MOLLUSCA OF INDIA. 1G3 



The sculpture shows longitudinal regular distant rather wavy 

 striae, coarser near the suture and very distinct on the basal side. 

 Maj. diam. 7'5, min. G-7 ; alt, axis 3-0 mm. 



Macrochlamys salwinensis, n. sp. (Plate CIX. fig. 9.) 



Locality. Salwin Valley. 



Shell globosely conoid, scarcely perforate, quite smooth ; colour 

 ochraceous ; spire moderately high, apex rounded : whorls 5, 

 regularly increasing, somewhat convex ; aperture oblique, semi- 

 ovate ; columellar margin vertical ; peristome slightly reflected. 



Size: maj. diam, 6-7, min. 5-8; alt. axis 3-5, body-whorl 

 2-8 mm. 



This shell was sent me by Mr. Nevill as No. 142, p. 3G, of his 

 ' Hand-list,' Nanina (Microcystis) causia, Bs., from the Salwin. 

 It agrees very well with the figure in the Conch. Indica (pi. xc. 

 figs. 2, 3), which was possibly a typical specimen, as it is recorded 

 on p. 37 as from Phiethan, Tenasserim, and should now be found 

 in the McAndrew Collection at Cambridge, among Benson's 

 shells. 



The shell (fig. 9) from the Calcutta Museum does not altogether 

 agree with Benson's description of H. causia, which I give below 

 for comparison, particularly in the sculpture. 



Macrochlamys causia, Benson. 



Helix causia, Bs. A. M. N. H. 1859, vol. iii. p. 388 ; Pfr. Moii. 

 Hel. vol. V. p. 118 ; Hanley, Conch. Ind. pi. xc. figs. 2, 3. 



Macrochlamys (sec. D) causia, Theob. Suppl. Cat. p. 19. 



Nanina (Microcystis) causia, Nevill, Hand-list, p. 30. no. 142. 



Trochomorpha (sec. i. Nigritella) sp., Pfr. ed. Clessin, Nomencl. 

 Helic. p. 81 (1881). 



Original description : — " Testa perforata, conoideo - clepressa, 

 solidula, oblique striatula, striis minutisshnis confertissimis spiralihus 

 sub lente signata, nitidula, fulvescenti-cornea, s\d)tus j^allidori ; spira 

 conoidea, sutura impressa, submarginata , apice obtuso, hyalino ; 

 anfractibus 5, convexiusculis, idtimo ad peripheriam valde rotundato ; 

 apertura obliqua, subrotundato-lunari, peristomate acuta, recto, 

 margine columellari breviter exjianso-reflexo. 



" Diam. major 7, minor 6, axis 4 mill. 



" Habitat ad Phie Than, vallis Tenasserim. 



"A small iVrtnina-like species, with no very prominent character 

 besides the minute spiral sculpture." 



Macrochlamys hookeri, n. sp. (Plate CIX. figs. 10, 10 a.) 



Locality. Cherra Poonjee and in the valley to the eastward. 



Shell scarcely perforate, tumidly globose, thin, diaphanous, smooth, 

 strong epidermis ; colour dull ochraceous ; spire depressedly conoid; 

 whorls 4, slightly convex above, rather rapidly increasing ; aperture 



part X. *>i 



