ORDER I 



I'HIONODKSMACKA 



879 



( sVA /'-.</ a. -i. Kin- !'!<,'. ';:!. Ovate or quadrate, smooth ; lateral teeth not Muted: 



anterior adductor seal 1 with a .-mall radial l>utt iv.-.-. Abundant in the iVrmian. 



Myophoria, Bronn (Neoschizod u *, (Jieb.), (Figs. o'."<^, ;.":?. 



Smooth or radially sculptured, Lr\ , u-ually with a .-tron^ 



i-adial ridp- extending IVoni the ^Rv ^^/ nnilioin-s Lack ward and 



do\vnward to the hasal margin ; ^^f^^ ^ ne ^''"'I't'iiv on th- 



thus M-parat.-d usually di.- 

 ivpant. 



Schizodus obscurus, Sow. Zechstfiu ; 

 rodenbach, near Hanuti. ^4, Cast, 

 Hinge, Vi (after King). 



Alh. s]>. Schauinkalk ; 

 Riidersdorf, near 

 Berlin. 1/1- 



Myophorio 

 Upper Trias; St. Cassian, Tyrol. 

 A, Exterior of right ralve, ' ,. 

 /.', Enlargdl view of hingf. 



lateral teeth fluted, muscular scars buttressed by feeble ridges. Abundant in the Trias. 

 Sub-genus : Myophoriopsis, Wohrmaun. 



Trigonia nm-is, Lam. Lower Brown Ji 

 dershofen, Alsace. 1 /\. 



r///". Park. Middl' 1 CP-: 

 (Hervien); Meulo de Bracquegnies, Belgium. 1/1- 



Trigonia, Brug. (Figs. 65.4-658). Surface sculptured with nodulo>e ril.- m- row.- ot 



FIG. 650. 



Trigonia costato, Sow. 

 Middle Jura; Wurtemberg. 



FIG. 657. 



7V/'/""/", cf. ulifoi-iiiis, Park. Senonian ; 

 Vaels, near Aix-la-Chapelle. i/!. 



FKJ. 658. 



Lam. Recent ; Aus- 



tnilia. Hin-e, Vi- 



pustules, the posterior dorsal area usually discrepant with the rest. Beaks opistho- 



