I MM Ml \. JIT 



Sni.u"'iiu> Temnocheilus, M.-I 



Shell carinated. with :in open, conical umbilicii-. 

 l''i\e species. ( 'arb. lime-tour. 

 .1'. 1:1 \N;I I.NTI 9, So\\b. p|. '.is. tig. .',11:;. 



Siil.rciiu> TremitodisCUS, M<- k :in<l \Vurt tn-n. 



Like Temnocheilus, but dorsal or outer side of whorl- with 

 revolving angles Mini sulci. :uxl frequently. n-volvinir ^trin- 



( \-irl>oiiit\-roii>. KII !<>!>, ; America. 



T. |'Ki>ri,c ATI s. MrrU :in<l \\*oi't ln-n. PI. '.is. I'm-. ."o I a, 6. 

 (:irl)onit\Toii^. i:<-l,-l'<-<L /ml. 



StiKiMims Cimomia, ('unnnl. 



Scptn sinuous, double \YMvnl 01- sio-nmiil. numcious; si 

 small, central. 

 N. KiiJToM. (Jalcotti. IJ)\VIT 



S:ir_'-nns HercogloSSa, C.nra<l. 



Septa aiiLiiilar and liniiiiit'onn ; ;I|H I X of the anu'lc or longue- 

 lolic not contiguous witli the adjacent sejttiun : siphon 

 or moderate, situated within the centre, or between the 

 middle and the inner margin, and not dorsal or funnel-shaped. 

 hut tubular and gradually tapering. 



Kocelie. ('ret. /','/' /'o//r ; Autt-rictt. 



A very doubtful group, as Conrad, includes species having 

 respectively the characters of Aturia and of Nautilus; the 

 type species, however, A'. rl>i<-ul(itux of Tuoiney. has not been 

 figured. 



us Pseudonautilus, .Meek. 

 Dilfrrs from //.,<;, ,//,,.<*<! in the >epta b-ing |)rovided with a 

 well-defined peripheral and ant {peripheral lobe, and the siphniicle 

 placed near the outer margin. 



NAI TII. i - (' i IMT/I. Op|iel. 



Cryptoceras, -ro r h. 



Planorbiform ; septa arcuated, without lobe> oj- sinnnsit ie- ; 

 siphon dorsal. 



T\\<> species. I>c\>nian. Carboniferous A' 



C. sri',rri',KK< i i.\ i i g, d'Orb. PI. '.is. |j,r. ;,n4. 



