100 G. 0. Sårs. 



Graptoleberis testudiuaria, Fischer, 

 var. occidentalis. 



Fig 8. Adult ovigerous female, viewed from left side; magnified 

 145 diameters. 

 » 8a. Caudal part, magnified 220 diameters. 



» 8b. Posterior part of left valve, exhibiting the 2 dentiform pro 

 jections of the infero-posteal corner. 



PI. XI. 



Cliydorus Barroisi (Richard). 



Fig. 1. Ephippial female, viewed from left side; magnified 200 dia- 

 meters. 



» la. Caudal part, magnified 300 diameters. 



» lb. Posterior part of left valve, exhibiting the dentiform pro- 

 jection of the infero-posteal corner. 



Cliydorus Poppei, Richard. 



Fig. 2. Adult ovigerous female, viewed from left side; magnified 



200 diameters. 

 » 2a. Caudal part, magnified 300 diameters. 

 » 2b. Labrum viewed from left side. 

 » 2c. Posterior part of left valve, exhibiting the quite unarmed 



infero-posteal corner. 



Cliydorus eurynotus, G. O. Sars. 



Fig. 3. Adult ovigerous female, viewed from left side; magnified 

 155 diameters. 

 » 3a. Caudal part, magnified 245 diameters. 



» 3b. Adult male, viewed from left side ; magnified 155 diameters. 

 » 3c. Same, caudal part, magnified 245 diameters. 



Cliydorus pubesceus, G. O. Sars. 

 Fig. 4. Adult ovigerous female, viewed from left side; magnified 

 155 diameters. 

 » 4a. Caudal part, magnified 245 diameters. 



» 4b. Adult male, viewed from left side; magnified 155 diameters. 

 » 4c. Same, caudal part; magnified 245 diameters. 



Dadaya macrops (Daday). 

 Fig. 5. Adult ovigerous female, viewed from left side; magnified 

 200 diameters, 



