76 



ZONITIDA\ 



114. Ratnadvipia irradians, Pfr. (Vitrina) P. Z. S. 1852, p. 156 ; 

 ill (Vitrina) Man. Hd. iii," 1853, p. 3; id. t. c. vii, 1876, p. 14; 

 H. 4- T. (Vitrina) C. /. 1876, p. 29, pi. 66, figs. 8, 9 ; Godivin- 

 Austen, Mol. Ind. ii, 1898, p. 93, pi. 85, figs. 1-8 (animal & 

 anatomy); Collimje, Jour. M<il. viii, 1901, p. 65, pis. 5, 6 (anatomy). 



Shell imperforate or subperforate, depressed, thin, diaphanous, 

 dull browuish horny above, striated and decussated with rather 

 uneven impressed lines, rather paler, smooth, and polished beneath; 

 spire scarcely raised, suture impressed ; whorls 4, flattened above, 



Fig. o9. — Ba(ju(chipia irradknis. 



rapidly increasing, the last uuich broader than the others, rounded 

 at the periphery, convex beneath ; aperture large, very oblique, 

 lunately oval; peristome simple, thin, the upper margin arcuate, 

 columellar margin regularly curved, briefly reflected close to the 

 junction with the body-^^ horl. 



Major diam. 24, min. 19, axis 11 mm. 



Hah. South-western Ceylon, Kandy ( CoUett) ; Peradeniya {Free- 

 man). There are specimens in the British Museum said to be 

 from Southern India, but the locality is regarded as very doubtful. 



115. Ratnadvipia ? edgariana, Bs. (Vitrina) A. M. N. H. (2) xii, 

 1853, p. 93 ; Ffr. (Vitrina) Mo7i. Hel. iv, 1859, p. 792 ; Nev. (Heli- 

 cariouj Hand-l. i, 1878, p. 15. 



" Shell much depressed, \ery thin, membranaceous beneath, 

 highly polished, pellucid, striated obsoletely and obliquely above, 

 ornamented by a few impressed spix'al lines, yellowisli horny ; 

 spire rather flat, apex prominent, suture impressed ; ^^"horls JJ, 

 rapidly increasing, somewljat flat, the last very convex at the 

 periphery ; aperture oblique, ovately lunate. 



" Major diam. 10, minor 8, height 4 mm." {Benson, in Latin,) 



Hah. At Colombo, Hangwelle, and Ratnapura in the island of 

 Ceylon. 



It is very difficult to form any idea of the affinities of the 

 present species. The presence of spiral impressed lines may 

 indicate a relationship with It. irradians. tTnfortunately no 

 specimens are available for examination. 



