U N I 



Flij;. 279. (Mus. Angas.) 

 1) Stuauti. The specimen here figured, beinp; fiill- 

 jj'rowii, more eompletely imlirates the chiiraetrrs of 

 ihis species than that represented in Plate LIV. 



Species 2S1. (Mus. Ta\lor.) 



L'niO MeXICAN'US. I'll. Ii-sfd iinih'i. riiiiijimsa, riiuiplii- 

 nntd, mfiis exluxijui' ml iii.ihiiiicH ^uluiiiiirii, iii/ii\ /im/ii' 

 iimr/jines aryi'iitfii, r.rfiis i'/iii/i-n,ii(/i' ulinicni imliilii ; 

 lali-re fiiitiro bn-ri, rnurenl rir:- riiijiih, ; l„l,i:' iinslini 

 siibrnslnil,,, nhliiiii? Iiiaiifiiiliil.i, ,ii„r^iii,' ,/,i,-<„/i roii- 

 ri'.vo. ii/fin/iiii' veiilruli cFijinililrr an-inila, ileiitibiis 

 vnis^is, viiiboiiibns lu'imiiiiiiti^. 



The JIeXICaN Umo. Shrll ov;d, compressed, thittrned, 

 -nluion-tinted within and without at the uuiljoes, 

 -dviiv ni'ar tlic margins within, covered externally 

 witli an olive rpidcrnns; anterior side short, concen- 

 trically wrinkled; posterior side subrostrated, ob- 



que 



bia 



ith dorsal nuiruin convex, ventr 



Till ecpially arched, teetii thick, umboes acnmi- 



II„h. Mexico. 



No species .ippcirs to have been hitherto described 

 pnssessina; the jiecnliar eliaraeters exhibited in this speci- 

 men. The salinon-tinted and silvery interior is very 

 beautiful, and the flattened surface remarkable. 



Species 282. (i\rus. Angas.) 

 1) \N(iAsr. Uii. ti'xtd obhjiKjd, .vibrhomhoiden, triiiii, 

 hrriiiiil,!, riiiili-riiitJi- olixrurd vdiireiilrir}. driald iii- 

 ihihi, i,ilini;rn,U'd, deiilibiis li-iiiiib'is tniiii/ia/is ; latere 

 iiiilicii bn'i-i, iiiii/iis/ii, iiiiii-ijiiii; ihirniiti. recto, siihde- 

 rl'iri, iiicdiii iiiiinjiiii- n-iilnili rrrto ; liitcre podico 



hlln, xHb,l,l,Jlllilh>, iiianjiiir dnrsilli rJi'l-illn, rrrliuxfliln, 

 uiariinir hitrnili „blh,iw. i,i,di„ rniirnrn, Irriiiiiio siib- 

 Iniiiriito, iniiljoiiibiis henbiix. sn/ih'r/in-.ssi.s. 



nml.ni.lal. Ih 

 ntrirallv st rial 



at the end, umboes smooth, siib(h-pressrd. 

 Lea, MS. 

 Ilab. Strangways River, North Australia. 



Species 2S3. (Mus. Taylor.) 



UnIO CAMEI.Us. I'll. ti-\ld rravui, piiiidcroxd, xidirnii- 

 foriiii. r/iidn;,iidr fiincd, iinxl'in- liiirix ii'iyris rrnlnild, 

 'hidnld, iiiHis albd. ,i„njiii,' rnrdninll iiiriunxalo. dni- 

 lUlllx rrasxis; t.llrrr Ulllini brrri, tillllidn, iiianjillf 

 itui-siili .sii/wnir r/rnilo, dr'nide drrliri, i.innjiii,' reii- 

 trnli .s„i:s,i.,i nrrlin, i.irdio drpn's.o. iiianjni,' mitral, 

 siiiiintii ; lali'rr pnsti,-u tiiiijiiliilo, altniiiiilo. nb<ri,i-r 

 iniijiihilii, Irnniiio (iriii.iiniitu, i,i,irij'iii,- dnrsali thuiijiiln, 

 nhliiiii'f di-rli,-;, riijiiuU-iiU, hiiixUiio. 



The camkl Unk.. Shell thick, |Hm,hT..ns. lalher kid- 

 margin thickened, tn-th llnek ; .-intcrinr si,!,- ^hort, 

 tumid, with .lorsal nnirgin elr^ntrd ;d.uM-, tlirnee 

 sloping, ventral margin sloping iipu.irds. middle ,k-- 

 presscl. with ventral margin s,,„iated ; pnstenur 

 side tongue-shaped, attenuated, obscurely angular, 

 acuminated at the end, dorsal margin elongated, ob- 

 liquely sloping, ligament very large. 



Lea, .Vunr. Phil. Trans. 5. I. L^i.* f. 4."). 



Hub. Kiv.n- (Ihi... 



.V very ponderous species, with olili.pie, tongue-shaped 

 termination; the dorsal margin is elrv.-itr.l inti> a -wrlling 

 protiil)erance above the uiiilioe.>. 



June, 1SG7. 



