Mr. W. H. Benson on new Terrestrial Shells from Ceylon, 95 



corneo, 7-spirato ; anfractibus valde angustis, suturis intus et extus 



pulchre carinatis. . y 



Diam. major 24 . . minor 20 . . alt. 8 w 



,. »j >j 22 „ 18 „ 6 



3eori3 8B^«v ^_ ^^13 _^ 11 ^_ 4 



H"^5. in' Insula Ceylon. 



There are five good specimens in the cabinet of Mr. Edgar 

 Layard, of which the largest only has irregular streaks on the 

 upper side. I find a single dead and bleached specimen among 

 some Cingalese shells received from Mr. Frederick Layard. The 

 operculum is more closely wound than in C. Parmtty from which 

 it differs in colour, the form and position of the aperture, 

 sculpture, and deeper umbilicus ; this part is shallower than in 

 its near ally, C. annulatus, Trosch., which exhibits, moreover, a 

 prominent dark apex to the spire, whereas in C. Cratera the 

 apex is flattened and white. The variation in size is con- 

 siderable, as may be seen by reference to the measurements. 

 The smallest variety exhibits the adult character : the narrow 

 volutions of the operculum, and a darker corneous hue than in 

 C. Parma, are constant. Its double peristome and the flatness 

 of the apex at once distinguish it from C. Thwaitesi, Pfr. Of 

 three specimens of C Bairdii, Pfr., contained in Mr. E. Layard's 

 cabinet, two specimens, well variegated with chestnut, show 

 no indication of a keel, while a pallid variety exhibits it di- 

 stinctly. 



Leptopoma apicatumj nobis, n. s. 



Testa subobtecte perforata, globoso-conica, tenui, oblique striatula, 

 sublente spiraliter confertim striata, albida, interdum flammulis et 

 fascia unica infra periphaeriam angulatam ornata, sutura profunda ; 

 spira conica, apice saturate castaneo-nigrescente, acutiusculo ; 

 anfractibus A\ convexiusculis, ultimo ad periphseriam obtuse angu- 

 lato ; apertura obliqua, rotundata ; peristomate duplici, interiori 

 expansiusculo marginibus callo junctis, exterior! breviter expanse ; 

 margine columellari reflexo perforationera fere occultante. 



Diam. major lOy, min. 9, axis 9 mill. 



Hab. in Insula Ceylon (ad portas Curuwitty dictas provincise Suf- 

 fragam ?). 



This Leptopoma may be distinguished from any of the 

 varieties of L. vitreum by its angular periphery, dark apex, more 

 convex whorls, deeper suture, double peristome and parietal 

 callus, as well as by the reflexion of the columellar lip over the 

 perforation, and of the narrow lip above it. It is deficient also 

 in the angular projection observable on the lower part of the 

 same lip in that species. The label which accompanies the 

 three specimens in Mr. E. Layard's collection gives only the 

 general habitat as Ceylon ; but Mr. Layard's remarks on a 

 small Cijclostoma, 4^ lines in height and diameter, and pre- 



