336 Mr. W. H. Benson on Camptonyx. 



bellum purple at tip, and on each side of a medium greenish-yellow 

 stripe, edges greenish. Column purple at tip." (615.) 



Stem 9 or 10 inches high, erect; leaves 2-3 inches long. The 

 same plant occurs among Linden's collections, but no locality is 

 attached to my specimen. This is the largest of the published spe- 

 cies. There is one very like it in Schomburgk's Guiana collections, 

 but my specimens of it are scarcely sufficient for publication. 



N.B. Pogonia Cubensis, Rchb. f., found in Cuba by Poppig, is 

 not in Wright's Collection. 



XXIX. — Description of Camptonyx, a new Indian genus of 



Terrestrial Shells. By W. H. Benson, Esq. 



[With a Plate.] 



Camptonyx, nov. gen., nobis. 



Testa pileiformis, oblique conica, apice libero subspirali, oblique in- 

 curvato, versus latus dextrum spectante ; anfractibus l^, ultimo 

 paene totam testam efFormante; costa dorsahs carinseformis sub- 

 spiralis sulcum interiorem tegens, ab apice usque ad marginem 

 dextrum descendens ; apertura maxima, mediana, symmetrica, 

 regulariter ovata, integra, omni latere expansa. 



C. Theobaldij nobis. 



Testa (supina) cornucopiam simulante, tenui, concentrice rugosa, 

 purpureo-fusca, dorso ad latus sinistrum compressiusculo, costa 

 carinseformi subspirali, sulco postico adjecto, ab apice usque ad 

 marginem dextrum aperturee descendente ; apice obtuso ; apertura 

 ovali, intus purpureo-lutescente, nitida, peristomate acuto. 



Long. 10 ; diam. dorsali 4^ mill. ; apert. 8 mill, longa, 6 lata. 



Ad latera jugi montis "Girnar" dictse, Peninsulee Guzeratensis, in- 

 venit W. Theobald junior. 



This singular shell, sent to me by Mr. W. Theobald, jun., as 

 a cap-shaped Succinea, was found by hioi in abundance on the 

 central peak of Mount Girnar in Kattiwar, on the peninsula 

 which separates the Gulfs of Cutch and Cambay. He states 

 that these hills form an amphitheatre, with a central crateriform 

 clump, the peak rising to an altitude of 2500 feet. A piece of 

 the weathered rock forwarded by him contains, in a space of 

 2 inches square, twenty-six young individuals adhering most 

 tenaciously to the surface, like Limpets or Ancyli, with indica- 

 tions of the adherence of several larger specimens. The rock 

 sent is a small-grained syenite, with a few specks of mica. A 

 gigantic Succinea, 24 millimetres in length, and 15 in breadth, 

 and which occurred of a size larger by -j^jth of an inch, was 

 found abundant by Mr. Theobald on the same peak. 



Had Camptonyx been found in a marine locality, it would 



