1S60.] Contributions to Indian Malacology. 123 



toma with operculate forms, and until further evidence shall shew 

 such a view to be untenable, we may regard the present as one more 

 of the peculiar Cyclophoroid genera which seem specially to charac. 

 terize the Indian and Bornean provinces. 



2. — ALTCJ3US EXPATKIATUS, 11. S. 



Testa mediocriter umbilicata,depressa,ad anfractos internos ohsolete, 

 ad ultimum fortius, ad spatium inflatum valde, crebre costulata, 

 corueo-albida, apice diaphane rubella ; spira vix elevata, apice obtusa ; 

 sutura impressa ; anfr. 3^- convexi, ultimus ad latus mediocriter in flatus, 

 deinde constrictus ; constrictione longa, medio tumida, glabra ; tubulum 

 suturale pone constrictionem oriens, mediocriter longum, plerumque 

 4- peripheriae subaequans, sed nonnullis exemplis brevius ; apertura cir- 

 culars, obliqua, juxta anfr. penultimum retro curvatum ; perist. du- 

 plex ; internum breviter porrectum, continuum, externum expansum, 

 intenuptum, columellari margine strictum. Operculum corneum, dis- 

 tincte multispirum, anfr. 7-8 planulatis, externe perconcavum, nucleo 

 centrali interno prominente papiilari. 



Diam. maj 4| m. m. 



Ditto min 3f ditto. 



Alt 2\ ditto. 



Apert. diam.. If ditto. 



Hab. Haud raro ad Neddoowuttom ghat, ad latus septentrionale 

 montium "ISIilgiri" Indise australis ct circa 3000 — 4000 ped. alt. 



This species appears to be more depressed in the spire than any 

 other of the genus, except perhaps the Bornean A. spiracellum, 

 A. Ad. and Reeve. Its nearest Indian ally is A. strangulatus, Hutton, 

 and in size it is intermediate between that species and A. stylifer, Bens. 

 It belongs to the section CJiarax of Benson, having a wide strangu- 

 lation behind the peristome, crossed by a swollen ridge, which, how- 

 ever, in A. expatriatus never presents the sharpness so remarkable in 

 A. stylifer and Jiebes, but is rather a broad tumid space separating 

 two narrow constrictions. The sutural tube is variable in length, 

 sometimes being nearly as short as in A. strangulatus, in other 

 specimens as long as in A. stylifer ; the latter being the usual case, 

 the former the exception, but both occur in perfectly fresh and full 

 grown specimens. 



