Mr. W. II. Benson on new species of Burmese Helices. 251 



5. Helix Hariula, n. s., nobis. 



Testa perforata, subturbinata, tenui, oblifjue striatula, striis iiiiuu- 

 tissiiiiis confertissimis spiralibus sub lente ornata, nou nitente, 

 (Hapbana, pur])ureo-cornea, strigis opacis, albis, laciuiatis, fascias 

 duas latas efformantibus, picta ; spira conoidea, a])ice obtuso, 

 sutura impressa ; anfractibus A\ eonvexiusculis, ultimo ad peri- 

 pba:riam obtuse augulato ; apcrtura obliqua, late lunata ; peri- 

 stomate teuui, albido, margiue dextro, basalique expauso, colu- 

 mellari laniiuaui triangularem dilatatam, umbilieum subtegcntcm 

 efformante. 



Diam. major 1.5, miuor 13, axis 10^ mill. Apert. (j\ mill, longa, 

 S lata. 



Hub. ad Tbyet Myo, prope ripas Irawadi fluvii. Detexit W. Theobald. 



The interspace between the opakc bands forms a dark girdle 

 below the angle, and the pcriomphalus is similarly coloured. 

 The shell is more depressed in form and destitute of a keel, but 

 singularly like the rare H. Capitium, Bens., in colouring. Since 

 the discovery of the latter species by Capt. Boys, at the foot of 

 the Kajmahal Range near Sikrigali, it has not been met with by 

 any naturalist in that quarter ; but an imperfect specimen of a 

 very rare Helix met with by Mr. Theobald in the hills above 

 Cuttack, 400 miles to the southward of its original habitat, 

 proves to be a young H. Capitium. 



6. Helix bifoveata, n. s,, nobis. 



Testa umbilicata, oblato-globosa, utrinque concava, oblique striata, 

 minutissime granulata, luteo-fusca, translucente ; spira profunde 

 excavata, perspective umbiliciformi ; anfractibus -4^ angustis, con- 

 vexis, recedentibus, ultimo prominente, superne compresso, glo- 

 bose, caeteros occultante, subtus circa umbilieum mediocrem per- 

 spectivum compresse angulato ; apcrtura verticali longissima utriu- 

 que tcstam superaute, angustissime lunata, superne et iufra suban- 

 gulata ; j)cristomate simpliei, acuto, expansiusculo, margiuibus 

 remotis convcrgentibus, columellari brevi subverticali, Icviter 

 exj)anso. 



Diani. major 10, minor 9, axis 6 mill. Long, apert. 7, lat. vix 2 mill. 



Hub. ad collem Therabuin vailis Tenasserim raro. Detexit W. Tbeo- 

 bald. 



Tbis is the most singular among the planorbular Helices 

 which exhibit a concavity, and, as it were, an umbilicus on the 

 spiral, as well as the basal face of the shell. The parietes of the 

 true or basal umbilicus are more vertical than those of tbc 

 spiral depression, and the excavation is deeper. The sculpture 

 is ])eculiar, consisting of lines of granules crossing each other 

 obbquely. 



Tbe published species most nearly related to H. hifoveatd arc 

 //. Umicron, I'fr., //. Shutlleworthi, and H. Calculus. 



