ARCA. 



Plate Species 



pertusa, Reeve V. 28 



pexata, Say IV. 22 



pilula, Reeve II. 8 



pulchella, Reeve XVII. 122 



quadrilatera, Sowerby I. 2 



radiata, Reeve VI. 40 



reversa, Gray I. 5 



rhombea, Born II. 12 



rotundicostata, Reeve VII. 46 



rufescens, Reeve VIII. 53 



scapha, Chemnitz IV. 25 



sculptilis, Reeve XVII . 118 



secticostata, Reeve VI. 38 



semitorta, Lamarck ... XIII. 89 



senilis, Linnceus VII. 45 



setigera, Reeve XIV. 94 



solids., Reeve XVI. 106 



striata, Reeve XVII. 121 



symmetrica, Reeve XVII. 117 



tenebrica, Reeve XVI. 105 



tenella, Reeve XIV. 91 



tetragona, Poll XV. 100 



tortuosa, Linnmus XIII. S6 



transversa, Say II. 13 



trapezia, Des/iayes (lobata, Ileeve) III. 19 



trapezina, Lamarck XV. 103 



truncata, Reeve XI. 74 



tuberculosa, Sowerby III. 18 



vmbonata ? Lamarck XI. 73 



velata, Reeve XII. 79 



vellicata, Reeve V. 33 



ventricosa, Lamarck XI. 73 



virescens, Reeve XV. 97 



volucris, Reeve XVI. 109 



zebra, Reeve XI. 69 



Zebuensis, Reeve XVII. 120 



Species 19. — Instead o/Arca lobata, Reeve, read Area trapezia, Deshayes, Magasin de Zoologie. 

 Species 87. — Instead of Area cuneata read Area cunealis. 



