1870.] Descriptions of some new land shells. 397 



bus confertissimis ornata ; apice glabro, rufescente, elevatiusculo ; 

 anfractibus quatuor, convexis ; tubulo suturali modico, quartam 

 peripheric vix sequante ; strictura brevi, laevigata, striis nonnullis 

 costiformibus ad basin et costa crassa transversa notata. Apertura 

 parum obliqua, subrotundata, fere soluta, labro externe modice 

 expanso, lamellose undalato, ad marginem paulo incrassato, 5-inciso, 

 lamella supera maxime producta ; labio simplici, panio arcuato, 

 supra vix adnato ; operculo corneo, margine elevato nucleoque cen- 

 trali parum excavate Diam. maj. .21, diam. min. .20, alt. .21 unc. 



Habitat : Shan States. 



This is a remarkably fine species with the crenulated lip of A. 

 plectocheilus much exaggerated. 



Alycseus Feddenianus, n. sp. PL XVIII, Fig. 4. 



Testa globoso subturbinata, profunde umbilicata, glabra, in ulti- 

 mo anfractu ad suturam peculiariter deplanata, deinde subangula- 

 ta et infra angulum levissime convexiuscula seu planata et angustata, 

 solida, brunnea ; anfractibus 3£, rapide crescentibus, superioribus, 

 convexiusculis, ultimo supra et prope umbilicum angulato ; tubulo 

 suturali tenui, prope aperturam oriente et fere dimidium ultimi 

 anfractus in longitudine sequahte ; strictura brevissima, vix conspi- 

 cuca ; apertura circulari, carneola, supra angustissime adanata ; 

 perist. duplici, interno integro, tenuissimo, externo breviter ex- 

 pansiusculo et renexo. Diam. maj. .20, d. min. .16, alt. .16 unc. 



Habitat : Shan States. 



This shell is an interesting addition to the Dioryx group, the 

 only other Pegu form being A. ( Dioryx) amphora, B., first procured 

 by myself at Moulmein. The latter is a very variable shell in 

 size, unless two forms have been confounded under it, and Mr. 

 F e d d e n ' s collection contained two examples of it from the up- 

 per Salwin, but I have not the means of re-examining these just 

 now. 



Out of four species of Alycceus, collected by Mr. F e d d e n, three 

 are new ; so that when greater facilities exist for examining this 

 region, we may look for large additions to this very interesting 

 genus of operculated land shells. 



