GUDE ; ON THE ARMATURE OF LAND MOLLUSCA. 55 



parallel, prominent, deeply entering, revolving, white lamellae ; on 

 the other hand, G. suppressa, Say, is furnished only with one or 

 two lamelliform, elongated, oblique teeth. 



Genus Sesara, Alb. 

 Is restricted to India, Burma, and Siam ; some sixteen species 

 are known, the majority of which are provided with teeth in the 

 aperture. The simplest form in this respect is S. helicifera, Blanf., 

 having only one long, curved, entering fold on the columella, 

 while S. harmeri, Gude, is furnished with two raised, curved, short 

 lamellae on the base of the peristome. S. ticJcelli, Theob., and 

 S. hungerfordiana, Theob., have a narrow aperture, with three teeth 

 on the base of the peristome and one curved fold on the columella. 

 S.megalodon, Blanf., also has a curved, entering fold on the columella, 

 a small tooth on the outer lip, and a larger horizontal one on the basal 

 margin, with a large, transverse plate between. S. mouleyitensis, 

 Gude, is furnished with a large, curved, transverse plate near the basal 

 margin, supported by two buttresses outwardly, and an entering, 

 curved fold on the columella. In S. pylaica, Bens., no teeth are 

 found, but the parietal callus has a raised lamella meeting a similar 

 one on the basal margin, leaving only a narrow slit between. 



We now come to an important group, i.e. the Endodontics, the 

 first to be considered being the 



Genus Sculptaria, Pfeifier. 

 Only four species are known, with two or three varieties ; they 

 are small shells, characterized by their beautiful sculpture, and 

 confined to Damaraland, South- West Africa. S. sculpturata, Gray, is 

 provided with a long, entering, raised, flexuous fold on the parietal 

 wall and two horizontal, raised lamellae on the palatal wall, while 

 S. damarensis, H. Ad., has a similar fold on the parietal wall and 

 three raised, horizontal lamellae on the palatal wall. S. retisculpta, 

 Mts., the most beautifully sculptured form of all, has likewise a 

 parietal fold, while the palatal wall is furnished with a strong, 

 transverse ridge on the outer wall close to the peristome, raised into 

 a tubercle on the base. 



Genus Endodonta, Albers. 

 This important genus, with numerous species, distributed over 

 Australasia and Polynesia, has been split up into several subgenera 

 and sections. The first subgenus, Diglyptus, Pils., has but one 

 species : E. pagodiformis, Smith. It is furnished with a strong, 

 entering, parietal lamina and two close columellar plicae, terminating 

 in a large callous nodule on the columellar lip. The subgenus 

 Stenopylis, Fult., consists of three or four species of minute shells 

 from the Philippine Islands, Australia, and New Guinea. One of 

 these, E. coarctata, Mlldfi., was originally placed in the genus 



