| OCR Text |
Show 462 REV. A. H. COOKE O N [May 17, Amphidromus quadrasi, Hid. Peculiar. Lamprocystisgoniogyra, Mollf. Also occurs in Philippines generally. myops, Semp. & Dhrn. „ Philippines genera y. succinea, Pfr. „ Philippines generally. Trochonanina labuanensis, Pfr. „ Borneo. Hadra' monochroa, Sby. Also occurs in Palawan and Busuanga. Cochlostyla2 satyrus, Brod. „ Palawan and Busuanga. Cyclophorus triliratus, Pfr. „ Borneo. Opisthoporus quadrasi, Cr. Peculiar. Leptopoma insigne, Sby. Also occurs in Mindoro. maculatum, Lea. ,, Luzon. vitreum, Less. Also occurs in Java, Philippines, Moluccas. Quadrasia hidalgoi, Cr. Peculiar. Thus we find, even at the extreme Bornean end of this ridge, Philippine influence of considerable importance. The Bornean Amphidromi are counterbalanced by the Hadra, which belongs to the remarkable group of which the metropolis is Palawan, and by the single Cochlostyla. Opisthoporus, again, is Indo-Malay, while in the genus Leptopoma the preponderance, in species at any rate, is towards the Philippines. Quadrasia is a remarkable freshwater form, apparently allied to Planaxis, and quite peculiar to Balabac. The Mollusca known from Palawan are as follows:- Hemiplecta Schumacheriana, Pfr. Also occurs in Borneo. Hemitrichia (?) plateni, Dohrn. Peculiar. Euplecta cebuensis, Mollf. Also occurs in Philippines. Lamproeystis yoniogyra, Mollf. ,, Philippines. succinea,P fr. ,, Philippines. Trochonanina conicoides, Mete. „ Borneo, Bongao. Trochomorpha loocensis, Hid. „ Philippines. metcalfei, Pfr. „ Philippines, Borneo. splendens, Semp. „ Philippines. Amphidromus entobaptus, Dohrn. Peculiar, with Balabac. Hadra trailli, Pfr. Peculiar. 3 monochroa, Sby. Peculiar to Palawan, Balabac, and Busuanga. Eulotella (?) inquieta, Dohrn. Peculiar. fodiens, Pfr. Also occurs in Philippines. Cochlostyla 4 satyrus, Brod. Peculiar. Cyclotus euzonus, Dohrn. Peculiar. sordidus, Pfr. Said to occur in China and Cochin China. Opisthoporus quadrasi, Hid. Peculiar. 1 As lagunce). Hid. This variable species appears to be confined to Balabac, Palawan, and Busuanga; Hidalgo (Journ. de Conch, ser. 3, xxvii. p. 109) cites it also from Luzon, but I think this must be a mistake. 2 As the var. graellsi, Hid. 3 Including the varieties palawanica, Pfr., lagunce, Hid., dorice, Dohrn, and palumba, Souv. Cuming gives monochroa from Tablas, which I think is a mistake. Dohrn considers the occurrence of dorice in Borneo very doubtful. 4 Including the varieties graellsi, Hid., palavanensis, Pfr., and librosa, Pfr. |
