432 SPECIES OF THE SYSTEMA. 
as the representative of a shell declared to bear a close similitude 
to a subcancellated white Hmarginula (“ simillima precedenti” 
1.e. P. fissure). 
The Patella as it appeared in the tenth edition was far better 
defined, inasmuch as Klein’s drawing was the sole figure quoted 
in illustration, and harmonised correctly with the described 
features: hence the species may be said to have been pictorially 
defined in that publication. Now, the cited engraving of Klein 
was copied from Lister, Hist. Conch. pl. 527, f. 2 (and this re- 
ference has been added by Linneus in his revised copy), which 
represents either the I’. reticulata of our own shores, or a very 
closely-allied congener that I have received from Jamaica, and 
been unable to distinguish from our native examples. The 
reticulata, moreover, is found in the Mediterranean, and although 
correctness as to locality may be considered exceptional, not 
habitual, with our author, yet the name of the authority 
(Brander) for its habitat gives weight to the statement. 
Schréter’s ideal of the Linnean pustula (Einleit. Conch. pl. 5, 
f. 8) is not so unlike the shell delineated by Klein. 
Patella Graeca. 
As our author possessed this limpet, and only two shells in 
his entire collection, the isswrella neglecta of Deshayes (Sow. 
Conch. Ill. Fis. f. 30) and the ’. Greca of Lamarck, coincide 
with his description of it, it is manifest that the name pertains 
to one or other of them. The latter, a native of the West 
Indies, of which only a single individual is present in the 
cabinet, may possibly be regarded as the Greca of the twelfth 
edition of the ‘Systema,’ since most of the additional synonyms 
in that publication favour its claims; but the former, of which 
many examples have been preserved in the cabinet, was 
assuredly the species originally so named. For not only is it 
a native of the Mediterranean, as declared by Linneus, but of 
the four engravings referred to as illustrative no less than 
three represent it. Moreover, the term ‘‘convexa” (merely | 
convex, not conical) is far more appropriate for the depressed 
European limpet than for its elevated American congener ; 
