452 



MOLLUSCA 



PHYLUM VI 



Anthracomya Salter ; Asthenodonta Wliiteaves. Coal Measures. Palaeomutela 

 (Obligodon) and Palaeanodonta Anializky. Brackisli Permian marls of Eurojie. 



Anoplophora Sandb., emend, von Koenen (JJniona Pohlig) (Fig. 693). Eiglit valve 

 witli a blunt thick cardinal tootli fitting into a socket in the opposite valve. Left 

 valve beside the socket has a long posterior lateral tooth. Trias (Lettenkohle). A. 

 donacina Schloth. ; A. leltica (Quenst.). 



1 -»>-sCT*'^ r™ -' ' -""•' 





Fio. 693. 



Anoplo'phora lettica (Quenstedt). 



Trias ; Friedrichshall (after Al- 



berti). 



A 



Fio. 692. 



A, Carhonicola carhonaria (Goldfuss). 

 Permian ; Niederstaiifenbach, near Kusel, 

 Rhenish Bavaria. B, C. Vittncrl (Ludw.). 

 Coal Measures ; Ilannibalzeche, near 

 Bochum, Westphalia (after Ludwig). 



Fi<;. Gy-t. 



Trigonodus sandbergeri Albert! . 

 Trias (Lettenkohle) ; Zinimern, 

 Wiirtemberg. ^4, Hinge, from a 

 gutta-percha cast taken from a 

 natural mould. B, Natural mould. 

 V:. 



■Trigonodus Sandb. (Fig. 694). Cardinal tooth strong, triangular, .sometimes 

 divided, short, oblique, anterior ; two elongate laterals in the left valve, and one 

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

 and the Eaibl beds. 



Heminajas Neumayr. Trias. H. {Myo])horia) fissidentata Wohrmann. 



Pachycardia Haner. Oblong or trigonal, concentrically striate or smooth ; beaks 

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

 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. 



Gardinia Agassiz {TJialassites Quenst.) (Fig. 695). 01>long, thick, short anteriorly, 



Fig. 695. 

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



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

 reported also from the Dogger. 



(?) Nyassa Hall. Devonian. (?) Guerangeria (Davousti) ffihlert. Lower Devonian. 



