MU HEX Bartonensis* 
TABc XXXIV .—Lower figures. 
Spec. Char. Shell oval, contracted close to the 
beak, strongly reticulated, whorls about four 
or five, the last about two-thirds the length of 
the shell. Mouth elongated, curved, acute at 
both ends ; right hand lip expanded, undulated, 
toothed within; left hand lip smooth at the 
edge, toothed within. 
Less than half an inch long; the mouth is twice as long 
as wide, elegantly curved into a small beak ; the outer lip 
has a furrow at about the fourth tooth from the beak, almost 
as much extended as the beak itself. The reticulation upon 
the surface is very square and sharply projecting; it is 
extended over the back of the lip, and forms its undulated 
edge. 
Two specimens given me some years ago by the Rev. 
Mr. Bingley differ a little in the undulations of the mouth ; 
I have given two magnified figures of one of them at the 
bottom of the plate. The small figure in the middle of the 
plate is the natural size ; it is from a specimen sent me by 
the discerning Miss Bennett; the furrows of the lip are 
not so distant in this.' Barton Cliff is the only place in 
which we know this shell to have been found. 
Murex Rana of Linn, a New Holland species, seems most 
nearly related to this. I suppose it would be placed under 
the genus Bufo by De Montfort. 
