THE NAUTILUS. 15 
Genus Lepyrium Dall. 
Shell neritiniform, small, thin, unicolorate; with a broad smooth- 
edged pillar lip; the operculum shaped like that of Neritina but 
without any calcareous layer or projecting processes ; the dentition 
comprising a very wide rhachidian tooth with a short finely denti- 
culate cusp, the median denticle hardly larger than the others and 
on each side of it a small obliquely set lateral, a broad major lateral 
with finely denticulate short cusp, and a short series of spatulate 
uncini much longer than the median teeth. Formula x.2.1.2.x. 
Type Lepyrium Showalteri (Lea, as Neritina), from rivers of the 
Appalachian drainage in Northeastern Alabama. Types, numbers 
29,016 and 102,851, U.S. Nat. Museum. 
The specimen from which the radula was obtained was very small 
and the radula so minute, and its long uncini so tangled, that it was 
impossible to make a complete description or enumeration of them. 
The rhipidoglossate character, however, was evident, and the form 
of the cusps of the middle part of the radula could be clearly seen. 
They differ from those of Neritina by having a very wide and short, 
finely denticulate rhachidian tooth, instead of a small quadrate one 
with simple edges; one instead of two oblique minor laterals; in 
the broad and simple quadrate form of the major lateral, and the 
relatively smaller number and larger size of the uncini. Anculosa 
has a tenioglossate radula with the formula 3.1.5, so it is evident 
that this form is not in any way related to Anculosa. 
The Oligocene of the Southern United States contains several 
species of Neritina, but none, so far as known, having a close resem- 
blance to Lepyrium; which is, however, probably an offshoot from 
Neritina. The fluviatile fauna of the Coosa region contains several 
unique or isolated types of mollusks and the present species adds 
another to the list. 
THE GOOSE FAIR BROOK. 
BY REV. HENRY W. WINKLEY. 
A curious brook, with an odd name, the origin of which I do not 
know. For some years this stream has formed the boundary be- 
tween the city of Saco and the town of Old Orchard. ‘The portion 
of it known to the writer is the last five or six miles of its course. 
