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Show 116 ME. to. A. SMITH ON LAND-SHELLS FBOM [Eeb. 5, 48. PTEEOCYCLOS LATILABBUM. (Plate III. figs. 23-25.) Testa P. tenuilabiato similis, sed spira minus depressa, umbilico profundiore, paulum contractiore, superflcie haud corrugata, labro latius expanso, opercido nucleum versus arctius convoluto. Hab. Gomanton Hill, N. Borneo. The very broad, thin, light brown or lilac-brown lip is in itself sufficient to distinguish this species. Most of the specimens are of a pale yellowish-olive tint, varied above with radiating jagged and zigzag red lines. Others, however, are of a deeper reddish-brown colour. The epidermis is smoother and more silky than that of P. tenuilabiatus, and the peculiar wrinkling of the surface of that species is entirely absent in the present form. ALYCJEUS. Ten species of this genus are now known from Borneo, namely- globosus, H. Ad., galbanus, Godwin-Austen, hosei, G.-A., everetti, G.-A., specus, G.-A., spiracellum, Adams & Reeve, broti, Aldrich, elohrni, Boettger (=hochstetteri, Martens non Pfeiffer), rimatus, Bttgr., and fultoni, Moellendorff. Of these, A. everetti and A. broti may be synonymous1; and A. fultoni has not yet been described, but the diagnosis (given on p. 117) has been kindly furnished by Dr. von Moellendorff. 49. ALYCEEUS GLOBOSUS, H. Adams. Alyceeus globosus, H. Ad. Proc. Zool. Soc. 1870, p. 794 ; Godwin- Austen, op. cit. 1889, p. 346, pi. xxxvii. figs. 3, 3 a. Hab. Busau and Bau, Sarawak (A. Everett). Var. MULUANA. Like the typical form, but having the peristome less produced into a tongue-like projection over the umbilicus. Hab. Mulu Mountain (A. Everett). Var. BABONGENSIS. A trifle larger and more globose than type, pale straw-colour or reddish; peristome as in var. muluana. Diam. maj. 5| millim., alt. 5g. Hab. Mount Rabong, Sarawak (A. Everett). Var. KINA-BALUANA. Not quite so globose as type; spire taller, aperture smaller ; peristome with even less production over the umbilicus than in the two preceding varieties : colour same as var. rabongensis. Hab. Kina Balu, N. Borneo (A. Everett). Var. PYGMJEA. Like var. muluana in miniature, but more coarsely and distantly lamellated, and with the peristome even less bent back over umbilicus. Diam. maj. 3| millim., alt. 31. Hab. Mulu Mountain. 1 Since this was written, specimens of A. everetti, sent by Mr. Fulton, have been compared by Mr. Aldrich with his A. broti, and he has written saying " they are the same thing." The diam. 7 m m . was a mistake, and should be "about 4^ mm." |
