152 HELICID^I. 



traces of spiral sulci; aperture subrhomboid, peristome pinkish, 

 margins approaching, reflexed, upper and outer curved, basal 

 nearly straight, columellar thickened, strongly reflexed and 

 triangularly dilated over the umbilicus. 



The species was originally found at Tavoy, but a specimen is in 

 the British Museum collection, taken by Theobald at Tenasserira. 

 Although this shell is in a worn condition and appears to have 

 been varnished, it has enabled me to amplify Gould's original 

 meagre description. Opinions as to its systematic position have 

 been considerably at variance. Von Martens referred the species 

 to Phania \=Pyrochilus~], and Godwin-Austen to Eemiplecta, 

 whereas Pilsbry places it (correctly I think) in Camcena. Its 

 nearest ally appears to be Camcena vanbuensis, Smith. 

 J2*A second specimen in the British Museum, forming part of the 

 Cuming collection, is also dead and worn, but has been preserved 

 in its natural condition. The base is ornamented with spiral 

 sulci and the shell is considerably larger than the one in the 

 Theobald collection, measuring : Major diam. 53, minor 45, 

 alt. 32 mm. 



Genus OREOBBA, Pilsbry. 



Oreobba, Pilsbry, Man. Conch, ser. 2, ix, 1894, p. 109 (as submenus ? 



of \Obba). 

 Janira, Albers, Die Heliceen, 1850, p. 124; non Janira, Leach, 



1813 (Crustacea), Oken, 1815 (Acalepha), Schumacher, 1817 



(Mollusca). 



TYPE, Helix codonodes, Pfeiffer. 



Range. Nicobar Islands. 



"Shell globose-conoidal, bullet - shaped, composed of about 

 5 whorls which are car/mated in mature shells ; the embryonal 

 portion not differentiated ; last whorl deflexed in front. Surface 

 shining, microscopically spirally striated. Aperture truncate- 

 rounded ; entire lip well reflexed, at the columella expanded 

 partly over the narrow umbilicus, and armed with a callous tooth 

 on the inner edge." (Pilsbry.) 



Animal unknown. 



121. Oreobba codonodes, P/eiffer. 



Helix codonodes, Pfeiffer, P. Z. S. 1846, p. 112 ; Pteeve, Conch. 

 Icon, vii, 1851, pi. 22, fig. 91; Pfeiffer, Conch.-Cab., Helix, 

 ii, 1853, p. 232, pi. Ill, figs. 15, 16; iii, 1854, pi. 128, 

 figs. 3, 4; Kobelt, 111. Conchyl. Buch, ii, 1879, pi. 78, 

 figs. 19, 20. 



Helix (Janira} codonodes, Albers, Die Heliceen, 1850, p. 124; 

 Nevill, Hand List, i, 1878, p. 115. 



Stylodonta (Janira) codonodes, Chenu, Man. Conchyl. i, 1860, 

 p. 451, fig. 3363. 



