ttviii CONCHY LI A~niTllYR A 



6. pellucidus, subarcuatus, dente altero bipartito. 



slightly curved, with one of the two teeth deeply 

 cloven. 



26. PSAMMOBIA. 



* valvd altera bidetitatd. 



with two teeth in one of the valves. 



1. tseniata, dente altero planato-rotundato. 



one of the two teeth flattened and rounded* 



2. florida, striis minimis longitudinalibus reticulata. 



reticulate by minute longitudinal striae. 



3. costulata, antich costulis obliqnis. 



with oblique ribs on the anterior side. 



4. fragilis, striis transversis lamellatis , 



with transverse laminar stris3e. 



5. Laskeyi, fovea transversa elongatd cardinali. 



with a transverse elongated cavity at the hiiige. 



** valvis bidentatis. 



with two teeth in each valve. 



6. Legumen, linear i-oblovga, dente altero bipartito^ 



linear-oblonsf, with one of the teeth deeply cloven. 



7. diclivis, oblonga, dente altero concavo. 



oblong, with one of the teeth concave. 



8. antiqnata, reuiformis, dentibus conico-erectis. 



kidney-shaped, with the teeth conic and erect. 



