OHOH b8, ii 1.1 i 



complete A m-\ |ocer;e : th< 1 two !_ieiier:i ^hoiild proki U \ l>e 



united. 



C. OR18TATTJM, d'Ork PI. Inn. Ii-. 522, (i:n\\\. XO////M-/-,/ 

 /''nnicf. 



u< CHORISTOCERAS, HMII.T. 



Shell like (Y/rov/s. lull tin- lol>e> creiinhitcd. 

 Four Nn-i-ir>. rx-r Tri.-issir. 



(it-nus HELICOCERAS, -I'Orl.. 



Shell spirnl. sinist rnl ; whorlfi Separate ; :miml:ir 

 niiiii1rrrii|>tc(ll\ vt-r llu- siplion:il side. 



Klrvrll s|rcics. Inferior Oolitic (?) to ( 1 rrtMCC(His. l\iii'nj,i\ 

 , I'niti'.l >S'/f//<-.v. 



Suhtrenus Patoceras, Meek. 



inti'rnipic<l on tin 1 siphonal side. h-;i\inu :i n:irr<\v. 

 s| ); icc :iloiiu' the whole length ol' the S.-MIU-. 

 II. TKIU.KI xii. d'Orh. PI. 101. !i-. :.i )( .). .lunissic. 



(J.-nus TURRILITES, Lam. 



Shell spirid. de]ressed to elongate, sinist r:il or dext nil ; snl nre-, 

 si\-|ol>e<l. t'oli:ite<l; :i pert lire ol't en irr 



Thirtv-sv-ven s|,ecies. (i.-iut: tO < 1 li:ilk. 



//liriH-rrd* L8 distinguished from this trt'iius lv its *'J:II I .MIM| 

 whorl>. 



T. C08TATU8, d'Orl,. PI. HH. Ii-. 530. 

 T. BOBLAYI. .rOrl.. PI. 101. li.ii-. 531. 



HETEROCERAS, .I'Orl.. 



Shell like Tun-ilit'-*. lull hist ch:nnl>ei' soinewh:it produced 

 :in<l reeiii-\-ed. 



Ki\ e -peeies. ( ' ret riccnlls. /-J H /<>/; I '/; ifi 'tl Sf(i>'- 



II. EMiaicii, d'Ori.. PI. inl. ti-. :.:'.-J. 



Helicancyloceras, ;ai-i. 

 Spire les> ele\:ited. \olntioii Ic-- decidedlv in contact. 



