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



cornco, 7-spirato ; anfiactibus valdc aiigustis, suturis intus ct extus 

 pulchrc carinatis. 



Diani. major 24 . . minor 20 . . alt. 8 

 ,, 22 „ 18 „ 6 



» M 13 ,) 11 „ 4 



Ilab. 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 

 u|)per 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. Parma, 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 pei'istome and the flatness 

 of the apex at once distinguish it from C. Thwaifesi, 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 apicatum, nobis, n. s. 



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

 sublente spiraliter confertim striata, albida, interdum flammulis et 

 fascia unica infra periphseriam angulatam ornata, sutura profunda ; 

 spira conica, apice saturate castanco-nigrescente, acutiuscnlo ; 

 anfractibiis 4^ convexiusculis, ultimo ad perij)lieeriam obtuse angu- 

 iato ; apertura obliqua, rotundata ; peristomate duj)lici, interiori 

 expansiusculo marginibus callo junctis, exteriori breviter expanso ; 

 margine columellari reflexo pertbrationem fere occultante. 



Diam. major 10^, min. 9, axis 9 mUl. 



Ilafj. ill Insula Ceylon (ad portas Curuwitty dictas provincite 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- 



