58 MR. S. HANLEY ON THE LINNEAN MS. OF THE 'MUSEUM ULETC-E.' 



names had been appended to this, the three preceding, and the two fol- 

 lowing species. 



O. FASCiATA, Pec. radiis 20, auriculis sequalibus exoletis. 



The " gibba" of the borrowed diagnosis was not, it may be observed, in 

 the original. 



O. LIMA. Pec. radiis 22, imbricatis squamis, altero margine rotnndato, 

 auriculis obliteratis. 



The " gibba " of the borrowed heading was not in the original diagnosis. 

 The final remark was likewise absent. 



O. isoGNOMON. The entire account of this species was added to the 

 copy in the Linnean handwriting. " Klein, 128. t. 8. f. 15. Isognomon" 

 and " Cardo ut ephippo " had been omitted in printing. 



O. MALLEUS. O. trilobum. 



"Transverso ad marginem " was a subsequent addition. 



O. FOLIUM. O. ovatum, lateribus obtuse plicatura. 



Klein's copy (t. 8. f. 22.) of the indicated figure in Rumphius was cited, 

 in the handwriting of Linnaeus : " the " cavitate conica " was an emenda- 

 tion. 



O. EDULE. 0. subrotundum semiorbiculatum, valvula altera plana 

 integerrima. 



There was no semicolon after " opaca," but a comma after " latiore.'" 

 The original sole synonym was the omitted one of " Gualt. t. 102. f. B." 



O. SEMIAURITUM. O. semiauritum ovatum laeve, basi obliqua. 



Linnaeus himself had added this species to the earlier catalogue. 



O. EPHIPPIUM. 0. subniembranaceum curvum, cardine octosulcato. 



In addition to the published OstrecR, the following description of the 

 shell subsequently termed O. perna (Syst. ed. 12.) was found in the 

 manuscript : — 



O. rugosum, inaequale, tumidiusculum, cardine octocrenato. 



Testa perniformis, obovata, substantia ligni antiqui, tumidiuscula, super- 

 ficie obsolete rugosa, inaequali, interne livida. Cardo transversus, mar- 

 gine inflexo, notatus crenis obtusis circiter 8. 



ANOMIA. 



The single species here mentioned was compi-ehended in Ostreum, 



A. PLACENTA. O. orbiculatum planum pellucidum. 



Reference was made, by a long periphrasis, to plates 225, 226 of Lister's 

 ' Historiae ' ; Seba was not quoted : " intra discum testae adnatis " was 

 absent. 



MYTILUS. 



Testa opaca, laeviuscula. Cardo nullis dentibus instructus, sed fossula 

 obliqua intra marginem. 



This definition very properly excluded the oysters which had been erro- 

 neously inserted in this genus. Only the Mytili and Modioli of Lamarck 

 were left as members ; for margaritiferus and hirundo were transferred to 

 Ostreum ! ! 



