*HBOBALDItJS.— CTCLOPHORUS. 45 



Cyclophorus (Theobaldius) tristis, Nevill, Hand List, i, 1878, p. ^76. 



Theobaldius tristis, Kobelt & Mijlleudorff, Nachr. Deuts. Malak. (Jes. 

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

 Tierreich, Lief. 16, 1902, p. 90; id., Concli.-Cab., Cvclophoridae, 

 i, 1908, p. 700, pi. 70, figs. 11, 12. 



Original description: — "Testa late uinbilicata, depressa, tenuis, 

 epidermide crassa, fulvesceiiti-bruiinea iiiduta ; sub epiderinide 

 albida, striatula. Spira convexa, apice paruui exserto, per-obtuso, 

 sutura profunda. Anfr. 5 robuiidati ; ultimus teres, longe sen- 

 sim descendeus. Aperttn-a obliqua, rotunda ; peristoma bre- 

 vissime aduatum, duplex; interiuim parum porrectum, superne 

 juxta suturam vix sinuatum ; externum leviter expansum, con- 

 tinuum, a peristoinate interno sulco discretum, supra ejus sinum 

 in alam verticalem parvam, instar tubuli imperfect!, antice spec- 

 tantem anfractum penultimum non attingentem, breviter cucul- 

 latim productum. Operc. ? Diam. maj. 19^, min. IB, axis 

 9^ mill. Ap. diam. intus 65. 



" Shell widely umbilicated, depressed, thin, covered with a 

 thick, olivaceous brown epidermis ; beneath the epidermis white, 

 faintly striated. The epidermis is closely rugately striated near 

 the suture. Spire convex ; apex scarcely exserted, obtuse ; suture 

 deep. Whorls 5, rounded, the last cylindrical, descending very 

 gradually for a considerable distance behind the aperture. Mouth 

 oblique, circular; peristome double, the two portions divided by a 

 groove ; the inner slightly projecting, with a very small, almost 

 obsolete sinus above, close to the suture ; the outer a little 

 expanded, and produced above into a short vertical wing, opening 

 in front, and forming an imperfect tube; it is just above the 

 imperfect sinus in tlie inner peristome, and does not touch the 

 penultimate whorl. Operculum unknown. Major diameter 0-8, 

 minor 0"62, axis U'36; diameter of the aperture 0"26 inch." 

 (^Blanford.^ 



Hab. India : South Canara, Tinnevell}^ (//. Beddonie). 



In the absence of the operculum the species was doubtfully 

 referred to the genus Fterocyclus by the author, but the sixb- 

 sequent discovery of specimens with the operculum led Hanley and 

 Theobald to refer it to Ci/clophorics, 



Genus CYCLOPHORUS, Montfort. 



Cyclophorus, Montfort, Conchvl. Syst. ii, 1810, p. 290; Pfeiffer, 

 Zeits. Malak. iv, 1847, p. 107 ; id., Mou. Pneum. 1852, p. 54 ; 

 Adams, Genera Rec. Moll, ii, 1855, p. 279 ; Fischer, Man. 

 Oonchvl. 1885, p. 74.'» ; Godwin-Austen, Land and Freshw. Moll. 

 Lidia/ii, 1897, p. 17; Sarasin, Land-Moll. Celebes, 1899, p. 32; 

 Kobelt, Das Tierreich, Lief. 16, 1902, p. 97. 



T5PE, Helix volvulus, Miiller. 



Range. South-Eastern Asia. Xew Guinea, Africa. 



Shell globose-turbinate, de|)ressed, or discoid; pei'istome 



