186 Mr. W. H. Benson on new species of Helix. 



Survey, during his visit to the capital of Ava. The specimens 

 examined are in a weathered and bleached condition. Its nearest 

 ally is the Chinese H. Oculus, Pfr. ; but, independently of the 

 smaller size of H. Oldhami, it may be at once distinguished by 

 its more depressed form, carinated periphery, fewer whorls, peri- 

 stome, &c. In a fresh state it is probably clothed with a con- 

 spicuous epidermis. The form is interesting from its geogra- 

 phical position, indicating an approach to the Chinese and 

 Loo-Choo fauna. 



6. Helix Cassidula, n. s. 



Testa ])erforata, semigloboso-turbinata, striatula, striis minutissimis, 

 confertissimis, spiralibus, sub lente apparentibus, decussata, niti- 

 dula, albido-lutescente, fascia 1 lata, rufo-fusca, supra peripberiam 

 cincta ; spira conoidea, sutura impressa, leviter inarginata, apice 

 obtusiusculo ; anfractibus 5 convexis, lente accrescentibus, ultimo 

 ad peripberiam rotundato, subtus convexiuseulo ; apertura parum 

 obliqua, subquadrato-lunata, peristomate tenui, acute, margine 

 columellari brevi, verticali, expansiusculo, cum basali angulum 

 rectum efformante. 



Diam. major 6, minor 5^, axis 4 mill. 



Habitat ad Moulmein, nee raro. 



7. Helix Bombax, u. s. 



Testa subaperte et profundissime umbiUcata, subdepressa, superne 

 oblique flexuose costulato-striata, subtus Isevigata, albida ; spira 

 convexiuscula, apice vix elevate, planulate, leevigate, sutura im- 

 pressiuscula ; anfractibus b\ cenvexiusculis, ultimo ad peripberiam 

 rotundato, subtus convexo, circa umbilicum perspectivum vix sub- 

 angulato ; apertura parum obliqua, quadrato-lunata, peristomate 

 tenui, recto, superne antrorsum arcuato, margine columellari vix 

 oblique descendente, breviter expansiusculo, cum basali angulum 

 obtusum efformante. 



Diam. major 8, minor 6, axis 4 mill. 



Habitat ad Moulmein, necnon ad Pbie Than in provincia Tenasserim, 

 satis frequens. 



The single specimen sent is bleached, and without epidermis. 

 The strong flexuously -ribbed striation on the upper side of the 

 shell, and the prominent arcuation of the right lip above, are 

 notable features, and will secure recognition even if the shell 

 should pi'ove to be translucent and horn-coloured when perfect. 



8. Helix Bascauda, n. s. 



Testa anguste et profunde umbilicata, conica, trocbiformis, costis 

 elevatis remotiusculis obliquis, subtus flexuosis, regularibus ornata, 

 rufo-cornea ; spira conica, apice obtusiusculo, sutura impressa ; 

 anfractibus 6 convexiusculis, ultimo non descendente, ad peri- 

 pberiam filoso-carinato, subtus convexo, circa umbilicum sub- 



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