MACliOCHLAMYS. 123 



Left mantle-lobe (shell-lobe) reflected over the outer lip, but not 

 much produced ; right mantle-lobe above shortly linguate. Tail- 

 gland distinct, with a hook-like appendage above. Genitalia 

 simple ; no spermatheca nor dart-sac was seen ; penis very simple, 

 with a small kale-sac at the point where the vas deferens joins. 

 Jaw broad, smooth, with a projection in the middle inside. Teeth 

 of radula in straight transverse rows of about 120 each ; middle 

 tooth of each row represented as quinquecuspid *, having two 

 lateral cusps on each side, the terminal cusp long, pointed, and 

 curved ; inner laterals with two outer lateral cusps and one inner 

 one ; outer laterals bicuspid, with an outer basal lateral projection. 

 (From Stoliczka's notes.) 



196. Macrochlamys ? curvilabris, lf. P. Z. S. 1904, ii, p. 445, pi. 25, 



fig. 13. 



Shell perforate, depressed, brownish, smooth, polished, scarcely 

 striated ; spire very long, suture well impressed ; whorls 5|, 

 regularly increasing, convex above, the last descending somewhat 

 towards the aperture, rounded at the periphery, flatly convex 

 beneath ; aperture oblique, broadly lunate ; peristome obtuse, 

 white and thickened inside, and much curved, upper margin 

 slightly arcuate, basal prominently curved forward in the middle, 

 columellar oblique, slightly reflected. 



Major diam. 5|, min. 5, height 2 nim. 



Hob. Arakan Hills west of Prome. 



This is the small form, " with the curvature and thickening of 

 the peristome exaggerated," mentioned amongst the Burmese 

 shells collected by me in 1860-62 (J. A. S. B. 1865, 2, bottom of 

 p. 86). It is almost a miniature of M. aspides. 



b". Longitudinally striated. 



197. Macrochlamys ? perpaula, Bs. (Helix) A. M. N. H. (3) iii, 1859, 



p. 390 ; Pfr. (Helix) Mon. Hel. v, 1886, p. 69 ; Neoill, Nanina 

 (Microcystis), Hand-L i, 1878, p. 37; Godwin- Austen, Mol IncL 

 i, 1882, p. 89, pi. 14, fig. 5. 



Shell minutely perforate, depressedly globose, smooth, not 

 polished, obliquely striated, and very minutely spirally (longi- 

 tudinally) ribbed throughout, urnber-bro\vn ; spire conoidly convex, 

 apex blunt, suture impressed ; whorls 4, gradually increasing, 

 convex, the last rounded at periphery and below ; aperture 

 oblique, lunate ; peristome straight, acute, columellar margin 

 oblique, slightly reflected above. 



Major diam. 2, min. 1|, height 1^ mm. 



Hao. Phiethan, Tenasserim (TJieobald), Moulmein (Stoliczka). 

 ]N"evill refers to this species shells from Thayetrnyo, Arakau, 

 Darjiliug, and Pareshnath [the last two are very unlikely]. 



Allied to M. molecula, but, besides its much smaller size, it is 

 more globose (Benson). 



* This may be due to an error of obseryalion, as in the case of Sitala 

 infula. 



