[From THE ANNALS OF THE N. Y. ACADEMY OF SCIENCES, 
WO, Jl, IN@, IT] 
XXVIII.—On certain North American Species of Zonites, etc. 
BY W. G. BINNEY. 
(With Plates XIV and XV.) 
Read October 20th, 1879. 
Most of the following notes will serve as a supplement to 
“Terrestrial Mollusks and Shells of the United States,” vol. V. 
~The balance are furnished from specimens lately collected at 
Cape Town, South Africa, by Mr. J. 8. Gibbons. 
Spiraxis (Huspiraxis) Dunkeri, Pfr. 
San Domingo, Mr. J. 8. Gibbons. 
INO central teeth. (Pl. XV, Fig. N). 
Glandina, 
Mexico. Dr. Edward Palmer. 
On pi. XIV, fig. L, I have figured the lingual dentition. There 
are about 32-1-32 teeth. ‘The centrals are narrow, with a very 
slender cutting point. 
Rhytida vernicosa, Krauss. 
Cape Town, South Africa. Mr. J. 8. Gibbons. 
This species is placed by Von Martens in Ped/a, a subgenus 
of Helix. On examining the animal, however, I find it has no 
jaw, and that its lingual membrane presents the usual characters 
OL Rhytida. My. Gibbons informs me ‘‘that the animal wants 
the characteristic labial palpi of the latter genus.” There ap- 
pears no central tooth. The rows of teeth are close together, not 
widely separated. There are about 14-14 teeth (PL XIV, Fig. I). 
Sicnopus? decoloratus. 
Demerara. Mr. J. 8S. Gibbons. 
This species is allied to Zonites Cayennensis, Pir., of Cayenne, 
a species placed by Von Martens in Mesomphizx. An examina- 
tion of the jaw and lingual dentition leads me to consider it a 
Stenopus (see Morse, Ann. N. Y. Lye., viii, 158, fig. 3). I 
