308 CLA.FSILIID.E. 



fold, following the winding of the columella and together with the 

 subcolumellar fold forms a groove somewhat wider towards the 

 base into which the clausilium slides when pushed to one side 

 by the animal's extrusion. The pedicle of the clausilium rises 

 about the beginning of the penultimate whorl. The upper 

 parietal fold rises nearly one quarter of a whorl lower than the 

 subcolumellar fold and becomes a broad fold at once. The 

 palatal plica3 1 find are not quite as described by Stoliczka, there 



Fig. 105. Clausilia waageni. 

 (Showing inside of last whorl with the palatal plicae.) 



being no true lunella, although, looking from the outside, it some- 

 what resembles one. The upper plica is, as usual, long and runs 

 parallel with the suture ; the second plica is short and parallel 

 with the upper; between them occurs a short denticle almost 

 uniting them, and from the anterior termination of the second 

 plica a nearly vertical plica runs down, forming a right angle, 

 with a slight oblique support posteriorly from its free lower 

 extremity and terminating close to the subcolumellar fold near 

 the aperture. Fig. 105 shows the inner side of the last whorl 

 with the palatal plicae in situ. 



272. Clausilia ios, Benson. 



Clausilia ids, Benson, A. M. N. H. ser. 2, x, 1852, p. 351 ; Godwin- 

 Austen, J. A. S. B. xlv, 1876, p. 318, pi. 8, fig. 13. 



Clausilia jo's, Pfeiffer, Mon. Helic. Viv. iii, 1853, p. 612. 



Clausilia ios, Hanley & Theobald, Conch. Ind. 1870, pi. 24, fig. 10. 



Clausilia (? Medora) ids, Blanford, J. A. S. B. xli, 1872. p. 200, 

 pi. 9, fig. 2. 



Clausilia jos, Sowerby, Conch. Icon, xx, 1875, Clausilia, pi. 8> 

 fig. 75 ; Nevill, Hand List, i, 1878, p. 184. 



Clausilia (Phaedusa (Euphaedusa}} joes, Boettger, Ber. Offenbacher 

 Ver. Naturw. 1878, Mitt. p. 53 ; Pfeiffer & Clessin, Nomencl. 

 Helic. Viv. 1881, p. 391. 



Original description: "Testa vix rimata, fusiformi, oblique 

 costulato-striata, pallide cornea, spira gradatim atteuuata, apice 

 obtusiusculo ; anfractibus 8-9, vix convexiusculis, ultimo ad basin 

 rotundato, antice fortius remotiusque costulato ; apertura pyri- 

 formi, larnellis subaBqualibus, inferiori furcata ; plicis palatalibus 

 duabus, l ma longissiina, a sutura remotiori, 2 nda obliqua, brevi, 

 a lunella satis distincta, interdum vix divisa, subcolumellari 

 immersa, peristomate continue, superne soluto, undique breviter 

 reflexo. 



" Long. 13, diarn. 3, apert. long. 3, lat. 2 mill." (Benson.) 



