as 



.■\InN(i(!U APII 111' ISRITISH LANll ANli FRKSHWATEK MOLLTSCA. 



Cexus CLANTirNA Suliuiii.aclicv. 



(Olcacina, t:(_.lluii: IVilvphLiims, MumTurL; L'ui-lilicu|ia p;ir^, FOnissac). 



'I'lie ni'iiiis iiln^nVnni (dim. uC iiUiii^, a ghiiid) is ;i primitive grouii of 

 ]ireil;iiiiius sii:iils iit aciiatiuijiil oriyiii |ireyiiig cliierty iiiiuu the iiliyto])liag- 

 ciiis sjiecics, l)iit jilsn (leviHii-iiiL; siiiaHer individuals of their own kimi. 

 ^Vith(iUL;li thi'ir huad-i(iiait(.'is are imw in the West Indies and Central 

 America, where living forms are found scarcely separable from some uf our 

 Oligdcene fossils, yet a single well-marked species, Ulundina ahjlra, still 

 lingers in tlic l\[editerraneau region, the only surviving representative of 

 the numerous J]uropean species whose remains are found in the Eijceiie 

 and Miocene deposits of Uontinental Murope and the Oligi.icene beds of oiu' 

 own country; although two of the British forms are jiossibly erroneously 

 referred to the jiresent genus, I have not had the opportunity to make a 

 pcrs(Uial examination of the specimens. 



E.VTERNALLY, (Ahmdhui is cliaracterized by an elongate, anteriorly attenu- 

 ate liody : long oMjrAToi'HOHKS, with the evks liehind their deflected tips; 

 bullions .vNi'Kunriii TKNT.vcLKs; elongate and extensile i.ahi.vl pali's ; narrow 

 fiot. The siiKLL is long and fusiform, cif a lustrous white or h(jrn colour: 

 wiioiiLS six to eight; coh'mklla twisted and basafly truncate; apertukk 

 narrow, pkristo.mk simple. 



Intern.vij.v, they are destitute of the manluislk: the lingual sheath is 

 enormous, and the rahula furnished with obliquely arcuate jiosteriorly con- 

 verging rows of Acanthogiossate' teeth, with a slender uuicuspid median 

 n iw. 



Glandina costellata (Sowerby). 



lS'j;i I'.iiluiiii.-i costellatus Sdw., .Miii. t'diicli., i\., p. S9 liis, pi. WMi. 



ISlM) ]/innnrn iiii','ini'f Sow., Mill. (.'olK'li., \-i., |). ."),>, pi. .}-2.S, f. 1. 



IS.VJ Arlnilnn, ,;,.~:l,ll,,l,i F. E. Eilwards, M„n. Euc. Moll., \i. T,"., pi. 7, f. la-k. 



ISill Glandina m.^dlhihi \X. ]!. Xowtoii, Syst. List Edwards' Coll., p. '270. 



Sn Ki,T. oval-dl'lon^-, w itli a sniiiowliat aciUc 

 a|M'\ : \vn(U;i.s six, soincwlial (.-onvcx ami 

 trausvorsclv riLLed, tlic ribs lieiii;^ roinideil, 

 inogidar, rallier oliliipic mul thickened at the 

 MU\n-c's, giviii;,' tlieui a creinilato aspect ; 

 ci.'owin LINKS oliscinc. iiitorscctiii^ the 

 iililic|iiely loii;;itiidiiial lilibiii.n ; .VI'KirrUKE 

 narrow ami jivrifonii, leii;;tli, 'Al mill. 



Length of shell, UU mill. ; diaiii., ii mill. 



The existing sjiecies, (/. rKjiinriii> lleeve, 

 from Mexico, and ''/. i-nii-<j><rs<i I'fr., from 

 (Tiiatemala, resemble this spei'ies soelo.sely 

 that iStarkie (jardiier considers It ditiicult 

 to avoid uniting them. 



ENCLAXH AMI WALES. 

 Oligocene.-'— This speeies is imistly found 



ill the 11 bridge liineshnie stra.la, but \isii- 



ally ill the form of easts, the shell beiiiu I'arelv 

 pi l.'ser\ ed. 



/.sv. /: (>/■ \\-i,:ii I. 



llt.Allo.-^J SkIIIKS. .1. S. C.-i.ldlier, ( leol. M.-li;., ISS.'i, p. ■.M7. 



OsiioKXK Si':i;it;s.- -( '. Aslifoid, is.ss. 



r,KMIii;ilH:|.; Sk,i;ii:s. Inapi imi I li of mad, Sha,le<.iiibe (d. Sow..!\liii. roneli,, 



IS-j;), p. S!l bis). Slone ,|UaTries, I'.inslead, near Kyde, I'mf. Sed"wi,d<, KS2(i{Sow.. 

 .Mm. roiii-li., VI., p. ;-,:!, ISJ.I). Sroiiee and Headon Mill (Edwards, I.e., p. 7«).' 

 r.rmbridu,., Ileinpstea,d, Wbile.diint.av, ele., ('. .\slibird 1 ,S,S,S 



KiG. 13. 



(.'.'.I'i. ;'///, I Li>stc//i1tit (Sou-.y 

 ( Aflci ICOuards). Sli.claly reduecil. 



, e i;ii7, f. ,-,;i:i. 





