin squarely reflected ; the reflection is 
very small, tricuspid, the side cusps very small, blunt, the median 
cusps very long and narrow, not reaching the lower edge of the 
base of attachment, not even with its short cutting point; side 
cusps also, I presume, with cutting points, though none are shown 
in Morse’s figure. Laterals like the centrals, but unsymmetrical 
by the suppression of the inner side cusps, and cutting points. 
