Mr. \V. H. Benson on new Land-Shells. 87 



XII. — Characters of new Land-Shells of the Genera Helix, Clau- 

 silia, and Spiraxis, from the Andamans, Moulmein, Northern 

 India, and Ceylon. By W. H. Benson, Esq. 



1. Helix Haughtoni, B., n. sp. 



H. testa perforata, subumbilicata, solidula, subtrochiformi, irregu- 

 lariter oblique obsolete plicatula, confertissime et minutissime 

 spiraliter striata, epidermide rubenti-olivacea ; spira depresse 

 conoidea, apice valde obtuso, sutura impressa ; anfractibus 4^-5, 

 convexis, ultimo antice breviter vix descendente, ad peripheriam 

 angulato, subtus convexo, circa umbilicum intus callo arctatum 

 compressiusculo ; apertura obliqua, subrotundato-lunata, sub- 

 quadrangulari, intus albida, peristomate recto, marginibus callo 

 tenuissimo junctis, dextro intus subincrassato, coluraellari superne 

 breviter reflexiusculo, subtus incrassato, intus dente calloso inter- 

 dum munito. 



Diam. major 31, minor 27, axis 19 mill. 



Habitat in insulis Andamanicis. 



Detexit Major J. C. Haugbton. 



This is the largest Helix, and the most peculiar in form and 

 in the formation of the aperture, yet received from these islands, 

 the columellar callus in one specimen recalling the appearance 

 observable in some Mauritian Helices. In a second specimen, 

 this protuberance is more slightly developed. I am indebted for 

 it to Major Haughton, late Superintendent of the Andaman 

 Colony, now Chief Commissioner in Assam, whose search for the 

 laud-shells of the locality has added largely to our knowledge of 

 the island forms. 



2. Helix Gordonice, B., n. sp. 



H. testa perforata, orbiculata, depressa, tenui, superne oblique plica- 

 tula et minutissime striata, infra lseviore, subpolita, confertissime 

 radiatim striatula, striis nonnullis distantibus decussata, albida, 

 epidermide pallide cornea induta ; spira planulata, apice vix ele- 

 vato, obtuso, suturis impressis, late marginatis ; anfractibus 7, 

 lente accrescentibus, vix convexiusculis, ultimo ad peripheriam 

 superne compresse carinato, antice non descendente ; apertura 

 subobliqua, lata, angulato-lunata, peristomate vix reflexiusculo, 

 intus breviter incrassato, albo, margine superiore brevi, basali late 

 regulariter arcuato, prope umbilicum undulato. 



Diam. major 33, minor 30, axis 1 1 mill. 



Habitat in regione Birmanica prope Moulmein. 



Two specimens of this beautiful and delicate species, one of 

 which was imperfect, were kindly sent to me from Moulmein by 

 Mrs. Gordon, wife of Major-General Gordon, of the Madras 

 Army, with other shells previously found in that neighbour- 

 hood. 



