360 Binney’s Monograph of the Helices 
tridentata, Say, from which it differs in having the 
umbilicus closed, and the tooth on the pillat-lip long- 
er. Large individuals resemble in general appear- 
ance H. appressa, Say. The epidermis is sometimes 
_ delicately hirsute, and the aperture of a rose color. 
~The lip is occasionally destitute of one or both teeth. 
The name Hzix inflecta, by which it is universally 
known in the United States, and the description, 
"were published in 1821, by Mr. Say, more than a 
year before it was noticed by other naturalists, and 
several years before any other description appeared. - 
Lister’s om tab. 93. fig. 93, ~ mei 
this shell. - 
14. HELIX- MONODON. ' # 
; Plate X. fig. 1. 
H. testa convexiusculá, latè umbilicata, corneo-fuscescente, hispidu- 
lå, tenuissimé striata; aperturà semilunatà; labro albo, marginé an- 
sto, reflexo; dente unico, albo, longo, laminato, ad columellam : 
oblique pris regione umbilicali i impress i 
Synonyas AND. REFERENCES. 
Helix mónodon, Rackett. Trans. Lin. Soc. Lond., 
XHL AB. PL Vig, fur. 2.2 » 
Helix t Leti Ged. Ward. . Manuscript. 
Bilson. 
Animal.’ Yellowish brown, darker on the head, 
neck, and tentacule. Foot narrow, cylindrical, one 
and a half times as long as the diameter of the shell, 
terminating in'a point. Superior tentacule onè 
fourth of an inch long, eyes black. Some- c 
als much darker than others. - 
