lOS LAND AND FRESH WAIER 



typical locality, Teria Ghat ; (2) a small variety from the Khasi 

 plateau ; and (3) oue from the IVaga Hills, considered at first to be 

 ideutical, but distinguished as gijus, var. minor, which I afterwards 

 named A. butleri, G.-A. 



Su.bgenus Atjstenia. 

 (Continued from Yol. I. p. 238.) 



On Plate XC. will be found the anatomy of the Naga species, 

 A. butleri, G.-A, 



On Plate LXXXIX. that of the Khasi Hill A. gigas. 



The Naga Hill sjiecies must be placed in Austenia, not as I have 

 it on p. 22G (Vol. I.) in Girasia ; further correction is necessary on 

 p. 220, 12th line from the bottom, where Plate XXY. figs. 1-5 should 

 be omitted, and tlie addition made of Plate XXIV. fig. 9 (shell) 

 and Plate XXVI. figs. 5 & 8 (generative organs). 



Austenia guehavalensis, n. sp. (Plate XCI. figs. 1-1 A). 



Locality. Paurhi, Gurhwal {Lt. F. Howard, li.E.). 



Shell depressedly conoid, thin ; periphery ovate, very narrowly 

 umbiiicatcd, pellucid ; sculpture (fig. 1 h) strong transverse ridges of 

 growth, with fine regular chiselled longitudinal striae, 35=0"01 inch ; 

 colour olivaceous brown ; spire depressed ; apex rounded ; suture 

 shallow ; whorls 4, evenly increasing, rounded on the periphery ; 

 aperture oldique, ovately lunate ; peristome thin, rounded below, 

 from the columellar margin. 



Size : maj. diam. 21-75, niiu. 17'0 ; alt. axis 8"0 ; alt. body-whorl 

 9-25 mm. 



This species diflcrs much from all others hitherto obtained in the 

 X.W. Himalaya in its beautifully sculptured surface (fig. 1 h) ; in 

 form it may be distinguished from A. monticola by the larger apex, 

 less closely wound, and its more oval shape. 



Owing to the decayed state of the specimen, only a portion of 

 the anatomy could be noted. It possesses a thick amatorial organ 

 (fig. 1 h), pointed at the retractor muscle end and considerably 

 twisted *. The radula (figs. 1 d-1 g) is like that of gigas. Central 

 tooth with strong cusps on either side, the median with only one 

 on the outer side; up to the 22nd, 23rd, and the 24th are transitional 

 in form, and all the lateral are bicuspid, with one long point, the 

 second being some way below it on the outer side ; a few of 

 the outermost teeth (fig. 1 g) are minute and unicuspid. The 

 jaw (fig, 1 c) is strongly formed, concave, with a large central 

 projection. 



* I generally describe the form of all these internal organs as they appear 

 on tlissection. In trutli very little importance can be atiached to twisting, 

 or to the sharp bends many parts iissunie, owing to the natural sjjiral character 

 of the visceral mass. On piotrusion in life, all organs assume a vei'v diilerent 

 straighter appearance, which can be allowed for. 



