INDEX TO NEW GENERA AND SUBGENERA. 
17 
Pseudostromborrhinus, Heller , Ins. 
180 
Psoudotectus, Perner y Moll. 85 
Pseudotragus, Schlosser , Mamm. 43 
Pseudotruncatella, Andreae, Moll. 
81 
Pseudotylostoma, Ihering, Moll. 82 
Pseudotypotherium, Ameghino, 
Mamm. 49 
Pseustophylla, Peringuey , Ins. 154 
Psilochalcis, Kiefer y Ins. 231 
Psilocochlis, Dally Moll. 77 
Psilotrichus, Luzey Ins. 138 
Psodopsis, Warren, Ins. 283 
Psoralis, Mabille, Ins. 252 
Psorosina, Dyary Ins. 289 
Psychopliagus, Mayr , Ins. 231 
Pteroceropsis, Swinhoe, Ins. 263 
Pterygascidia, Sluiter , Tun. 7 
Ptilogonia, Bischofy Ins. 309 
Ptilophyllodromia, Bezziy Ins. 306 
Ptomatis, Clarke, Moll. 86 
Ptychocladia, Ulrich and Bassler , 
Bry. 17 
Ptychocynodon, Seeley, Rept. 33 
Ptychonema, Perner, Moll. 82 
Ptychorhytida, Kobelt , Moll. 62 
Purcellia, Hansen and Sorensen , 
Arachn. 37 
Pycnomma, Rutter , Pisces 32 
Pycnomutilla, Ashmead , Ins. 213 
Pycnotrochus, Perner , Moll. 85 
Pygceomorpha, Bethune- Baker, Ins. 
263 
Pyralophodon, Ameghino, Mamm. 50 
Pyrrhochalcia, Mabille, Ins. 252 
Quadrimetron, Popofsky, Prot. 52 
Quadrinervus, Cossmann , Moll. 78 
Quadristaurus, Popofsky, Prot. 52 
Quercetanus, Distant, ins. 323 
Radamellus, Raffray , Ins. 143 
Ragnar, Kirkaldy, Ins. 324 
Ramella, Schulze, Spong. 17 
Raphidocystis, Penard, Prot. 50 
Rathy motherium, A meghino, Mamm. 
50 
Rcedia, Ashmead, Ins. 213 
Regania, Jordan and Starks, Pisces 
40 
Rekoa, Kaye, Ins. 250 
Renicola, Cohn, Verm. 50 
Renifer, Pratt, Verm. 50 
Reuterista, Kirkaldy , Ins. 324 
Rhabdochseta, de Meijere , Ins. 311 
Rhabdoploca, Topsent, Spong. 25 
Rhabdospira, Perner, Moll. 80 
Rhacocassis, Spaeth, Ins. 198 
Rhamphixius, Fowler, Ins. 334 
Rheopresbe, Jordan and Starks, 
Pisces 29 
Rhinura, Warren, Ins. 284 
Rhodanomys, Depfret and Douxami, 
Mamm. 41 
Rhodomena, Warren , Ins. 284 
Rhombotrypa, Ulrich and Bassler, 
Bry. 13 
Rhopalithes, Grabau, Moll. 77 
Rhynchomesostoma, Luther , Verm. 
44 
Rhynchophalera, Aurivillius , Ins. 
263 
Rhypastus, Fairmaire, Ins. 180 
Ricuzenius, Jordan and Starks, 
Pisces 29 
Rihana, Distant , Ins. 331 
Robertsonella, Titus, Ins. 206 
Ropaliceschatus, Reuter, Ins. 328 
Rosetta, Popofsky, Prot. 52 
Rotellomphalus, Perner, Moll. 85 
Rozinante, Stebbing, Crust. 45 
Rulandus, Distant, Ins. 323 
Ruscula, Casey, Moll. 75 
Sabellicus, Distant, Ins. 328 
Sabljaria, Brusina, Moll. 66 
Saccoina, Dali and Bartsch , Moll. 
84 
Saccoploca, Warren, Ins. 284 
Sadaka, Distant, Ins. 331 
Salagosa, Raffray , Ins. 143 
Saprus, Blackburn, Ins. 152 
Sarcoborus, Oudemans , Arachn. 46 
Sarega, Mabille, Ins. 252 
Sargocentron, Fowler, Pisces 39 
Sarisophora, Meyrick , Ins. 296 
Sarostegia, Topsent, Spong. 17 
Sarotorna, Meyrick, Ins. 296 
Saycia, Sars, Crust. 49 
Sayiella, Ashmead, Ins. 231 
Scapanodon, Broom, Rept. 32 
Scaptocosa, Banks, Arachn. 35 
Scaridea, Jenkins, Pisces 34 
Scelidotheriops, Ameghino, Mamm. 
51 
Scenidiopis, Turner, Ins. 290 
Sclerothamnopsis, Wilson, Spong. 16 
Scliizanoplius, Cameron , Ins. 213 
Schizoblattina, Sellards, Ins. 126 
Scliizochirus, Waite, Pisces 28 
Schizocosa, Chamberlin, Arachn. 35 
Schlettereriella, Szepligeti , Ins. 225 
