HAVANA. EUPLECTA. 51 



Animal (of M. politissima) without shell-lobes; right dorsal 

 lobe moderate, the left divided into a large anterior and a small 

 posterior lobe with a wide interval between them. Sole narrow, 

 undivided, truncated behind ; mucous pore large, overhung by a 

 large lobe. Kale-sac short, curved, rather pointed at the free end, 

 receiving the vas deferens at about one-third its length from the 

 junction with the diverticulum leading to the retractor muscle ; 

 [retractor muscle attached to a caecum ;] penis-sheath short, distally 

 to the junction sharply bent, the two segments of the bend held 

 together by a muscular band ; diverticulum stout, simple. Sper- 

 matheca very short. Amatorial organ (dart-sac) very large, 

 much larger than penis. Jaw arched, with a median projection. 

 Eadula broad, with a broad median tract, the teeth-formula being 

 56 . 2 . 18 . 1 . 18 . 2 . 56 (76 . 1 . 76) ; rhachidian tooth broad, with 

 a large cusp on each side, the 18 inner laterals or admedians each 

 with a single well-marked cusp on the outer side ; outer laterals 

 narrow, long, aculeate, the outermost marginals very short. 



The only species known was regarded as a Macrochlamys until 

 the anatomy was examined. Possibly some other thin, horny, 

 depressed shells from S. India or Ceylon belong to the present 

 genus. 



78. Ravana politissima, Pfr. (Helix) P. Z. S. 1853, p. 125; id. 

 (Helix) Mon. Hel. iv, 1859, p. 45 ; H. $ T. (Helix) C. 2. 1876, 

 pi. 81, figs. 8, 9 ; Godwin- Austen, Proc. Mai Soc. iv, 1901, p. 261, 

 pi. 36. 



Shell openly perforate, depressed, thin, polished, greenish or 

 castaneous horny, striated beneath the epidermis, and marked 

 with faint impressed spiral lines, not perceptible in fresh shells ; 

 spire low, obtuse, suture deeply impressed. Whorls 4^-5, convex, 

 regularly increasing, the last rounded, not descending ; aperture 

 slightly oblique, roundly lunate ; peristome simple, nearly in one 

 plane, thin, the margins converging, columellar reflected above. 



Major diam. 24, min. 20, axis 11 mm. 



Hob. The hills of South-western Ceylon, at an elevation of 

 about 3000 feet; Pusilawe (Layard) ; Watawale (Cottett). 



Genus EUPLECTA. 



Euplecta, Semper, Reise Phil, Wiss. Res. iii, p. 14 (1870) ; Godwin- 

 Austen, Proc. Mai Soc. ii, 1899, p. 173 ; id. Mol 2nd. ii, 1898, 

 p. 96, pis. 87, 97 ; Blf. Proc. Mai Soc. iv, 1901, p. 246. 



Type, E. subopaca, Pfr. 



Range. The Indian Peninsula and Ceylon. Nearly all the 

 species are confined to the neighbourhood of the western coast 

 of India and the mountains of S.W. Ceylon. 



Shell perforate (rarely imperforate), of moderate size, depressed 

 turbinate, turbinate or trochiform, rather closely wound, generally 



