A I) E R B I S. 



Plate I. 



Genus ADEORRIS, Wood. 



Testa orbicularis, depressa, umbilicata, alba ; anfrac- 

 tibus paucif, ultimo magna. Aperlura majiia, 

 peritremate interrupto. Operculum nullum. 



Shell orbicular, depressed, umbilicated, white ; whorls 

 few, last large. Aperture large, peritrcme inter- 

 rupted. Operculum none. 



The little wliite shells Ibrming thi.s group differ from 

 Ci/closlrema;, principally in having a more depressed 

 and less conical form, and in the edge of the aperture 

 being interrupted instead of continuous. The genus 

 was created for the little bicarinatod British species. 

 Most of the others have been collected eithrr by Mr. 

 Cuming in the Philippines, or Mr. Arthur Adams in 

 Japan. But the most beaulLlul species is Aihurhis 

 Anqasi from AustraUa. 



.Sp, 



(:mus. r 



Species 1. (Mus. Brit.) 



ADEOimis ELEG.^NS. Adc. testa lata, depressii, sjiird 

 subplanulatd ; ultimo anfractu latissimo ; labia 

 externa elei/anter supern!: sinuato ; umbilico magno. 



The elegant Adeorbis. Shell broad, depressed ; spire 

 rather flat ; last whorl very wide ; outer hp 

 elegantly sinuous above ; umljilicus large. 



A. Adams (Cyclostrema). Proc. Zool. Soc, 1850. 



Hub. Isl. St. Thomas. 



Species 2. (Mus. Mac Andrew.) 



Adeoiibis suiiCAiUNATA. Ade. testd moderate depressd; 

 spird pauld exscrtd ; ultimo anfractu supern!; sub- 

 angulalo, infrd, bicarinato ; aperlura ovatd ; um- 

 bilico mag,\o. 



The low-keeled Adeohbis. Shell moderately depressed; 

 sjure a little e.xserted ; last whorl a little angular 

 above, with two keels below ; aperture ovate ; 

 umbilicus large. 



Walker (Helix). Adeorbis carinata, Wood. 



Hab. British Seas. 



Adeorbls Adamsii. Ade. testd valde depressd, sinuatim 

 connentricl' lirntd; aperturd magna, oblique obtoiigd, 

 labia e.vterno supernl; moderate sinuato. 



Ada.ms's Adeorbis. Shell much depressed, sinuously 

 concentrically ridged; aperture large, oblique, 

 oblong, outer lip moderately sinuous above. 



FiscilEFt. Journal de Conchyliologie, 1857. 



Ilab. Guadaloupe. 



■Species 4. 

 A. Ade. 



(Mus. Brit.) 



testd valde 

 : umbilico I, 



depr 



Adeorbis blana. 



hitd, spiralite 



latiss imd, obliq ml. 

 The flat Adeoubis. Shell much dopresse 



broad, spirally striated ; umbilicus very 



aperture very wide, oblique. 

 A.Adams (Cyclostrema). Proc. Zool. Soc, l.Si 

 Hah. Philippines. Japan. 



Species 5. (Fig. a, b, Mus. Brit.) 



Adeoubis nitida. Ade. testd subelevatd, solidd ; spiru 

 conicd, anj'ractibus rotundis, distinctis ; umbilici 

 magna, circumscripto ; aperturd subrotuudd. 



The neat ADEOinus. Shell a little raised, solid ; spin 

 conical, whorls rounded, distinct; umbilicus large 

 defined ; aperture rather round. 



A. Adams (Cyclostrema). Proc. Zool. Soc, 1850. 



Hab. PhiIipT)ines. 



Species G. (Fig. a, h, Mus. Adams.) 



Adeoubis debuessa. Ade. testd latd, valdi: depressd, 

 laevigata ; spird subplanulatd ; anfractibus vix 

 exsertis ; umbilico mediocri ; ajyertiird parvd, siib- 

 ovatd. 



April, 1874. 



