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Show 346 DR. O. F. VON MOELLENDORFF ON [June 5tj almost mucronate, the mouth much more protracted to the right, the upper parietal lamella much smaller and not, as in P. artata, covering the upper canal ; the outer margin of the peristome is more receding above, forming a decided, almost tooth-like angle before it recedes. All these differences are quite constant in the dozen of examples which I have examined and entitle the form to specific distinction. Judging from de Morgan's figure, they belong to the following species. 81. PUPINA TCHEHELENSIS, de Morgan. Pupina tchehelensis, de Morgan, Bull. p. 65, t. iii. fig. 4. Pupina artata, v. Molldff. 1. c. p. 314 (non Benson). Mt. Tchenel (de Morgan); Bukit Pondong (Hungerford). 82. CoPTOCHILUS SECTILABRUM, Gould. Perak (Townsend) ; Larut (coll. Ind. Mus.). Known from Penang, Tenasserim. 83. HYBOCYSTIS ELEPHAS, de Morgan. Hybocystis elephas, de Morgan, Le Nat. 1885, p. 70 ; Bull. p. 56, t. iii. fig. 1 : Fischer, J. de Conch. 1885, p. 174, t. x. (anat.) ; Crosse, ibid. p. 183, t. xi. ; v. Molldff. 1. c. p. 314. Valley of Perak river (de Morgan) ; Larut (coll. Ind. Mus.). Hybocystis jousseaumi, de Morgan (Le Nat. 1885, p. 70; Bull. p. 57, t. iii. fig. 2), from the same locality, appears to be based on smaller and dead specimens and is to be suppressed (cf. v. Molldff. 1. c. p. 315 ; Crosse, J. de Conch. 1887, p. 275). Fam. HYDROCENID.E. 84. GEORISSA MONTEROSATIANA, Godw.-Aust. & G. Nev. Georissa monterosatiana, Godw.-Aust. & G. Nev. P. Z. S. 1879, p. 738, t. lix. fig. 6 ; v. Molldff. 1. c. p. 316. Bukit Pondong (Townsend, Hungerford). 85. GEORISSA SEMISCULPTA, Godw.-Aust. & G. Nev. Georissa semisculpta, Godw.-Aust. & G. Nev. P. Z. S. 1879, p. 740, t. lix. figs. 3, 3 a. Bukit Pondong (Townsend). Fain, AMPULLARIID.E. 86. AMPULLARIA TURBINIS, Lea, var. SUBAMPULLACEA, G. Nev. Ampullaria turbinis, var. subampullacea, G. Nev. Handl. Moll. Ind. Mus. ii. 1884, p. 6. Ampullaria sumatrensis, de Morgan, Bull. p. 70. Perak (Townsend). Malay Peninsula generally (de Morgan). Ampullaria perakensis, de Morgan (1. c. p. 70, t. iv. fig. 12), and A. welleslegensis, de Morgan (1. c. p. 71, t. iv. fig. 13), are probably young shells. |