Chiton discrepans, Bro. 

 Chiton Hanleyi, Bean. 

 Chiton cancellatus, G. B. Sow. 

 Chiton scabridus, y^^ 

 Chiton cinereus, L. 



Chiton cinereus, v Rissoi, Payr. 

 Chiton albus, Z. 

 Chiton marginatus, Fenn. 

 Chiton ruber, Loive. 



Chiton ruber, v oblonga, y^^ 

 Chiton l.^vis, Mo?tt. 



Chiton Icfivis, v navicula, Jeff. 

 Chiton marimoreus, Fabr. 



Order II.— PECTINIBRANCHIATA, Cuvier. 

 Family I.— PATELLID^E, Guilding. 

 Genus I.— Patella, List. 

 Patella vulgata, L. 



Patella vulgata, v elevata, Jeff. 



Patella vulgata, v picta, Jeff. 



Patella vulgata, v intermedia, Knapp. 



Patella vulgata, v depressa, Fenn. 



Patella vulgata, v c«3rulea, L. 



Genus II. — Helcion, De Mont. 

 Helcion pellucidum, L. 



Helcion pellucidum, v laevis, Femi. 



Helcion pellucidum, v elongata, Jeff. 

 Genus III.— Tectura, Ctiv. 

 Tectura testudinalis, Alrdl. 



Tectura testudinalis, v pallida, Verk. 

 Tectura virginea, MillL 



Tectura virginea, v conica, Jeff 



Tectura virginea, v lactea, Jeff. 

 Tectura fulva, Mull. 



Tectura fulva, v albula, yi?/! 



Tectura fulva, v expansa, Jeff. 



