408 LAND AND FKKSHWATER 



Alyceus davisi, n. sp. (Plate CXLVlll. figs. 9, 9 a.) 

 No. 1630 B.M. {Colonel W. T. Woodthorpe, R.E.). 



Shell depressedly globose, well iimbilicated ; sculpture fine 

 throughout, eveu next the sutural tube, first three or four lirae 

 strong and distant, epidermis covers the surface which peels off in 

 places ; colour dull umber ; spire low, apex flatly couvex ; suture 

 well impressed, sutural tube long ; whorls 4, the last very tumid, 

 close, and in front of the constriction there is a well-defined ridge 

 across the whorl, below it is close to tlie leflected peristome ; 

 aperture horizoutally oval, oblique, subanguhite above ; peristome 

 dou])le, crenulated, four distinct notches, the upper on the upper 

 margin, rounded on the columellar margin ; operculum pale in 

 colour, closely spiral with a small central depression. 



Size : maj. diam. b-6 ; alt. axis 2*1 mm. 



Four specimens represent the species, they were obtained by 

 Col. Woodthorpe on the expedition to define the Siam and Shan 

 Boundary in 1894/5. I name it after Captain, now Lt. -Colonel 

 H. B. Davis, commanding Oxfordshire and Buckinghamshire (^52nd 

 Lt. Infantry) Regiment, who was attached to the party. 



Altc^tts dohertti, G.-A. 



Moll. Ind. vol. ii. 1897, p. 3, pi. Ixiii. figs. 3, 3 a. 



Locality. Momeit. 



ALTCiEus HTTMiLis, W. Blanford. (69 rt Coll. Blf. & B.M.) 

 (Plate CLI. fig. 8.) 



W. T. Blanford, J. A. S. B. xxxi. pt. 2, 1862, p. 136. 



Original description : — " Testa aperte umbilicata, turbinato- 

 depres^sn, Ic^vis, rubello-succinea, ad apicem sanguinea. Sjnra 

 conoidea, apice obtusula, sutara jyrofimda. Anfr. 3|, rotundati, 

 idtimus ad latus mediocriter inflatus et confertim costidatus, turn 

 constrictus, ve7^sus aperturam brer' iter descendens. Striciura glabra, 

 longa, antice tumidior. Tiibtdum suturale breve \ peripherice sub- 

 ceqnans. Apertura obliqtia, circularis ; peristoma duplex; externo 

 retrorelicto, interna continuo, porrecto^ fere soluto. Operculum 

 corneum, midtispirum, externe concavum, 



" Diam. major 2^, minor 2 ; alt. 1| mm. 



" Hab. ad Akouktoung ad ripas fluminis Irrawaddi, in provincia 

 Burmana Pegu. 



" A solitary specimen of this species, slightly weathered and 

 showing more sculpture than usual, was found by me in April 

 1861, close to Myanoung on the banks of the Irrawaddy *. With 

 it I found a few other shells, amongst them a small variety 

 of Bulimus coenopictus, Hutt., and as this shell is not known to 



* [This with many other typical species is in the Blanford Coll., and I have 

 compared it with tlie Akouktouiig specimens. I consider it to be huinilis, 

 although it does show some C03tulati(jn posterior lo the point of the sulural 

 tube.] 



