.ii ( loBl N \. \ \d .i!- 

 Klalely lurl'inatr. \\illi ..!. 



periftome duplieatr. oontiii 



lip with tliin, eallou- expansion and JI..M. 



I, 1 , i i r.i .i:< i i. ii i i: \. \ \ 



|l XI A M I'll I III \I.\M! -. < il 



Shell smooth, pupoidal, with lar 



the inner li|> produce* Mi )r\v;ir(l, \\iih :i i n. 



OUter lip joining it pi>teri>ril\ . -inl.|. ill i,, ((. ;i<lult 



C<i/ijn ruin, .1 ii.<ti'iiH<t, JUJKIII. l!.i\ ' :rj). 



, W:il-mi. 1 g Vli.xiyin. 



II MODULUS, Mmt>. i - 



Sliell sulx-vlindrical, with >l)tu>e >|.ire. wh..i 

 spinilly Mri:ite; aperture rounded, peri-tinie thick, eniitiuii 



i;. . 



njh'Hn \\\M\ 7V.N'/////'/. Mont.-, 1 S 7>. may !> nnit'd \\ith thi.n 



group. 



Si-.-ti(,n AN vr. \TIII:N. Frauenleld. U 

 Shell Bcalariform, with a carinated shoulder, impel ;M>th, 



aperture rounded, prristoine emit inu>ii-. I. 



PKLECYDIUM, Pischer, L872. 



Iniperl'urate, elxi--at<-, sul.an'iiated. finely -triate; \\ h,,rU *ome 

 wliat flattened, apex nianiillate : laM \\li..rl -mall, lescr-i 

 viatinir: aperture .-cmieiivulai d. nnii con- 



tinuous. >..inewhat thiekeiu-d. \\. \ 



ion Ih MKI-MMI \. ( 'I-M ., i - 



Impertorate, rl)nirated, thin, siimntli. >livae-. 



a persistent thin epidernii-, ap- \ nianiillate, nhtu-r; ajH-rture 

 little solute, peri-tome eoiilinii" 



\\. ( '\i i 



The ehar ip correspond mainly \\ith th'., 



pree,Mlin-Jf "lie. hut th' 



have led Dr. Fi-eh.-r ' ! ' in tin- I I 



pr.ive identical with IVleeydiuin. une will l)OCOme a 



svnunyin. The opereuluin of I [emifll 



