The Helicidae proper of the Philippines are still held in check, as in the greater part of the Indian region, by the Naninidae. The single _Trachia_ and _Plectotropis_, and the 2 species each of _Plectopylis_ and _Satsuma_, indicate affinities with Indo-China. Further important Indian relationships are seen in the great _Nanina_ and _Cyclophorus_, which here attain almost Indian dimensions; in _Kaliella_ (8 sp.), _Sitala_ (2), _Clausilia_ (1). Among the operculates we still have 1 _Alycaeus_ and 1 _Coptochilus_. Singularly enough, several Indian genera which occur here are not found in the intervening islands of Borneo, Sumatra, or Java, _e.g._ _Streptaxis_, _Hypselostoma_, _Ditropis_, _Acmella_, and _Cyathopoma_. The curiously tubed Malay operculates, _Opisthoporus_, etc., fail to reach the Philippines proper, although occurring in Borneo and N. Celebes; one of them reaches Palawan. The strikingly Malay genus _Amphidromus_ reaches Palawan, but no farther (1 sp.), while 2 species reach Mindanao, and one of these penetrates as far as Bohol and S. Leyte. Amongst the slugs, _Mariaella_ occurs again only in the Seychelles, and _Tennentia_ only in Ceylon. [Illustration: FIG. 212.--_Helix_ (_Obbina_) _rota_ Brod., Philippines.] _Land and Fresh-water Mollusca of the Philippines_ Streptaxis 1 Ennea 10 Mariaella 3 Tennentia 1 Helicarion 21 Vitrinopsis 5 Vitrinoidea 1 Rhysota 17 Trochonanina 2 Euplecta 28 Hemiplecta 11 Hemitrichia 15 Xesta 2 Macrochlamys 5 Microcystis 3 Lamprocystis 17 Bensonia 4 Vitriniconus 16 Sitala 2 Kaliella 8 Trochomorpha 21 Endodonta 1 Plectopylis 3 Plectotropis 1 Aulacospira 3 Pupisoma 1 Satsuma 2 Dorcasia 2 Chloritis 7 Obbina 19 Papuina 1 Phoenicobius 7 Cochlostyla 247 Amphidromus 2 Hapalus (?) 4 Hypselostoma 1 Pupa 4 Clausilia 1 Subulina 3 Prosopeas 2 Opeas 4 Geostilbia 1 Tornalellina 1 Succinea 3 Vaginula 2 Ancylus 1 Limnaea 3 Planorbis 3 Physa 2 Melania 50 Pirena 2 Bithynia 1 Vivipara 7 Ampullaria 5 Acmella 2 Diplommatina 41 Arinia 6 Pupina 5 Registoma 7 Hargreavesia 1 Callia 2 Pupinella 3 Helicomorpha 4 Coptochilus 1 Alycaeus 1 Leptopoma 42 Lagochilus 11 Cyclophorus 31 Ditropis 7 Cyathopoma 5