Xll 
INDEX. 
Order V.— HETEROPODA, 49 
Petrotrachea, 50 
Carinaria, 50 
Atlanta, 51 
Firola, 51 
Timorienna, 51 
Monophora, 51 
Phylliroe, 52 
Order VI.— PECTINIBRANCHIATA, 52 
Fam, 1, — Trochoida, 53 
Trochus, 53 
Tectarium, 53 
Calcar, 54 
Rotella, 54 
Cantharis, 54 
Infundibulum, 54 
Telescopium, 54 
Trochus, 54 
Solarium, 55 
Evomphalus, 55 
Turbo, 55 
Turbo proper, 55 
Delphinula, 55 
Pleurotoma, 56 
Turritella, 56 
Scalaria, 56 
' Cyclostoma, 57 
Valvata, 57 
Paludina, 58 
Littorina, 58 
Monodon, 58 
Phasianella, 59 
Ampullaria, 59 
Lanista, 59 
Helicina, 59 
Ampullina, 59 
Olygira, 59 
Melania, 60 . 
Rissoa, 60 
Melanopsis, 60 
Pirena, 60 
Actaeon, 61 
Pyramidella, 61 
Janthina, 61 
Nerita, 61 
Natica, 62 
Nerida proper, 62 
Velata, 62 
Neritina, 62 
Clithou, 62 
