402 
Plagioptychus, Math. III 
Plagiostoma, Sowb. III 
Plagiostyla, Fischer. II 
Planaria, Brown. . II 
Planaxide:. fae yi si 
Planaxis, Lamarck. II 
Planella, Schlutt. - II 
Planicirrus, Ryck. If 
Planispira, Beck. III 
Planogyra, Morse. III 
Planorbella, Gabb. . II 
Planorbella, Hald. 
Talanorbimees tea: |. UL 
Planorbis, Guettard. Ii] 
Planorbitina, Betta. Il 
Planorbula, Hald. Ii] 
Planulites, Montf.. II 
Planulites, Munster. IT 
Platidea, Costa. 
Platiris, Lea. 
Platyacra, Ammon. II 
Platyceras, Conr. . II 
Platycloster, Hasselt. IIT 
Platydoris, Bergh.. II 
Platygyra, Moreh... II 
Platymya, Agass. Itl 
Platyodon, Conrad. III 
Platyoptera, Conr. II 
Platyostoma, Conr. II 
i 6 II 
Platyphysa, Fisch. 
Platypleuroceras, Hy. II 
Platyschisma, M’Coy. II 
Platysuccinea, Ancey.III 
Platystoma, Hérnes. II 
Platystrophia, King. III 
Plebecula, Lowe. AE 
Plecotrema,H.& A.A. III 
Pleiodon, Conrad. . III 
Pleioptygma, Conr. II 
Plectambonites, Pan. III 
Plecticolimax. : 
Plectocheilus, Guild. IIT 
Plectodon, Carp. II 
Plectomya, Loriol. III 
66 6b III 
INDEX. 
PAGE 
200 | Plectrophorus, Fer. III 
288  Plectopylis, Benson. IIT 
263  Plectosolen, Conr.. III 
220 | Plectostoma, Ads... II 
246 | Plectostylus, Beck. III 
246 | Plectostylus,@onr. It 
273 | Plectoteuthis, Owen. II 
218 | Plectotropis, Albers, III 
45 | Plesiodiceras, M.-C. III 
29 | Plesiophysa, Fisch. . III 
94 | Plesioteuthis, Wagner. IT 
106 | Plesiothyris, Douv. III 
105 | Plesiotrochus, Fisch. II 
106 | Plethomytilus, Hall. III 
273 | Pleuratella, Moore. I1 
107 | Pleurobema, Rafin. III 
81. | Pleurobranchea, Mkl. II 
65 | Pleurobranchide. ._ II 
312 | Pleurobranchidium,Bl. II 
242 | Pleurobranchus, Cuv. II 
307 | Pleurocera, Raf. . II 
214 | Pleuroceras, Hyatt. II 
27 | Pleuroconcha, Conr. III 
374 | Pleurodesma, Hirnes. III 
248 | Pleurodon, Wood. . III 
150 | Pleurodonta, Fisch. III 
137 | Pleuroleura; Bersh., 11 
191 | Pleuroleuringe... 97 9Ei 
208 | Pleurolimnzea, Meek. III 
241 | Pleuromeris, Conr. III 
103 | Pleuromya, Agass. III 
76 | Pleuronautilus, Mojs. IIT 
218 | Pleuronectia, Swains. III 
58 | Pleuronotus, Hall... II 
220 | Pleurophorus, King. III 
328 | Pleurophyllidia, Meck. II 
43 | Pleurophyllidiine.. II 
94 | Pleuropus, Esch...) 2a 
242 | Pleuropus, Rafin. . II 
166 | Pleuropygia, Bronn. III 
331 | Pleuropyrgus, Mart. III 
19 | Pleurorhynchus, Ph. III 
52 | Pleurotoma, Lamarck. II 
139 < i Ill 
149 | Pleurotomaria, Defr: II 
150 | Pleurotomariide. . II 
