44 CTCI.OPHORTD.T. 



TheohaMius subplicatus, Kobelt & Mollendorflf, Naclir. Deuts.Malak. 

 Ges. xxix, 1897, p. 105 ; id., Cat. Pneum. 1899, p. 17 ; Kobelt, Das 

 Tierieich. Lief. 16, 1902, p. 96; id., Goncli.-Cab., Ovclophoiidae. 

 i, 1907, p. 563, pi. 70, figs. 13, 14. 



Original description: — " Sliell broadly iimbilicated, depressed, 

 solid, of a dark chestnut-brown and covered with a dusty fuscous 

 epidermis when young, closely striated obliquely and incon- 

 spicuously, spirally lirate, and ornamented witli oblique rather 

 inconspicuous scarcely raised folds or plications which are angled 

 above the region of the periphery on the lowest whorl and again 

 run backwards ; spire sligiitly elevated, apex obtuse, sutures 

 deep; whorls 4, convex, the last descending slightly towards the 

 peiistome; aperture oblique, subcircular, angled at its left apex ; 

 peristome double, both li[)s continuous, the inner white, the outer 

 scarcely expanded except at its left apex ; operculum of a single 

 horny thin layer, subconcave externally, with 6 spiral whorls : 

 diameter 1^^ inch [27 mm.], height |- inch [9-5 mm.].'' 



Hah. Ceylon : Haycock Mountain [Beddome). 



"Very like C. la>jurdi, but with the spiral lines much less 

 prominent and furnished with peculiar oblique folds, and the 

 peristome less reflexed." [Beddome.) 



65. Theobaldiiis thwaitesi, Pfeiffer. 



Cydophorus tlnvaitesi, Pfeiffer, Proc. Zonl. Soc. 1854, p. 127; Eeeve, 

 Conch. Icon. xiii. 1801, Cydophorus, pi. 18, fjo:. 87; Haulev & 

 Theobald, Conch. Ind. 1870, pi. 3, tig. 9 (not fig:" 8) ; 1876, p. *xv ; 

 H. Nevill, Enum. Helic. Pueum. Ceylon, 1871, p. 4: Jousseaume, 

 Mem. Soc. Zool. France, vii, 1894, p. 305. 



Myxodoma thwaitesii, Theobald, Cat. Shells Brit. India, 1876, 

 p. 37. 



Theobaldiiis tlmmitesi, Kobelt & Mollendorff, Nachr. Dents. Malak. 

 Ges. xxix, 1897, p. 105; id.. Cat. Pneum. 1899, p. 17; Kobelt, 

 Das Tierreich, Lief. 10, 1902, p. 96; id., Couch.-Cab., Cvclo- 

 phoridae, i, 1908, p. 699, pi. 70, figs. 4, o. 



Original description : — " C. testa late umbilicata, depressa, sub- 

 discoidea, tenui, subconfertim arcuato-striata, nitidula, luteo- 

 fulva, strigis angulosis castaneis eleganter flammata ; spira sub- 

 plana, vertice vix prominulo ; sutnra profunda ; anfr. 4, modice 

 convexis, celeriter acerescentibus, ultimo terete, antice vix descen- 

 dente ; apertura fere diagonali, ovali-rotundata ; intus submar- 

 garitacea ; perist. simplice, acuto, marginibus fere oontiguis, callo 

 tenui junctis, dextro expansiusculo, columelhiri subreflexo. 

 " Diam. raaj. 12, min. 9, alt. 5 mill." [Pfeiffer.) 

 Hah. Ceylon {Thwaites) ; Kimdy, GaWe (Simon). 



66. Theobaldiiis tristis, Blanford. 



Pterocydos ? tristis, Blanford, J. A. S. B. xxxviii, part 2, 1869, 

 p. 134, pi. 16, fig. 9 ; Theobald, Cat. Shells Brit. India, 1876, p. 38. 

 Cydopliorxis tristis, Hanley & Theobald, Conch. Ind. 1876, p. 57, 

 'pi. 143, figs. 5,6. 



