0184 OfiC M'li i i I .-. <.o\i \ i i i i -. i pc. 



Siii 1L '.ini> MacroBcaphites, M k. 

 Shell \\illi inner lunis inerelx in runt :id . ..r -o -li'jhtly emlira 



i-inu as to lea\e :i very l:uu'. ^hallou inn liilini- : peri phery 

 rounded : liody portion nnn-li extended from the iniirr volution-; 



costate. 8. 3i<3 UB, s.\vii. 



Discoscaphites, M-t-k. 



a. slu-ll \\ it h m-in-r:il outline subcircular or slightly oval, and 



m-iH-r.-illy inncli conipi't-sscd ; inner volnlions funning ' l:n--r 

 |>:ii t of t he nil ire luilk. anil >o <lci-|)ly iMnln'Mcinj; :is to le:i vc only 

 :i ^m.-ill iunl)ilicus ; body ]>orlion so short :i> scnrcrly l> lit-comc 

 iViM- :it the :i|HTturc. !l:it tcncil on the periphery; surtju-e oi'ii.-i- 

 inentel with cost;e. ami provi<le<l on each >ile with IVoin altout 

 t'oiir 10 nine rows of t iil)ereles. the outer of which are l:n 

 and arranged alonij, each niarii'in of the periphery. Sr \ i-n i i i;> 

 CONRADI. Morion. 



//. Shell dill'erino- from the las! cliielly in having the volutions 

 ^o narrow and little enil>raciiiLi as to leave a large, shallow nm- 

 lulicus. and the body-vohiiion deviating:- very little from the 

 re^-nhir curve of the others. S. (AMMONITES) ('IIKYKNNKN-I.-. 

 ( )wen. 



(Jn.us GONIATITES, Dellaan. 



Shell s)iral. discoidal : sutures ot' sejjta lohed ; siphuncle 

 dorsal. 



Aliont -J(M species. I'pper Silurian to Ti'iassie. /-Jt< ><>/,<. 



(J. HKNSLOWI. So\vl. PI. luo. lio-. r>l-2. ( 1 arl>. limestone. I.*lr 

 \I(in. 



<;.-IIHS CERATITES, Ii-llaiin. 



Shell spiral, discoidal: sli^litly involnte<| whorls, generally 

 strongly s,-iilpt ni'ed ; siitnrc^ crennlately lolted. toothed at l>a>e. 



Twenty-nine ^pecies. Devonian Chalk. A'>/>-/<r. Imliu. 

 C. NODO8U8, Bniir. I'l. 100. fin-. ;,li;. M nx-helkalk. Wvrlcin- 



berg. 



IMMIIIS BUCHICERAS, Hyatt. 



Founded on the crelaceoii'- -pccic- of 6'''/v///7rx. which ditt'ei' 

 iVom the triassic t'ornis in the chai'acteri-i !<- of the -mural out- 

 lino: they are not (,V/v///7's at all. luit . -t rict 1\ ^peakinu-. .!///- 

 montiev. The\ -how this in tin- form of the abdominal cell in 



