CLASSIFICATION OF THE BRACHIOPODA. 93 



Mr. Woodward, the German author's typical specimens now belonging to the British 

 Museum, I communicated on the subject with my Viennese friend, M. Suess, who had 

 likewise examined a number of examples under more favorable circumstances, and I was 

 informed by him that the arms were really supported by free calcareous spiral lamellae, 

 which he had succeeded in taking out in single bits, and kindly forwarded the interesting 

 sketches reproduced in my plate, also requesting me to adopt his generic appellation, 

 Koninckina ; so compressed are the valves that scarcely any room existed for the animal, 

 and slight impressions of the arms seem to have been reproduced by the mantle on the 

 larger or ventral valve ; traces of the vascular impressions have also been discovered by 

 M. Suess, but there still remains a few internal points to be made out relative to the 

 hinge line and muscular system. 



Geol. range. — Hitherto only known in the triassic beds of St. Cassian. 



Examples : The only species is the K. Leonhardi, Wissman, sp. 



Family— RHYNCHONELLIDtE. 



Animal free, or attached by a muscular pedicle issuing from an aperture situated 

 under the extremity of the beak, in the larger or ventral valve ; oral appendages spirally 

 rolled, flexible, and supported only at their origin by a pair of short-curved shelly pro- 

 cesses ; structure fibrous, and impunctate. 



Ohs. This family is composed of the three genera, Rh^nchonella, Camarophoria, and 

 Pentamerus. It was represented from the first epoch of animal life, and has continued to 

 exist through the whole geological scale : two species are still found alive in our seas. 



Genus — Rhynchonella, Fischer, 1809.^ 



Type— R. loxia, Fischer. Int., PI. VII, figs. 99—107. 



Anomia (part), Columna, 1616, Linnceus, and some other Authors. 



Trigonella, Fischer, 1809. 



Rhynchonella, Fischer, 1809, (part), oi D'Orbigny and the generality of modern Authors. 



Terebkatula (part), Beshayes, and of many Naturalists. 



Terebratulites (part), of Schlotheim. 



Cyclothyris (C latissima), M'Coy. 



Atrypa (part), of Dalman, &c. 



Hypothyris, Phillips, 1841, Morris, King, &c. 



Hemithyris (part), If Orhigny and M'Coy. 



ACANTHOTHYRIS (part), B'Orbigny. 



Animal free, or attached to submarine objects by means of a pedicle ; visceral mass 

 confined to a small space near the umbones, and separated from the general cavity of 

 the shell by a strong aponeurotic membrane. The mouth is situated in the centre of this 

 membrane, supported by the apophysary processes of the dorsal valve ; the upper lip is 



' Notice des Foss. du Gouv. de Moscow, 1809. 



