CLAUSILIA. 325 



in asaluensis, which latter also differs by a more slender shape 

 and smaller aperture." This form is referred to by Clessin as 

 var. solidior, Stoliczka (Nomencl. p. 391), although Stoliczka did 

 not so name it. 



Blanford states that the species varies considerably in form, 

 some specimens being much more fusiform than others. He 

 iigures three varieties, of which he considers the first as the 

 typical form. He further states that "the locality usually 

 assigned to this shell, Bengal, conveys a false impression, as 

 neither this nor any other Clausilia is found in the plains of 

 India. Teria Ghat, the locality mentioned in the ' Conchologia 

 Indica,' is at the southern base of the Khasi Hills, and the shell 

 is found at many places along the range, from the base up to 

 a height of, I believe, 4000 or 5000 feet. Major Godwin-Austen 

 sent me this species from Habiang on the Khasi plateau. I do not 

 know if C. loxostoma occurs also on the northern or Assam flank 

 of the range ; I have never seen specimens from any place in that 

 direction, and as the climate is much drier, many of the shells 

 common on the southern watershed are wanting to the north." 



When describing Cl. bengalensis in 1842, Pffeifer appears to 

 have been unaware of the fact that Benson's species, published in 

 1836, was identical. In 1848*, however, he recognized that the 

 two were inseparable, and be relegated bengalensis to the synonymy 

 of lozcostoma. 



The crenulations at the suture are rather distant in some 

 specimens and the shell varies, not only inform, as referred to by 

 Blanford, but also in size. A couple of shells from the Naga 

 Hills, having nine whorls, measure 23 x 5 mm. and 25*5 x 5'5 mm. 

 The palatal folds not mentioned by Benson are five or six in 

 number, and are distinctly visible from the aperture. Again, 

 three shells from Teria Ghat, in the Theobald collection, com- 

 posed of 9J whorls, measure 24-5 x 5-25 mm. On the other hand, 

 some shells from Cherra-poonjee collected by Cantor, and now in 

 the British Museum, only reach a length of 20*5 mm. 



287. Clausilia nevilliana, Mollendorff. 



Clausilia nevilliana^ Mollendorff, J. A. S. B. li, part 2, 1882, p. 11, 

 pi. 1, tig. 11 ; Godwin-Austen, P. Z. S. 1895, p. 443. 



Original description : " Testa elongate fusiformis, subtiliter 

 oblique striatula, f usca, nitidula ; anfr. 10 convexiusculi, apertura 

 mediocris, fere verticalis, elongato-piriformis, sinulo recto per- 

 longo, peristoma continuum, solutum, tenue, brevissimeexpansum, 

 superne profunde smuaturn fere angulatum. Lamella supera 

 obliqua, marginalis, valida cum lamella spirali continua, infera a 

 supera valde remota, spiraliter recedens, brevissime conspicua. 



* Mon. Helic. Viv. ii, p. 405. 



