VS 
T CAR d 
Yes 
A 
116 ^  . Couthouy’s Remarks on 
another, that it is constantly found, both in this genus 
and the Patella ; and that it should be adopted -as one 
of their generic characters. 
The “lingual ribbon,” as it i scent by the French 
naturalists, resembles a. narrow, flat chain, and has a 
metallic-lustre something like bronze. ` Its length, when, 
separated from the viscera, was nearly an inch, in an an- 
imal three-fourths of an inch long.. When thus detached, 
its appearance is that of a minute, compressed trachea, 
the segments ot which it is composed, resembling the 
cartilaginous rings of that organ. During life the animal 
keeps this appendage constantly in motion, upward and 
downward, at very regular intervals, in such a manner 
as to describe each time the arc. of a circle. Its purpose 
is doubtless for the trituration of food. 
I am enabled to state that the Patelloidez are ovipa- 
rous, having repeatedly witnessed the extrusion of the 
ova, which are nümerous, unconnected, very minute, 
nearly round, semi-transparent, and of a green color. 
Examined under a powerful microscope, a small, dark 
point was visible in the centre of each ; but no regular 
form, nor appearance of a shell could be discerned. As 
many as a couple of hundred were placed in a small 
box, having the ends covered only with fine gauze, and 
exposed in a situation where the tide flowed freely over 
them, for the purpose of ascertaining, if possible, the 
period requisite to bring them to maturity. At the ex- 
piration of a week, a very slight increase of size was 
perceptible, but still no distinct shape could be made 
out; and on my next visit to the spot, the box had been 
vid: As this point is yet in obscurity, both as re- 
gards this genus and the Patella, it is to be hoped that 
" s. 
Nr d Li 
