PINNA. Pp 
rected by the words of the text “squamis patulis, acutis.” 
Schréter, Gmelin, and Dillwyn, who have wisely rejected the 
reference to Seba, and queried that to Lister, admit the species 
as determined by Chemnitz. Gmelin, moreover, in quoting 
Seba, cites the top figures (generally regarded as representa- 
tions of P. rudis) in place of the lower ones; the change, how- 
ever, is not for the better, since the delineated characters are 
equally at variance with those indicated in the description. 
Lamarck, who, in addition to the three original synonyms and 
the previously specified engravings of Knorr and Chemnitz (the 
latter stated to be inaccurate), has referred us likewise to a 
figure of P.pectinata! (Da Costa, Brit. Conch. pl. 16, f. 3), in his 
account of the ribs, has substituted “raris” for “ plurimis,” a 
change which is far too radical in its nature to be permitted, 
especially in a species where the data for arriving at a correct 
conclusion are so scanty as in the present one: he has omitted, 
likewise, all mention of the alternation of the costae. Upon 
the whole, it seems advisable to bestow the name of muricata 
upon the Chemnitzian species, referring the Linnean to it with 
a note of interrogation appended. 
Pinna votundata. 
Schréter, Gmelin, and Dillwyn have accepted the identifica- 
tion of this species by Chemnitz, who has delineated (Conch. 
Cab. vol. vii. pl. 93, f. 787) for the type of it a worn example 
of the Pinna squamosa. Now this shell, which is identical with 
the nobilis of Philippi and Lamarck, neither corresponds with 
our author’s brief description nor with the figure he has cited. 
Had Linnzus wished to indicate that bivalve, he would not 
have referred to plate 79 of Gualtier, but to platé 80, a trans- 
position which has been effected by the above-mentioned 
writers. Neither has he noticed the extreme size which that 
Mediterranean shell is wont to attaim, and the colouring is 
stated by him to be whitish instead of rufous. Even the lan- 
guage relative to the rounding off of the margin (the source 
of the name, and almost the sole ground for its appropriation 
to Pinna squamosa) is not “ margo ad apicem rotundatus,” as 
