424 LAND AKV FRESHWATER 



in the Natural History Museum from Theobald, also from Mai-i. 

 One measures 9"2o mm. in major diameter. 



Altc^tts succineus, W. Blanford. (Plate CLI. fig. 2.) 



Type Blf. Coll. No. 52.06.4.4 B.M. 



Blanford, J. A. S. B. xxxi. 1862, p. 139 ; Hanley & Theohald, 

 Conch. Ind. 1870, p. 39, pi. xcvi. figs. 7, 10 ; Theobald, Cat. tSuppl. 

 1876, p. 40; Pfr. Mon. Pneum. iii. p. 50. 



Original description : — " Testa aperte timhilicata, depresso-turhi- 

 nata, acute sinuato-costulata, succinea, translucens. Sptra conoidea, 

 apice obtusida, sutitra impressa. Anfr. 4, idtimus ad lutus injlatus, 

 ibidem confer tissime costidatits. Siricfitra longa, medio tumida, et 

 duobus vel tribus costulis obliquis, Sidculis inteniis, correspondentibus, 

 signata. Tidndum suiurale mediocre, \ peripherics suba'quans. 

 Apertura obliqua, irregidariter circidaris, superne subangidata ; 

 peristoma dtiple^v; interno continuo, incrassato, expansulo, margine 

 de.vtro bis obtuse anyulato, ad basin canaUcido liaud hitracte 

 perforata ; externo breviter expanso, retrorelicto, 



" Diam. major 5, miu. 4, alt. 3|, apert. diam. 1| mm. 



„ 0-2, „ 0-16, „ (|-13, „ „ 0-10 inch. 



" Habitat in montibus Arakanensibus. 



"Some of the peculiarities of this species, such as the canaliculate 

 base of the peristome and the two or three small j^laits on the con- 

 striction, are repeated in that next described {A. poh/gonoma). The 

 plaits or ridges 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 thesiitural tube, and rest upon a tumidity 

 •which is scarcely sufiiciently pronounced to ena})le the species to 

 be assigned to the section Charax of Benson, although it exactly 

 represents the well-marked ridge in the undermentioned species 

 A. p>oliigonoma. The sutural tube is, in one specimen, somewhat 

 short of the typical length." 



" Of A. succineus I onlj' obtained four specimens. They occurred 

 at Moditaung together with A. graphicus, &c. All were dead but 

 in fresh condition." 



Two of these I found among Blauford's shells. 



Alyc-eus umbonalis, Bs. 



Godwin-Austen, Moll. Ind. vol. i. 1886, p. 194, pi. xliv. figs. 2, 

 2 a, 2 b. 



Blf. Coll. No. 2.06.5.5 B.M. These are the specimens from the 

 Arakan Hills, east side on the Tongoop Road, referred to. One, 

 varying somewhat, came from Mai-i, Arakan (ex coll. tStoliczl-a). 



Alyc^tts vestitus, W. Blanford. (Plate CXXXIX. figs. 2, 2 a.) 



Type Blf. Coll. No. 53^06.4.4 B.M. 



W. Blanford, J. A. S. B. xxxi. 1862, p. 138 ; Hanley & Theobald, 



