PLATE IX 



Fig. I. Scalpellum fissiiin n. sp., with bowed carina, magnified 5,6 diameters. 



Fig. 2. Sc. fissiim n. sp., with straight carina, magnified 7,8 diametres. 



Fig. 3. Sc. caudidmn n. sp., magnified 1 1 diameters. 



Fig. 3«. Sc. candidum n. sp. View of rostrum, sketch. 



Fig. 4. .SV. virgatunt n. sp., magnified 5,6 diameters. 



Fig. 5 — 8'. Alcpas lithotryae n. sp. 



Fig. 5. Animal, lateral view; magnified 8,5 diameters. 



Fig. 6. Mandible; magnified 80 diameters. 



Fig. 7. Maxilla; magnified 180 diameters. 



Fig. 8. Cirrus of 6* pair, caudal appendage, penis; magnified 52,5 diameters. 



Fig. 8'. One of the rings of the penis; magnified 254 diameters. 



Fig. 9. Lithotrya nicobarica Reinhardt, magnified 1,5 diameters. 



Fig. 10 — 12. Lithotrya conica n. sp. 



Fig. 10. Animal, lateral view; magnified 1,5 diameters. 



Fig. n. Valves, magnified 5,5 diameters. A. Scutum; B. Tergum; C. Carina. 

 Fig. 12. The scales of the peduncle immediately beneath the capitulum ; 

 magnified 36 diameters. 



Fig. 13, 13^ and 14. Lithotrya pacifica Borradaile. 



Fig. 13. Animal, lateral view; magnified 5 diametres. 

 Fig. 1 3rt. Rostrum; magnified 4,6 diameters. 



Fig. 14. The scales of the peduncle immediately beneath the capitulum; 

 magnified ■iiC:) diameters. 



