La March's Cabinet, 



Daudin established this genus, which is remarkable 

 from the cavity receiving the ligament having the ap- 

 pearance of being divided into two, the one at the end 

 of the other; the ligament, though internal, is parti- 

 ally visible outside, from the almost marginal situation 

 of the cavities in which it is placed; one short primary 

 subbifid tooth on each valve. Shell with external ribs 

 or grooves on the exterior of the valves, and tinted 

 with red within. 



Ungulina oblonga Ungulina transversa. 



SOLEMYA. 



Encycl. Meth. plate 225, yfy. 4. 



The genus Soleuimya, as it should properly be called, 

 at first sight appears to resemble the Modiola; never- 

 theless, its characters bear a greater affinity to the So- 

 lenes, and a yet greater to the Anatinae. Shell thin, 

 transversely oblong, cylindrical, or compressed, obtuse 

 at the extremities; apices flat and hardly visible, one 



