Mr. W. H.Benson on some species of Cyclophorus. 411 



at right angles with the disk, and at others laid so closely upon 

 it as to be with difficulty detected. Barely the additional wing 

 is reduced to a reduplication of the wing of the disk through 

 more or less a distance. The disk is covered on each of its sides 

 with elevated ridges radiating more or less regularly from the 

 centre. The whole seed is black. 



XXXVIII. — Characters of four Indian species of Cyclophorus, 

 Montfort, followed by Notes on the Geographical Distribution 

 of the Genera of the Cyclostomacea in Hindostan. By "W. H. 

 Benson, Esq. 



1. Cyclophorus altivagus, nobis. 



Testa angustissime umbilicata, fere perforata, globoso-conica, solida, 

 striata, superne rufa, castaneo picta, subtus versus periomphalum 

 albida ; spira elevata, turbinata, acutiuscula ; aufractibus 5^ con- 

 vexis, superne costis spiralibus sex munitis, ultimo rotundato, ad 

 periphseriam vix carinato, basi laevigata, umbilico pervio ; aper- 

 tura vix obliqua, subovali-circulari, superne angulata, intus lutes- 

 cente ; peristomate duplici, interno continuo, valde porrecto, 

 acuto, externo expansiusculo, costam fingente, superne anguste 

 angulatim adscendente, ad anfractum penultimum late emarginato, 

 margine columellari minime sinuato, supra umbilicum angustum 

 dilatato-reflexo. Operc. ? 



Diam. major 31, minor 26, alt. 2A\ mill. Apert. intus 17 mill, longa, 

 15 lata. 



Hab. in summis montibus Mahabuleshwar Indise Meridionalis. De- 

 texit A. E. Benson. 



A single decorticate specimen was found by my son, Lieut. 

 Arthur E. Benson, Tenth Royal Hussars, after the close of the 

 rains of 1853, on the summit of the range of Ghauts overlooking 

 the low tract in which Cyclophorus Indicus occurs. It differs 

 from this species in its more elevated form, indistinct keel, rounded 

 last whorl, more elongate aperture, porrect inner lip, the absence 

 of any sinuosity in the plane of the aperture on the columellar 

 lip, less expanded outer peristome, and by the greater expansion 

 of the external columellar lip over the umbilicus, which is also 

 much narrower; and permits no view of the internal whorls. 

 The outer lip, at its junction with the last whorl, rises more 

 suddenly to a point than in C. Indicus. It is probable that 

 when in good condition the internal border of the aperture is of 

 an orange colour. In the specimen before me I can find no 

 trace of the close-set raised lines between the lira? which are 

 present in all my specimens of C. Indicus from Elephanta and 

 the Concan, however weathered. In one antiquated specimen 

 of the latter, with a porrect superstructed inner peristome, this 



