Tf^RTULOSA. 185 



striatis, ultimo antice subapplanato, ad basiu acute carinato ; 

 apertura circular!, peristomate albido, inerassato ac reflexo, intus 

 ad basin ariguste canaliculato. Operculum normale. 



" Long. 11, diam. 4^, alt. apert. 4, diaui. apert. 34 mm.'' 



Nab. Ceylon. 



" This is the smallest species of the genus as yet described, it 

 is also composed ot" fewer whoi-ls, the last being pecuUarly some- 

 what fattened ; the sculpture is obsolete on the first three, just 

 discernible on the fourth and very distinct on the last two whorls ; 

 the notch at the base of the peristome is less conspicuous than in 

 the other species of the genus ; the shell is of a straw-colour, 

 irregularly marbled and streaked with greenish zigzag markings ; 

 the operculum is of a light horny texture, composed of about 

 6 whorls." {Nevill.) 



Var. caperata, Colldt. 



Cataulus nietneri, var. caperata, Collett, Juuru. Malac. vii, 1899, 

 p. HG, text-figure C ; Sykes, op. cit. xii, 1905, p. 55. 



'• Shell larger and more solid than the type. Whorls more 

 rounded and sutures deeper. Apex smooth and horny. The rest 

 of the shell closely and strongly wrinkled all over, excepting the 

 small flattened portion of the last whorl immediately above the 

 peristome. Operculum as in the type. 

 ♦' Alt. 18, diam. max. 7 mm." (CoUcU.) 

 Hah. Ceylon : Ambegamuwa and Balangoda {Collett). 



Var. unicolor, Collett. 



Cataulus nietneri, var. iiniculor, Collett, .Journ. Malac. vii, 1899, 

 p. 86, te.xt-tig. B ; Sykes, op. cit. xii, 1905, p. 55. 



" Shell larger and more elongated than the type. Whorls more 

 solid, more densely striated and more roughened. Apex golden 

 and horny. The rest of the shell very pale yellow throughout. 

 The conspicuous white flames which oi'nament the typical form 

 and var. caperala are entirely absent in the present Aariety, 

 which is rare. Operculum norn)al. 



" Alt. 17, diam. max. 6'5 mm." {Collett.) 



Hub. Ceylon : Ambegamuwa {Collett). 



267. Tortulosa prestoni, Sijkes. 



Cataulus prestoni, Sykes, Journ. Malac. xii, 1905, p. .oU, text-fig. 2. 



Original description : — " Shell nearly related to C. aureus, but 

 dift'ering in the following characters. Colour straw-yellow 

 rather than golden yellow ; size smaller ; whorls not so inflated ; 

 umbilical region more rounded ; lip not so produced at the base, 

 not so much reflected, and not so ' winged ' at the upper right 

 mai'gin ; canal smaller. 



"Alt. 10-8 : diam. max. (of last whorl) 8 millim."' {6'>^kes.) 



Ilab. Cevlon. 



