Hi i:oM \. MI \. ... KRA8, ' 

 Ormoceras, Si 



Si|llllliclll;ir l>e:nU d ill the middle, ^o th.-i! the * 



Mppe'ir afl il' imi'ed in ihe eelilre of e:irh. I ' r >l >:i I ! y idenlie:d 



,wi t h Actinoc&rcm. 



Three peeie>. L. Sihui:in to 1 >c\ OII'IMII. \. Aui-rirn. 



o. I'. \N I-IKI.I.I. Stokesi I'l. '.<;. DO-. 171;. 



Huronia, 8tol 



Shell c\ i rcinch i hiu. membranous or horn v ( ' x ). Siphuncle \ -i \ 



large, central, upper poi-'iun <>!' c:i<-l] joint iiill:iU'<l. coniit-c: d| 

 \vi h :i sinrill ecu r.-il . nlr liy r:nli:il inii' |>I:iU--. 



'Three s|>eeies. |,. Silnri:ui. I>rn mnimul hi.. //. llnrnn. 



r>ii:illy ihe siplmix-le only is preserved. Dr. IJi^sliy <>lserve(l 

 specimens six I'eel in len^ili. Doiihti'ully <listinci from Ai-timt- 

 ceras. 



II. \ KKTKI'.I! AI.IS. S:oke>. I'l. Hi. liti'. KT. 



Aulacoceras, Hiiiu-r. 



Shell iniieh thickened, longitudinally I'nrrowed. with two deep 

 Inlernl sulc:i , MIIS : siphon \ci'y sinnll. ni:irii'in:d :ind dor>:d. 



Tolll- >|>ecies. I'ppei' Tri:issi<-. Aiifi/fid. 

 A. si LCATUM, llniu-r. IM. .K;. li-. 4TS. 



Bathmoceras, IJiirnm !<. 



l';irt of i he body-chamber occupied l>\ imbricating pl;iie>. d- 



ere:isinu' in hoi'ixontnl extension IVoin In-low npwnnls; sipliiiiH-lc 

 :t -eries of su peri in posed l'iiniiel-sh:i | t'd inlies. 

 Two -perie^. Middle Silni'i.Mi). Bohemia. 



Endoceras, Hfll. 



Shell extremely eloiiLLMt 'd. ey lindrie:d. Siphnneh- ver\ l:ir-.-. 

 -yliinlric:il. l:itei-;d ; thicUi-nel inlernnlly l.y re|H';iie.l hi\er> uf 

 shell, or pni'tit ioiied oil' liy t'nnnel-shnpeil tli:ipln ::-jin-. 



T\\fl\- -pecie-. L Siliiri:iii. .V-/r }'<>rk. 

 I-:\IMM KI; AS. Ide.-d section. IM. H;. li- 47*.'. 



K. IM50TKIKOHMK. ll:lll. I'l. Ull. li U . [SO. 



