xir INDEX. 



ORDER VI. PECTINIBRANCHIATA (continued). 



Murex, 73 



Murex proper, 73 

 Brontis, 73 

 Typhis, 73 

 Chicoracea, 73 

 Aquilla, 73 

 Lotorium, 73 

 Tritonium, 74 

 Trophona, 74 

 Ranella, 74 



Apolles, 74 

 Fusus, 74 



Fusus proper, 74 

 Lathira, 74 

 Pleurotoma, 74 

 Pyrula, 75 



Fulgur, 75 

 Fasciolaria, 75 

 Turbinella, 75 

 Strombus, 75 



Strombus, 75 

 Pterocera, 76 

 Rostellaria, 76 

 Hippocrenes, 76 



ORDER VII. TUBULIBRANCHIAT A, 76 



Vermetus, 76 

 Magilus, 77 

 Siliquaria, 77 



ORDER VIII. SCUTIBRANCHIATA, 78 



Halyotis, 78 



Halyotis proper, 78 

 Pastollse, 78 

 Stromatia, 79 



Fissurella, 79 



Emarginula, 79 



ParmophoruB, 79 



ORDER IX. CYCLOBRANCHIATA, 80 



Patella, 80 

 Chiton, 80 



CLASS IV. ACEPHALA. 

 ORDER I. ACEPHALA TESTACEA,82 

 Fam. 1. OSTRACEA, 83 



Ostracita, 83 



