140 Contributions to Indian Malacology. [No. 2, 



just referred to, although they have corresponding internal hollows, 

 are scarcely so prominent as those forming the sculpture of the upper 

 portion of the shell. They are nearer to the mouth than to the rise 

 of the sutural tube, and rest upon a tumidity which is scarcely suffi- 

 ciently pronounced to enable the species to be assigned to the section 

 Charax of Benson, although it exactly represents the well marked 

 ridge in the undermentioned species A. jjolygonoma. The sutural 

 tube is, in one specimen, somewhat short of the typical length. 



Of A. succineus, I only obtained 4 specimens. They occurred at 

 Moditoung together with A. graphicus, &c. All were dead, but in 

 fresh condition. 



6. Alyc^us poltgonoma, n. s. 

 Testa aperte et perspective umbilicata, turbinata," radiato-striata, 

 rubello-succinea. Spira conica, apice obtusula, sutura profunda. 

 Anfr. 4 rotundati, ultimus ad latus valde inflatus, ibidem confertis- 

 sime et acute costulatus ; spatium constrictum longitudinis medio- 

 cris, costulato-striatum, medio in costam prominentem, intus cavo-sul- 

 catam, 2 vel 3 costulis signatam, tumescens. Tubulum suturale 

 mediocre, \ peripheric subsequans. Apertura obliqua, pobygonali- 

 circularis, basi valde antice sinuata ; peristoma duplex ; interno vix 

 porrecto, margine dextro ter subangulato, basi subcanaliculato ; ex- 

 terno incrassato-expansulo, proeessu brevi, acuto, basali munito. 

 mm. inch 



Diam. maj. 5 or 0.2 



„ min. 4i 0.17 



Alt. 3| 0.14 



Ap. diam. If 0.07 



Hab. in montibus Arakanensibus. 



This species is allied to the last described but is distinguished by its 

 higher spire, less marked sculpture, by the strong ridge on the con- 

 striction, and by the more polygonal aperture. The incision of the 

 base, however, is slighter, and, in this species, accompanied by a slight 

 corresponding projection beneath, which represents, on a small scale, 

 the large ear-like basal process in A. prosectus Bens, from the Khasi 

 Hills. The inner peristome of that species also has a slight basal 

 indentation within the aperture. 



I am indebted for a few perfect specimens of this species to Captain 

 Ingram, who found them upon the Western side of the Arakan range. 



