[ 66 ] 
was a Spine, one may perceive the Shell perfo= 
rated. 
Among the Specimens of the Echini are the 
round Sea Eggs with beautiful Ranges of Tuber¬ 
cles ; the rounded flattifh Sea Eggs, with large 
Papillse, each fet round with fmall Tubercles; the 
oval, fiat, radiated, and undulated Sea Eggs with¬ 
out Spines •, many flat Placentae or Sea Cakts; and 
fome few of the Specimens yet retain their Spines,* 
by which may be feen the Manner of their Difpo- 
fition. 
Echinorum Radioli. Many Specimens of the 
Spines of the different Kinds of Echini preferved 
in their recent State as they drop from the Shell •, 
they differ in Length and Thicknefs, fome of them 
being* very fmall and fharp, others large and ob- 
tufe. 
Patella Limpet Shells; thefe are of a gibbous 
Shape, the Apex or Summit of the Shell is fome- 
times whole, at others perforated ; not unfre- 
quently fharp pointed, often obtufe: The .Fifh 
adheres very firmly to the Rocks, and is covered 
by one of thefe Shells: Some of the Specimens 
here preferved are very curious 5 many have cir¬ 
cular Ridges, others are radiated, and in fome 
half the Circumference is dentated, not unlike the 
Wheel of a Watch. They are chiefly found in the 
warmer Climates, particularly the Eajl Indies and 
South America. 
Awes Marina Sea Ears, commonly called the 
Ear Shell: This is of a broad and flattifh Figure 
inclining to oval, almoft fpiral at one Extremity, 
and has an Aperture almoft as large as the Shell, 
round the Edge of which are more or lei's perfora¬ 
tions, and the Marks of-others that do not go quite 
through the Shell \ the Fifh that inhabits it is a 
Limax: 
