1 NPKX. 



295 



Naked Mollusks, 

 Natatory liobes, 

 Natatory Organ, 

 Neck, .... 

 Neozoic MoUusks 

 Nervous Sj-stem, 

 New Zealand Region, 

 Nidimental Capsules, 

 Nidimenta'l Glands 

 Nomenclature, . . 

 Nucleobranchiata, 

 Nucleus, . . . 

 Nudibranchiata, . 

 Odontoglossa, . . 

 Odontophore, . . 

 (Esophagus, . 

 Oigopsidse, . . . 

 Olfactory Organ, . 

 Ommatophore, 

 Opercular Mantle, 

 Operculum, . . . 

 Opisthobranchiata, 

 Order, .... 

 Organs of Sense, . 

 Otocyst, .... 

 Otolite, .... 

 Ovisac, .... 

 Palseontological Distrib 

 Palaeozoic Mollusks 

 Pallial Line, 

 Pallial Sinus, . 

 Palliobranchiata 

 Palpi, .... 

 Panamic Province 

 Pancreas, . . 

 Parasites, . • . 

 Parasitism, . . 

 Parietal Wall, . 

 Patagonian Province 

 Patagonian Region, 



Pearl, 



Pectinibrauchiata, 

 Pelecypoda, . . 



Pen, 



Pei'fo rated, . . . 

 Periostracum, . . 



114, 



15, 



25 



PAGE. 



15 

 07 

 14 

 9 

 235 

 70 

 196 

 119 

 111 

 247 

 82 

 45 

 82 

 255 

 94, 95, 97 

 93, 100 

 75 

 79 

 76 

 10 

 , 47 

 82 

 6 

 74 

 78 

 78 

 30 

 216 

 231 

 , 68 

 68 

 83 

 105 

 169 

 93 

 140 

 135 

 46 

 172 

 197 

 16 

 82 

 5 

 27 

 44 

 19 



56 



75, 



PAGB. 



Periphery, 45 



Peristome, 46 



Peritreme, 46 



Peruvian Province, . . . 170 

 Peruvian Region, .... 198 

 Philippine Region, . . .198 



Phlebenterata, 108 



Phosphorescence, .... 73 

 Phragmocone, .... 15, 30 

 Phragmostracum,. ... 30 



Phyllovora, 257 



Pleurae, 96 



Plug, 68, 110 



Polynesian Region, . . .195 



Polyzoa, 6 



Porifera, 2 



Preconchylian Gland, . . 132 

 Prices of Shells, .... 151 



Proboscis, 9, 93 



Pro-ostracum, 30 



Propodium, 65 



Protective Coloration, . .141 



Protozoa, 2 



Provinces, 154 



Ptehoglossa, 255 



Pteropoda, 4, 5 



Pulmonifera, 82 



Purple Gland, 107 



Rachidian Teeth, .... 96 

 Rachiglossa, . . . 255, 258 



Radula, 95 



Range of Families in Time, 241 

 Range of Genera in Time, 240 



Renal Organ, 103 



Respiration, 81 



Respiratory Cavity, ... 84 



Rest-period, 42 



Reversed Shells, . • . . 24 



Revolving, 47 



Rhinophore, . . . . 75, 79 

 Rhipidoglossata, .... 259 



Rhizochilus 21 



Rostrum, . 9, 28, 29, 30, 93 



Saddle, 34 



Salivary Glands, 92, 101, 105 

 Scaphopoda, 5 



