

OHORKT] - ii"M LLOOYfl \. :!'.'. 



smooth; whol'l- I ", Vt-ry r..ll\. \, with d',.p -lltlliv; ii|i -i; 



everted partially OV6t the iimliilim-. Lrn-ih, i mill. 



fill' M'irfli'i' I 

 Keivnt .-peeiniens Bgree \\-ll in lonn an. I -inirtinv \vit ; 



named Canadian pott-pliocene foesil ; they are, l> Ahat 



lai'Livr, and thinner, ami \Yrrill ha- ROOOrdiDgly -ivrn thnn th- 

 varietal nainc of TKN 1:1: \. 



Family HOMALOGYRIDM 



Genus II()MAL(M;Yi:.\..IrHivy- 



H. LTOMUS, Tliil. PI. 61, fi-rs. 4-15. 



Discoidal, planorhit'orni, very widely umhilicatc.l, -pirr d< -pressed 

 ratluM- thin, ftemipellucid, smooth, slightly arciiat<-lv -tria; 

 what shining: wlmrls 4, convex, rapidly enlarging, with dcej> -titurc; 

 lip thin, simple. Diam. 1 mill. 



/ope. 



It is Skeneu niti<ll**hini, I-'orln- imd Hanlev. //. 91 

 v a is. jt,i//ttl<! and />o///"n,i>i, lirusina, and Var. vforea, Dtijtrey. 



H. ROTA, Forbes and Hanlev. IM. '>! ti-j. 7. 



Discoidal, flat ahove and concave helow. very smooth, -uhpelliicid, 

 shining, with short radiating rihs ahove and helow, enlarL r iiiL r and 

 curving from the sutural line, and not extending to the peripi 

 whorls .">, convex, with deep suture. Diam. "> mill. 



If. jni/rhr/!,i, and H. paucicostata Costa, :in<l A<b'o,-l> 

 \Yeink. are synonyms. 



II. risciii:i:i\NA, Monts. IM. (il, fi.^s. 8, '. 



Planorhitorm, discoidal, fulvous, with three >piral hrown li 

 whorls 4, with -liirht, numerous, incremental stria. 



Diam. 1 mill. 



M"i n Sea. 



II. DEN8IC06TATA, .leilrey.-. IM. 111. ti--. K>. H. 



Planorbiform, Bemitransparent, ^Io.-.-y. m-arly flat al><>\ 



helow, with close-set incremental .-tria-, finally lecomin^ mi' 

 whorls 4, rapidlv iiu-n-asiu^, tlie la-t one with a central carina on 

 the upper and lower >iirface-. and another on tin- 

 narrow, hut excavated. Diam. 1' S 7 " mill. 



O/ \,;ri'<,,u,,l/,i,i<l. \i\-2-2 I'm.-: CtijH 



'Hie last locality is for >'///// '/ fri/l.i: Pm-h, \\hich to me 



to ho a better in-own .-..nditioii of 



