452 



MOLLUSCA 



PHYLUM VI 



Anthracomya Salter ; Asthenodonta Whiteaves. Goal MeaBures. Palaeomutela 

 (Ohligodon) and Palaeanodonta Anializky. Brackisli Perniiaii marls of Europe, 



Anoplophora Sandb., emend. von Koenen (Uniona Poldig) (Fig. 693). Eiglit valve 

 with a blunt tliick cardinal tootli fitting into a .socket in tlie opposite valve. Left 

 valve beside tlie socket has a long posterior lateral tootb. Trias (Lettenkoble). A. 

 donacina Scblotli. ; A. leitica (Quenst.). 



Anoplophora lettica (Quenstedt). 

 Trias ; Friedrichshall (after Al- 

 berti). 



A 



Fig. 692. 



A, Carhonicöla carbonaria (Goldfuss). 

 Permian ; Niederstaufenbach, near Kusel, 

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

 Goal Measures ; Hannibalzeche, near 

 Bochiim, Westphalia (after Ludwig). 



Fig. 694. 



Trigonodus sandhergeri Alberti. 

 Trias (Lettenkohle); Zimmern, 

 Würtemberg. A, Hinge, from a 

 gutta-percha cast taken from a 

 natural mould. 7i, Natural mould. 



Vi- 



Trigonodus Sandb. (Fig. 694). Cardinal tootli strong, triangulär, sometimes 

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

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

 and the Eaibl beds. 



Heminajas Neumayr. Trias. H. (Myophoria) fissidentata Wöhrmann. 



Pachycardia Hauer. 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 teetli 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 {Tlialassites Quenst.) (Fig. 695). Oblong, thick, short anteriorly, 



Fig. 695. 

 Lower Lias ; Ohrsleben, near Halberstadt, Saxony. 



Cardinia hyhrida Sow. 



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

 reported also from the Dogger. 



{TjNyassa Hall. Devonian. (i) Guerangeria {Davousti) (Ehl&ci. Lower Devonian. 



