426 LAND AND FRESHWATER 



next suture, adjacent to the long and fully-developed sutural tube 

 the costulation is fine and very close together; colour pale ochra- 

 ceous ; spire moderately high, apex rather blunt ; suture impressed ; 

 whorls 4^, very rounded, the constriction moderate, the distance 

 from tube to the aperture short and smooth ; aperture circular, 

 subangulate above, subvertical ; peristome double, continuous, 

 curved on the inner margin, the outer slightly reflected. 



Size : maj. diam. 4'25 ; alt. axis 2*4 mm. 



A much more globose shell than true vestitus. Side of spire 

 sliijhtly concave. I received a single specimen of this shell many 

 years ago from \\\ Blanford (No. 209(5 B.M.). 



9. Tenasserim. 



{Bioryx) amphora, Bs. PI. CLTII. figs. 11, 11 a, 11 6. 



ataranmsis, ii. sp. PI. CXLVIII. figs. 4, 4 a, 4 b. 



{Dioryx) labriruhidum, n. sp. PI. CLV. figs. 1,1a. 



pi/rumidalis, Bs. PI. CLVI. figs. G, 6 a. 



richthofeni, W. Blf. PI. CLI. fig. !>. 



Altc^us atakanensis, n. sp. (Plate CXLVIII. figs. 4, 4rt, Ah.) 



Nevill's Hand-list, i. 1878, p. 293. 

 " 36. Alycceus, n. sp. (prox. crispatus)." 



Theobald & Stol. J. A. S. B. 1872, p. 330. A. crisjxitus as 

 occurring at Maianoung and near Moulmein. 



Locality/. 1 Ataran (ex coll. Dr. F. StoliczJca). 



Shell globosely conoid, rather openly nmbilicated ; sculpture : 

 rather distant costulation on the upper whorls (specimen being old 

 they do not show well); colour bleached; spire moderately high, 

 apex blunt; siiture impressed; whorls 4, the last slightly swollen 

 near sut ural tube ; constriction very short, a well-marked ridge 

 rising between it and the aperture ; aperture irregularly oval, 

 oblique ; peristome double, inner lip with four deep notches, with 

 intermediate sharp notches, outer undulated, both much expanded 

 and protruding forwards, detached from the last whorl, forming 

 a deep notch on the inner upper margin ; columellar margin 

 rounded. 



Size: maj. diam. 2-30; alt. 1-90 mm. 



It is easily mistaken for A. crispatus, of the jS^aga Hills, but 

 differs materially in the part between the suture and aperture. 

 It is the A. crispatus mentioned by Theobald and Stoliczka in 

 J. A. S. B. 1872, p. 330. 



The type shell has gone back to the Indian Museum, Calcutta. 



