PLATE XI 



Fig. 1 -—<<. I 'erruca cassis n. sp. 



Fig. I. Moveable scutum; magnified 16 diameters. 



Fig. 2. Moveable tergum; magnified 16 diameters. 



Fig. 3. Rostrum; magnified 16 diameters. 



Fig. 4. Carina, external view; magnified 16 diameters. 



Fig. 4«. Carina, internal view; magnified 16 diameters. 



Fig. 5. Fixed tergum; magnified 16 diameters. 



Fig. 6. Fixed scutum; magnified 16 diameters. 



Fig. 7 — 13. Verrnca gr ex n. sp. 



Fig. 7. Group of specimens; magnified 3 diameters. 



Specimen, seen from the side of the moveable valves; magnified 7,6 diameters. 

 Specimen, seen from the side of the fixed valves; magnified 7,6 diameters. 

 Moveable scutum; magnified 16 diameters. 

 Moveable tergum; magnified 16 diameters. 

 Fixed scutum; magnified 16 diameters. 

 Fixed tergum; magnified 16 diameters. 



Fig. 14 — 15. Verruca conchula n. sp. 



Fig. 14. Specimen, seen from the side of the moveable valves; magnified 11 diameters. 

 Fig. 15. Specimen, seen from the side of the fixed valves; magnified 11 diameters, in. part of 

 membranous basis; b. part of the outer surface of the object to which the shell was 

 attached ; o. part of the ovary. 



Fig. 16 — 17. Verruca conchula var. minor n. var. 



Fig. 16. Shell, seen from the side of the moveable valves; magnified 10 diameters. 

 Fig. 17. Shell, seen from the side of the fixed valves; magnified 10 diameters. 



