308 CLAUSILIID7E. 



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

 subcolumellar fold forms a groove — somewhat ^ider towards the 

 base — into Avhich the clausiliuni 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 plicsB 1 find are not quite as described by Stoliczka, there 



r 



/ 



Fig. 105. — Clausilia waageni. 

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



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. Pig. 105 shows the inner side of the last whorl 

 A\ ith the palatal pliciB in situ. 



272. Clausilia ios, Benson. 



Clausilia iijs, Beuson, A. M. N. H. ser. 1', x, 1852, p. 351 ; Godwiu- 



Austen, J. A. S. B. xlv, 1876, p. :!18, pi. 8, fig. 13. 

 Clausilia jiis, Pfeift'er, Mon. Hehc. Viv. iii, 1853, p. 612. 

 Clausilia ios, TIaiilev & Theobald, Couch. Ind. 1870, pi. 24, fig. 10. 

 Clausilia (? Medor'a) ios, Blanford, J. A. S. B. xli, 1872, p. 200, 



pi. 9, fig. 2. 

 Clausilia Jos, Sowerby, Conch. Icon. xx. 1875, Clausilia, pi, S, 



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

 Clausilia {Fhacdusa {Euphaedusa)) joes, Boettger, Ber. Ofleubacliev 



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



Hehc. Viv. 1881, p. 391. 



Orhjinal description: — "Testa vix rimatn, fusiformi, oblique 

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

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

 rotundato, antice fortius remotiusque costulato ; apertura pyri- 

 formi, lamellis subtequalibus, inferiori furcata ; plicis palatalibus 

 duabus, 1™''^ longissima, a sutura remotiori, 2"'^^ obliqua, brevi, 

 a lunella satis distincta, interdum vix divisa, subcolumellari 

 immersa, peristomate continue, superne solute, uudiqiie breviter 

 retiexo. 



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



