176 HELICARTON. 



H. MONTICOLA, Benson. PL 40, figs. 21-23. 



Depressed, thin, stimulate, shining, pellucid, yellowish, cor- 

 neous; spire plane, suture lightly impressed ; whorls 4, rapidly 

 increasing, flattened, the last not descending. 



Diam. 18, alt. 7'5 mill. 



Western Himalayas. 

 H. SCUTELLA, Benson. PL 40, figs. 24, 25. 



Depressed, oblong-ovate, arcuately striulate, shining, translu- 

 cent, light greenish yellow, spire nearly planate, suture margi- 

 nate ; whorls 3^, rapidly enlarging. Diam. 16-18, alt. 5-6 mill. 



Khasi Mts.; Kashmir. 



A little more depressed, more oblong, with fewer whorls than 

 H. monticola. 



H. HETEROCONCHA, Blanford. PL 40, figs. 26-28. 



Depressed, thin, diaphanous, polished, obsoletely arcuately 

 striate, irregularly subcostulate towards the aperture, yellowish 

 corneous, more greenish near the aperture, spire planate, suture 

 white-margined ; whorls three, rapidly increasing ; basal margin 

 of aperture flattened, rather widely membraneous. 



Diam. 17, alt. 5 mill. Darjiling, India. 



H. OVATUS, Blanford. PI. 40, figs. 29, 30. 



Depressed, rather thin, diaphanous, polished, obsoletely arcu- 

 ately striate, yellowish brown ; whorls 3^, the last descending 

 near the aperture, suture margined. Diam. 11'5, alt. 5 mill. 



Darjiling, India. 

 H. CHRISTIANA, Theobald. PL 40, figs. 31, 32. 



Subgiobose, thin, polished, diaphanous, shining, costulately 

 striate above, amber-brown, the apex lighter; whorls 3J, slowly 



increasing. Diam. 13, alt. 8 mill. 



Andaman Isles. 

 H. IRRADIANS, Pfr. PL 40, fig. 33. 



Depressed above, more convex below, thin, impressly arcuately 

 striate and obsoletely spirally lineate, diaphanous, scarcely 

 shining, cinnamon-corneous above, smoother, more shining and 

 lighter colored, yellowish green, below, suture margined ; whorls 

 scarcely 4, rapidly enlarging, the last flattened above. 



Diam. 18-5, alt. 8'5 mill. Ceylon. 



Yar. /9. Larger. Diam. 25, alt. 11 mill. 



