239 PROCEEDINGS OF THE ACADEMY OF 
Suecinea lineata (pl. XV., fig. 11) has 26—1—26 teeth, with 4 
perfect laterals, but the transition to marginals is very gradual. 
The teeth have a very broad base of attachment, and very slender, 
sharp cutting points. 
Succinea avara (pl. XV., fig. 3) has 21—1—21 teeth, with about 
8 perfect laterals. Morse counted 19—1—19 teeth. 
Succinea obliqua (pl. XV., fig. 4) has 483—1—43 teeth, with 10 
perfect laterals. 
Succinea Totieniana is said by Morse, whose figure is given in 
L. and Frw. Shells, I., p. 267, to have 100 rows of 33—1—33 teeth. 
The bases of attachment are very narrow. 
Succinea campestris (pl. XV., fig. 10) has 18—1—18 teeth, 
with about 10 perfect laterals. Morse gives 50 rows of 30—1—30. 
The central tooth has a peculiarly narrow base of attachment, 
and avery greatly developed median cusp, the side cusps being | 
subobsolete. 
Succinea Nuttalliana (fig. 74). Teeth 19—1I—19. 
Fig. 74. 
Succinea effusa (pl. XV., fig. 6) has 15—1—15 teeth, with 10 
perfect laterals. 
Succinea Stretchiana (pl. XX., fig. 7). 16—1—16. 8 laterals. 
I have had no opportunity of examining the other species of 
Suecinea found within our limits. 
Family VERONICELLID&. 
Genus VERONICELLA Blainv. 
Jaw (fig. 75) low, wide, thick, slightly arcuate; ends but little 
attenuated, blunt; cutting margin without median 
crowded ribs, denticulating either margin, 24 in /. 
floridana. 
Jaw of 
Veronicella Lingual membrane, as seen in fig. 76, is arranged 
Fee ee aciaisualembtne Helicine, the transverse rows being 
projection; anterior surface with numerous, stouts 
