The Cambridge natural history . ll, which persists in the adult (Fig, 223), and in thisrespect the group appears to be related to Acavus (Ceylon, ) and Panda ( Australia). As is usual when Helix iswell developed, Nanina (about 12 sp.) is proportionately scanty. The African Bidimini {Pachnodus and Rachis) are repre-sented by tw^o species, but Achatina, so abundant on the main-land, is scarce. Two otlier groups of Ptdiminus, Leucotaeniaand Clavator, are peculiar. The presence of a single Kaliella,specifically identical with a common Indian form, is vervremarkable. Cydostoma proper, of

---

The Cambridge natural history . ll, which persists in the adult (Fig, 223), and in thisrespect the group appears to be related to Acavus (Ceylon, ) and Panda ( Australia). As is usual when Helix iswell developed, Nanina (about 12 sp.) is proportionately scanty. The African Bidimini {Pachnodus and Rachis) are repre-sented by tw^o species, but Achatina, so abundant on the main-land, is scarce. Two otlier groups of Ptdiminus, Leucotaeniaand Clavator, are peculiar. The presence of a single Kaliella,specifically identical with a common Indian form, is vervremarkable. Cydostoma proper, of which Madagascar is the metropolis,is richly developed (54 sp.). Many of the species are of greatsize and of striking beauty of ornamentation. Unlike its Heli-cidae, this genus is not restricted to Madagascar; several species MADAGASCAR occur on tlie mainland, 6 on the Comoros, one on the Seychelles,and 16 in Mauritiiis. The sub-genera Acroptychia and Hainesiaare peculiar. The fresh-water MoUusca of Madau;ascar contain further.

---

Size: 1163px × 2148px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: ., bookcentury1800, bookdecade1890, booksubjectzoology, bookyear1895