37 



Lincaria, Hb. 64 



Valvula rounded; costa emarginate; sacculus free, base 

 weak, extending in a rounded, projecting, papilla, set 

 with a few long spines at its junction with a heavily spined, 

 curled, plate. Uncus weak, edge spined. jEdrcagus long, 

 pistillate. Saccus incurved. 



Ostium weak. Signum a deep ridge. 



Cosytnbia annulata, Schulz. 3 2 



Valvula rounded, base spined; costa incurved; sacculus 

 base weak, extending in a projecting papilla, set with 

 stout, straight, spines at its junction with a long curved 

 arm. Uncus weak, edge spined above, ^doeagus short, 

 pistillate. Saccus incurved. 



Ostium weak. Signum a deep ridge. 



Pendularia, Clerck. 3 2 



Valvula rounded, base spined; costa almost straight; 

 sacculus base weak, extending in a projecting papilla, set 

 with many fine spines at its junction with a long curved 

 arm. Uncus weak, edge spined to the base. /Edoeagus 

 pistillate. 



Ostium weak. Signum a deep ridge. 



Orbicularia, Hb. 43 



Valvula rounded; costa almost straight; sacculus base 

 weak, extending in a projecting papilla, set with a few 

 stout spines at its junction with a curved arm. Uncus 

 weak, edge spined nearly to base. JEdceagus pistillate. 

 Saccus incurved. 



Ostium weak. Signum a deep ridge. 



C. puppillaria the type of this genus may be dis- 

 tinguished by the junction of the sacculus with the curved 

 arm being set with short, stout, spines. 



Lythia purpuraria, L. 3_3 



A difficult structure to read. Its position very doubtful. 

 Valvula reduced to a small lobe projecting from the 



