a LeNeS, 
PuiateE I. 
Genus ATYS, Montfert. 
Testa sub pallio animalii celata, ovata vel cylindracea 
plerumque alba, solida, transverse supra et infra 
medium striata ; spird celata ; columelld tortuosd ; 
labium externum ad terminum supra spiram 
elevatum, supra medium subcontractum. 
Shell concealed beneath the mantle of the animal, 
ovate, or cylindrical, generally white, solid, trans- 
versely striated above and below the middle; 
spire concealed; columella tortuous; outer lip 
elevated above the spire at the end, more or less 
contracted above the middle. 
The typical species of this genus, Atys Naucum, is 
the well-known Bornean and Philippine oval white 
shell. These localities, with Ceylon and Australia, 
produce nearly all the species. 
small species found in North America, one in the 
Mediterranean, and one (A. Cranchii) on the coast of 
Devonshire. 
But there are a few 

Species 1. (Fig. a, 6, c, Mus. Brit.) 
Arys Naucum. At. testd inflata, ovata, subsolida, 
epidermide tenwi indutd, sublevigata, spiraliter 
striato-sulcatd ; sulcus subdistantibus, medio sub- 
obliteratis ; columella tortuosd, obliqué truncata, 
subumbilicatd ; apice subumbilicato ; aperturd 
magna ; labio externo supra elevato, cuneato. 
Tue Not-sHeatu Arys. Shell inflated, ovate, subsolid, 
covered with a thin epidermis, rather smooth, 
spirally striate, sulcated; sulci subdistant, sub- 
obliterated in the middle; columella tortuous, 
obliquely truncated, subumbilicated; apex sub- 
umbilicated; aperture large; outer lip elevated 
above, cuneate. 
Gmetin. Linneus, p. 3424. 
Hab. Borneo; Philippines. H. Cuming. 

Species 2. (Fig. a, 6, Mus. Cuming, in Mus. Brit.) 
Arys FrrRuGINOSA. At. testd ovatd, inflata, tenwi, 
utrinque subumbilicata transverse sulcato-striata, 

medio gibbosd sub-carinatd, longitudinaliter strigis 
Jerrugineis undulatis ornata ; labio interno supra 
anfractum ultimum rectiusculd, columella tor- 
tuosd; apertura magnéa; labio externo elevato, 
cuneato. 
Tue FERRUGINOUs Atys. Shell ovate, inflated, thin, 
subumbilicated at both ends, transversely striated, 
gibbous and subcarinated in the middle; longi- 
tudinally ornamented with ferruginous undulated 
stripes; inner lip above the last whorl rather 
straight; columella tortuous; aperture large; 
outer lip elevated, cuneate. 
Cuemn. Hist. Conch, i. tab. 22, f. 209, 210, 
Hab, (?) Mus. Cuming. 

Irrespectively of the longitudinal, zebra-like mark- 
ings, this shell, although thinner, very much resembles 
the preceding species. 

Species 3. (Mus. Brit.) 
Atys ovomwrEA. Af. testa solidd, albd, utrinque leviter 
umbilicatd, supra et infra medium spiraliter 
sulcata, medio gibboso, subcarinato ; columella 
rectiusculd, labio externo medio subangulato. 
THE ovo Artys. Shell solid, white, slightly umbi- 
licated at both ends, spirally suleated above and 
below the middle, gibbose in the centre, and sub- 
carinated; columella rather straight, outer lip 
slightly angular in the middle. 
Quoy. Voy. Astro. pl. 26, fe. 17, 18. 
Hab. Island of Guam, Australia. J. B. Jukes, Esq. 
This may be only a dwarf variety of Atys Naucum, 
which it resembles, except in respect of being shorter, 
thicker, and angular in the middle. 
Species 4. (Mus. Brit.) 
Atys souipa. Aé. testa cylindraced, solidd, alba, supra 
et infra densé spiraliter striatd, utrinque subum- 
bilicatd, medio gibboso, subcarinato ; apertura 
elongata, columella arcuatd, labio interno supra 
anfractum ultimum tortud, ad terminum cuneato ; 
labio externo ad medium angulato. 
April, 1869. 
