198 ON MOLLUSCA OF THE “ SKEAT EXPEDITION.” | Mar. 3, 
Atyca{us DIPLOCHILUS Moellendorff. 
Alyceus diplochilus Moellendorft, J. As. Soc. Bengal, vol. lv. 
pt. 2, 1886, p. 313; Proc. Zool. Soc. 1891, p. 342, pl. xxx. fig. 8. 
Hab. Cave near Biserat, Jalor. 
ALYCHUS CONFORMIS Fulton. 
Alyceus conformis Fulton, Ann. Nat. Hist. ser. 7, vol. 1x. 1902, 
p. 68. 
Hab. Kwala Aring, Kelantan. 
ALYCHUS PERAKENSIS Crosse. 
Alyceus perakensis Crosse, J. Conchyl. vol. xxvii. 1879, p. 206, 
pl. xii. fig. 7. 
Hab. Biserat, Jalor, amongst rocks. 
OPISTHOSTOMA ANNANDALEI, sp. nov. (Plate XX. figs. 4, 5.) 
Testa conico-pyramidalis, perforata, pallide rufescens, spira bene 
elevata, apice obtuso; anfr. 7, conveai, primi leves, reliqui 
distante lamellati, ultimus constrictus, retroversus, ascendens, 
conspicue solutus ; apertura rotundata, peristomate leviter 
incrassato. Alt. 2°2; diam. max. 2°8; diam. min. 1°6 millim. 
Hab. Jalor. 
A single specimen, found by Mr. Annandale in débris on the 
floor of a cave. Related to O. laidlawi Sykes, from Kelantan, but 
the present species is larger, and the spire is much more produced, 
thus becoming more cylindrical in appearance. 
DIPLOMMATINA SKEATI, sp. nov. (Plate XX. fig. 3.) 
Testa sinistrorsa, vix rimata, ovato-fusiformis, aurantio-rufa, 
solidiuscula ; anfr. 64, conveat, primi leves, reliqui costulis 
parvis subremotis regulariter sculpti ; sutwra bene impressa ; 
apertura fere circularis, peristomate incrassatulo, bene reflexo, 
subalato ; lamella columellaris parva. Alt. 3:1; diam. max. 
1:9 millim. 
Hab. Gunong Inas, Perak, at about 5000 feet. 
Only a single specimen of the shell, the most salient features of 
which are the inflated whorls, deeply cut suture, and fine, regular 
costulations. 
DIPLOMMATINA LAIDLAWI, sp. nov. (Plate XX. fig. 16.) 
Testa sinistrorsa, rimata, ovato-fusiformis, corneo-albida, apice 
rubello ; anfr. 54, convext, primi leves, reliqui costulis parvis 
remotis regulariter sculpti, interstitiis sub lente dense spiraliter 
striatis; apertura quadrato-circularis, peristomate duplica, 
expanso, margine columellari sinwato, subalato; lamella 
columellaris minima, indistincta. Alt. 2; diam. maz. 
1 millim. 
Hab. Gunong Inas, 3000-4500 feet, Perak. 
Found “ on the under surface of dead leaves, young with adults.” 
