RE 
Melania dermestoidea Lea, Séchelles,. 
— Duisabonis Grat., Madagascar. 
— ferruginea Lea, Zanzibar. 
— Mauriciæ Less. Maurice. 
— mitra Müesch. Maurice. 
— tubereulata Müll. Madagascar, 
Bourbon, Maurice, Comores, 
Séchelles. 
— Zanguebarensis Petit, Zanzibar. 
— Zengana Morlt. ibid. 
Pirena fluminea Gmel. Madagascar. 
— Lamarckiü Pot. et Mich. ibid. 
— Madagascariensis Grat. ibid. 
— sinuosa Phil. ibid. 
Navicella Cookii Récl. Comores. 
— porcellana L. Madagascar, Bour- 
bon, Maurice, Comores. 
— suhorbicularis Sow. Comores. 
Neritina auriculata Lamk. Madagas- 
car, Bourbon, Maurice. 
— Bengalensis Chemn. Madagascar. 
— brevispina Lamk. ibid. 
— Knorri Réel. ibid. 
— longispina Réel. Madagascar, 
Bourbon, Maurice. 
— Jugubris Lamk. Madagascar. 
— Madecassina Morlt. ibid. 
— Mauriciæ Less. Maurice. 
— pulligera Lamk. Madagascar. 
— Rangiana Réel. ibid. 
— Sandalina Réel. Madagascar. 
— semiconica Lamk. ibid. 
— spiniperda Morlt. ibid. 
— strigillata Lamk. Maurice. 
— turrita Chemn. Madagascar. 
— zigzag Lamk. Bourbon, Maurice. 
Unio Madagascariensis Sganz. Mada- 
€ 
(°] 
ascar. r: 
d 
Espèces douteuses. 
Arion extraneus Fér. Maurice. 
— Rangianus id. ibid. 
Vaginulus punctulatus Fér. Maurice. 
Parmacella Mauritius id- ibid. 
Succinea elongata id. ibid. 
Vitrina angularis id. ibid. 
Helix Alecto Beck, Madagascar. 
— Castor Fér. ibid. 
— delibata id. Bourbon. 
— nulla id, ibid. 
— turbida id. ibid. 
Bulimus sceptrum Beck, Madagascar. 
Pupa filosa Val. ibid. 
— inflata Beck, ibid. 
— iulus id. Maurice. 
Carychium gigas Fér. ibid. 
Auricula Borbonica Ziegl. Bourbon. 
— cancellata Fér. Madaggscar. 
— minuta id. ibid. 
Physa spiralis id. Bourbon. 
Neritina truncata Sganz. Bourbon, 
Maurice. 
Helix albidens Bens. — stylodon Pfr. 
— Brardiana Pfr. = similaris Fér. 
— Lightfooti Pfr. = odontina Morlt. 
— monodonta Grat. = stylodon Pfr. 
— mucronata Pfr. = philyrina Morlt. 
— Rawsonis Reeve, — semicerina 
Morlt. 
— stylodon Reeve, = leucostyla Pfr. 
— suffulta Bens. = odontina Morlt. 
Bulimus #arginatus Pfr. = Guillaini 
Petit. 
— teres Pfr. = contiguus Reeve. 
Achatina pallens Pfr. = simpularia 
Morlt. 
Pupa Largillierti Phil, = bicolor Hutt. 
— modiolinus Fér. —  clavulata 
Lamk. 
— palangula Fér. = teres Pfr. 
Cyclostoma Duisabonis Grat. — Ma- 
dagascariense Gray. 
— filosum Sow.= articulatum Gray. 
