Khumerspira, a new Genus of Bellerophontidae, and some Middle Permian Gastropods from Cambodia (Contributions to the Geology and Palaeontology of Cambodia, (Part4))

The Permian limestone in west Cambodia is well known for its yield of a rich fauna of marine invertebrates. The stratigraphical and paleontological studies of the Permian limestone have been published by D_EPRAT (1912, 1913), M_ANSUY (1913, 1914), G_UBLER (1935a, b), D_ELPEY (1941-1942), S_KINNER and W_ILDE (1954), S_AURIN (1959), V_IEN (1959), C_HI-T_HUAN (1961), F_ONTAINE (1961, 1965, 1967), S_ERRA (1966), I_SHII and N_OGAMI (1964), I_SHII (1966), and by I_SHII, K_ATO and N_AKAMURA (1969)....