ORDER I 



PRIONODESMACEA 





Anoplophora (Sandb.), Koenen (Uniona, Pohlig), (V\^. Oil. Ki^ht \al\v\vith a 

 Limit thick ranlinal tooth filling into ;i socket in tin- opposite valvt-. Lt-l'l valve 

 hi-siilr the socket has a long posterior lateral tooth. Trias (L-tt-nkohl.- . A. donacina^ 

 Sdi loth.; A. lettica, Qum-t. 



Tn'uonodus, Saudi). (Fig. 645). Cardinal tooth strong, triangular, sometime- 

 divided, short, oblique, anterior; two elongate lat.-rals in tin- left valvi-, ;md one 



Anoi>t]ili<'i-'i li'tt'n-,1. QIH ! 

 Trias; |-'ri.-rl richsluill (after 

 Albert!). 



FIG. 643. 



A, Anthrncosla carbonaria, Golclf. sp. 

 Permian ; Xiederstaufenbach, near Kusel, 

 Rhenish Bavaria. B, A. Lott.nen, Ludw. 

 sp. Coal Measures ; Hannibalzeche, near 

 Bochuni, Westphalia (after Lndwig). 



FiO. 645. 



* Sinitllii rih i-i. Albert!. 

 Trias (Lettenkohle) ; Xiiiiincrn, 

 Wurtemberg. A, Hinge, from a 

 reverse impression of cast. /-', 

 Natural cast. Vi- 



lateral in the right valve. Trias; especially common in the Lettenkohle dolomite 

 and the Raibl beds. 



Heminajas, Neumayr. Trias. H. (Myophoria) fissidentatu, Wolirmann. 



Pachycardia, Hauer. Oblong or trigonal, concentrically striate or smooth; beak> 

 nearly terminal, curved, adjacent, with a lunule ; anterior end inflated, blunt ; 



FIG. 

 Cardinia hybrida, Sow. Lower Lias ; Ohrsleben, near Halberstadt, Saxony. 



posterior compressed ; two strong divergent cardinal teeth in each valve, the anterior 

 on the right being weaker and nearly marginal ; each valve has also a long posterior 

 lateral tooth. Alpine Trias. 



Cardinia, Agassiz (Thalassites, Quenst.), (Fig. 646). Oblong, thick, short anteriorly, 

 rounded. Cardinal teeth weak or obsolete, posterior lateral strong. Lower Lias, and 

 reported also from the Dogger. 



? Nyassa, Hall. Devonian. ? Guerangeria (Davousti), Oehlert. Lower Devonian. 



