GUDE : NEW SPECIES OF HELICOID LAND SHELLS. 



15 



white, polished, thickened and strongly reflected; the columellar 

 margin triangularly dilated and covering the narrow umbilicus. 



Diam. maj. 23.5, minor 20.5 ; alt. 17 mm. 



Hah. — Mont Ascuncion, Paraguay. Type in my collection. 



The nearest ally of this shell is E. esfeJIa, d'Orb., the type of the 



latter is in the British Museum, where, through the courtesy of Mr. 



Edgar A. Smith, I have been able to inspect it. The shell is much 



more depressed than that of the present species, especially in the 



I. 2. 3. 



body whorl ; and there are onlyffour whorls, which are strongly mal- 

 lealed. U. dovmeri is further distinguished from E. estella by its less 

 dilated aperture, the presence of the dark subsutural band, and the 

 deep deflection of the last whorl. 



The species is named in honour of the late Lord Dormer who 

 collected the shells. 



Sesara mouleyitensiS, n. sp. Figs. 4—7, enlarged. 



Shell imperforate, semiglobular, corneous brown, finely and regu- 

 larly ribbed, paler and nearly smooth below; embryonal whorl smooth. 

 Spire convex; suture shallow; apex rather prominent, obtuse. Whorls 

 nearly 7, increasing slowly, the last gradually receding below the 

 4- 5. 6. 7. 



penultimate, rounded, not deflexed in front ; deeply impressed at the 

 umbilical region. Aperture subtrapezoid, nearly vertical. Peristome 

 white, strongly thickened and slightly reflected; looked at from below 

 it has the shape of a note of interrogation. Inside the aperture on 

 the palatal wall is a strong, stout, horseshoe-shaped fold, extending 

 over nearly the whole of the basal margin and having the concave 

 side outward. On the columellar margin occurs a narrow entering 

 fold. 



