190 



when extended. Left dorsal lobe bifid, the posterior portion 

 narrow. Mucous gland with a small rounded overhanging lobe 

 above. Foot long and narrow, the sole divided into median and 

 marginal areas. In the genitalia the male organ is a simple, short, 

 bulbous sheath, the retractor muscle is attached to the side, with- 

 out any caecum, and the vas defer ens enters at a short distance 

 from the retractor without distinct kale-sac. Spermatheca of 

 moderate length, subcylindrical ; amatorial organ (dart-sac) 

 wanting. 



In the radula the median tooth has a strong cusp on each side 

 about halfway down ; the inner laterals have an upper inner lateral 

 cusp and an outer lower one ; outer laterals bicuspid, the outer 

 cusp below the inner. Teeth in a row : 45 . 2 . 12 . 1. 12 . 2 . 45 

 (59 . 1 . 59). Jaw with a projection in the middle inside. 



On account of the remarkable mantle-lobes and genitalia, 

 Col. Godwin- Austen made this species the type of a subgenus 

 Eurychlamys, to which probably several South Indian and Ceylonese 

 forms should be referred. The division is fully justified. [At 

 present only this and the next species are known to belong to it. 

 The animals of so many species from S. India remain to be 

 examined.] 



288. Eurychlamys regulata, Bs. (Helix) A. M. N. H. (3) v, 1860, 

 p. 383 ; Pfr. (Helix) Mon. HeL iv. p. 125 ;H.$T. (Helix) C. I. 

 1876, pi. 81, figs. 5, 6 ; Godwin-Austen (Eurychlamys), Mol. Ind. 

 ii, 1899, p. 92, pi. 84, figs. 2 a-g ; Kobelt, in Mart, $ Chemn. Syst, 

 Conch.-Cab. ed. 2, Naninidro, 1901, p. 1028, figs. 26, 27. 



Shell scarcely perforate, shbglobosely depressed, thin, obliquely 

 obsoletely striated, very neatly ornamented throughout with fine 

 parallel spiral impressed lines, rather further apart above than 

 below, brownish horny, translucent, highly polished ; spire 

 depressedly conoidal, apex rather obtuse, suture impressed, but 

 shallow ; whorls 3^-, slightly convex, rapidly increasing, the last 

 broader, slightly compressed at the periphery, more convex 

 beneath ; aperture large, oblique, roundly lunate ; peristome 

 straight, acute, columellar margin curved, vertical above and 

 rather broadly subtriangularly reflected over the perforation, 

 margins remote. 



Major diam. 10, min. 81, axis 5J mm. 



Hob. Ceylon, Kaluganga in East Matelle, Katukellekande 

 (Layard), and Badulla (Collett). 



Animal very similar to that of E. platychlamys : foot long behind 

 the shell, lobe over the mucous gland elongate ; shell-lobes broad, 

 almost or completely covering the shell when extended. Penis a 

 simple long sheath without caecum or other appendage, the vas 

 deferens joining it very near the retractor muscle. No dart-sac. 

 Teeth on radula thus arranged : 55 . 2 . 12 . 1 . 12 . 2 . 55 (69 . 1 . 69). 

 Median tooth tricuspid ; lateral cusps basal, inner laterals bicuspid 



