Mr. W. H. Benson on new species of Helix. 161 



6. H. radicicola, nobis, n. s. 



Testa perforata, subglobosa, tenui, virescente- cornea, translucente, 

 subtus nitidiori, radiato- striata, striis concentricis delicatissimis 

 decussantibus ; spira elata conoidea, apice obtuso ; anfractibus 4 

 convexis, ultimo obtuse angulato ; apertura obliqua, subquadrato- 

 rotundata; peristomate recto (acuto), margine columellari vertica- 

 liter descendente, supra late reflexo, perforationem semitegente. 



Diam. major 10 mill. Axis 7 mill. Mus. nost. 



Hab. prope Landour et Masuri, ad montes Himalayanos Mesopo- 

 tamia; Gangetica?. 



Obtained in the hollows at the roots of sycamores by Dr. J. 

 F. Bacon and myself in a dark and precipitous ravine running 

 down the north side of the Queinty range, behind Rockville, 

 Landour. A few were once found by Dr. Bacon on the leaves 

 of a shrub, poisonous to goats, called Aikhar, on the same range ; 

 and a single deserted specimen by Capt. Hutton in the deep val- 

 ley behind Mussoorie. The animal is obscurely variegated with 

 brown and whitish when seen through the shell. 



7. H. Trotteriana, nobis, n. s. 

 Testa imperforata, globosa, tenuissima, translucente, corneo-virente, 

 radiatim obsolete plicatula ; spira brevi, conoidea ; apice obtusato, 

 laevigata, rubente ; anfractibus 4 convexiusculis, ultimo ventrico- 

 siore ; apertura obliqua, ovato-lunari ; peristomate simplici, acuto ; 

 margine columellari filiformi, albido, polito, subverticali, leviter 

 arcuato, intrante. 

 Diam. major 19£ mill., minor 17. Axis 12 mill. Mus. nost., Cu- 

 ming, &c. 



It has much of the habit of H. ravida (mihi) of Chusan (Pfr. 

 no. 69), but is imperforate and differs in other important points. 

 It was taken alive near Uitenhage, South Africa, on the route 

 from Graaf Reynett, by Robert Trotter, Esq., Bengal Civil Ser- 

 vice (brother of the Commander of the late Expedition to the 

 Niger), who kindly undertook to collect for me in a trip from 

 Cape Town to the interior, and who got this new form in addi- 

 tion to others already known to science. 



In the ' Zeitschrift fur Mai/ for 1846, Dr. Pfeiffer states that 

 Helix Cestus, Benson, is H. similaris, Eer., of which H. Woodiana, 

 Lea, is another synonym. In his monograph, Cestus, Bens., also 

 appears as a synonym of H. similaris. Dr. Pfeiffer cannot have 

 seen an authentic specimen of H. Cestus from the N.E. frontier 

 of Bengal, but possibly one of Dr. Cantor's Chinese specimens, 

 which were referred, without sufficient examination, to that spe- 

 cies, as, although allied, the former is sufficiently distinct from 

 my specimens of H. similaris from the Mauritius and Southern 

 India, as well as from the Chinese examples of the shell which 



