MOLLUSCA OF INDIA. 425 



Conoh. Ind. 1870, p. 42, pi. ciii. fi^. 4 (a very bad figure); 

 Theobald, Cat. Siipp. 1876, p. 40 : Von Mollendorff, in Section 

 OrtJiahjcceus, Nachrbl. Deutsch. Malak. 1897, p. 148. 



Origiual description :—" I^a-to sabanguste umbilicata, turbinata, 

 solida, epklennlde decidaa, crassa, subtestacea, sordide albida, con- 

 ferte, ad spntinm injiatam confertissime costidata, induta, sub- 

 epidermide rubella, heuts, spatio iiijlato costidato-striato. Sjjira 

 conoidea, apice obfusa, suiara impressa. Aafr. 4|, rotundati, 

 ultlmus teres, ad latus parum inflatus. Strictura brevis, versus 

 aperturam viv tumidior. Tahulum suturale mediocre. AperUira 

 fere verticalis, circidaris, majuscnla ; peristoma duplex, interna 

 continuo, externo expansulo, ah interna sulco separata, ad anfr. 

 penultimum breviter interrupto. 



" Diara. major 5, min. 3|, alt. vix 3 mm. 



" Habitat in montibus Ai'akaneiisibus. 



" Var. minor. Diara. maj. 4, min. 3, alt. 2^ mm. 



" Habitat cum A. graphicus ad Moditaung. 



" But a single specimen of each variety was found. The first 

 was obtained on the banks of the Pado Khyoung, a stream running 

 ffom the Arakan range on the Pegu side in the district of Henza- 

 dat. A single specimen either of another variety or of a distinct 

 but closelj'-allied species occurred to me on the banks of another 

 stream, the Alou Khyoung, lying between the two previously men- 

 tioned localities. This form differs in having a simple lip and 

 apparently a longer sutural tube. None of the specimens are quite 

 fresh, although all are in fair condition and unbleached. Of the 

 epidermis only traces remain on both shells. 



" This species is not affined to any known form. It is perhaps 

 nearer to the little group to which A. riraphicus belongs than to 

 any other, but it has not the short sutural tube nor the ovately 

 conoid form which characterizes that section of the genus. The 

 shortness of the constriction and the very slight degree in which 

 it expands towards the aperture, connect this form somewhat with 

 the Section Dioryx of Mr. Benson." 



The type from Moditaung is in the Blanford Collection (No. 53 ^). 

 This I have figured. With it, gummed on the same glass slip, was 

 the shell mentioned above from the Alou Khyoung Stream (No. 53^). 

 They are exactly the same, only in this specimen the peristome is 

 not so fully grown. With these two there was another specimen 

 marked " Mamya Khyoung" (No. 53 '), which, although very much 

 larger, presented no other difference whatever. 



Size of type : maj. diam. 3-75 ; alt. axis 2*25 mm. 



„ the large var. : „ 5-U ; „ 3-0 „ 



Altc^us vestitus, W. Blf.. var. akyabensis. 251-2 B.M. Coll. 

 (Plate CLV. fig. 7.) 



Locality. Baumi, Akyab. In B.M. Coll. from Theobald. 

 Shell moderately umbilicated, globosely conical, solid ; sculpture : 

 apical whorls smooth, then succeeds fine close costulation, stronger 



2h2 



