S T O yi A T E L L A. 



Genus STOMATKLLA, LamanL: 



Testa phiA 

 fnu'tu 



wjn 



raliter 



ij'ornii, spira pnrrti, iiltim 

 pertiiru mi 



ultispinik. 



oblique tloiigata, Hdcira, iilili 



Opercuhim orliciilmv, ti-nur, conn i 



Shell more or less auriform, with small sjiire and large 

 body whorl, spirally ribbed ; aperture large, 

 obliquely elongated, pearly, iridescent. 



Operculum orbic\ilar, thin, hnrny, many-wliorled. 



It is a (jUestion of convenience whether this genus 

 should or should not include the shells separated under 

 the name of Stomatia. The differences in the shells of 

 the two genera are not great, consisting mainly in the 

 I)resent genus not being wrinkled at the suture, like 

 tlie Stom(iti(r, and not liaving jironiinent spiral tubercu- 

 lar keels. The presence of an operculum in Stomatella 

 and its absence in Stimuttia, would, if it eoidd be 

 established, be a very important distinction. The 

 typical species is from Torres Straits, and two or three 

 are Australian, but a ver}' large proportion of the 

 remaining .species find their habitats among the Philip- 

 pines. 



Species 1. (Mus. Brit.) 



Stojiatklla fulguhans. Sto. t(ft''i .<uhorhiculari, sub- 

 depressi'i, fiilni, lineis ohliquis J'usco-(jrise$centihus 

 ornatd ; .'^pird acuminata; anfractihus tcnniter 

 liiatis ; ultimo aiijhictn siihp, r/'onitii. 



Tiiii Lightning Sto.matei.la. Shell suliorbicular, 

 subdepressed, fulvous, ornamented with oblique 

 brownish-grey lines ; spire acuminated ; whorls 

 finely ridged ; la.st whorl partly perforated. 



A. Adams. Proc. Zool. See, ItSSO. 



Ilab. Isl. Negroes, Phillipiues. 



Species 2. (Fig. o, b, Mus. Brit.) 



Stomatella .saxguinea. Sto. testd depressd, ovatd, 

 crassd, rubrd ; costis moniliformibus distantihus 



'iriiald; x/iir^t aidiai-umiiiat,"!, aiifrai-tihiis ictuiidis ; 

 aprrturd lata ; labia intcnio lato, alba, uliliqiui, 

 valdc amiata. 



The ULOOD-coi.oruEi) Sto.m.\tella. Shell depressed, 

 ovate, thick, red ; ornamented with distant beaded 

 ribs; spire subacuminated, whurls rounded ; aper- 

 ture broad ; inner lip Iimad, white, ol)lique, much 

 arche.l. 



A. .Adams. Proc. Zool. Soe., l.S.'iO. 



Ilab. Isl. Ticoa, Philippines. 



ro is no difficulty in recognising this neat 

 ike si.ecies. 



ittle 



fFig. a, b, .Mus. Nobis. 



■e macula'.) : 

 riilati.1 laiud pr 



,1,1. 



■itl: liratd: 



apeiiui-d ovatd; columella albd, planidald 



obliqtid. 

 Tin: I'APYi'.ACEous Stomatella. Shell smooth 



globose, thin, ash-coloured, brown or red, v 



with brown or black ; spirally ridged, not 



nently, with smcoth, brown-spotted ribs; 



acuminated ; aperture ovate ; columella 



flattened, very oblique. 

 Chemnitz. Conchylien Cabinet, PI. 18l', f. IS 17, 

 Stomatella tumida, Gould. 

 ILib. Australia. 



spire 

 white. 



Difl'ering from all the rest 

 slightness of its stnu-ture. 



he smoothness au^ 



Species 4. ( Fig. a, b. Mus. Brit. ) 



Stomatella haliotoidea. Sto. tcstd depressd, ubliqai: 

 subavriformi, fenui, fusco, rufo-alboqne vurii: 

 pictij. ; spird acuminata, anfractihus planiasculis. 

 sj)iralitcr costalis ; aperturd lata. 



The haliotis Stomatella. Shell deiiressed, obliquely 

 rather auriform, thin, variously painted with 



April, 1874. 



