LIST OF ILLITSTEATIO:^S. 



TEXT FUU'KES. 



i'age. 



Fig. 1. Lateral views of (^-1) Mitella, [B) I'Scalpcllum, and (C) Lepas 3 



2. Scalpellum eos. a, rostral; b, lateral; r, carinal views of the type- 



specimen 10 



3. Scalpellum superhum. «, ventral; ?;, lateral; and c, dorsal views of the 



type specimen 11 



4. Scalpellum gibbum. a, lateral view; b, detail of rostrum 17 



5. Scalpellum osseum. a, lateral view; b, detail of rostrum 20 



6. Scalpellum pressum. a, ventral view; b, lateral view 23 



7. Scalpellum gorgoniophilwm. a, lateral view; 6, detail of rostrum 34 



8. Scalpellum portoricanum. a, rostral and c, carinal details; b, lateral 



view; »S'. portoricanum inlonsum. d, detail of rostrum; e, lateral 



view 35 



9. Scalpellum longicarinatum. a, lateral view; b, carinal view; c, rostral 



view 37 



10. Scalpellum sanctipeirense. a, lateral view; b, c, rostral views of two 



cotj'pes 39 



11. Scalpellum rathbunn'. a, rostral; b, carinal; and c, lateral views of 



type; d, inframedian latus of another individual 41 



12. Scalpellum soror. o, lateral view; /^, carinal view; c, rostral view 43 



13. Scalpellum arietinum. a, lateral view; b, dorsal view 44 



14. Scalpellum diceratum. o, lateral view; 6, carinal view 46 



15. Scalpellum idioplax. a, lateral view; b, rostral view; c, dorsal view.. 49 



16. Scalpelluyn sbmatum. (i, lateral view; b, rostral detail of t3'pe; c, a 



young topotype 50 



17. Scalpellum graciUus. o, lateral view; 6, rostral view; c, carinal view. 52 



18. Scalpellum C'l.rincUum. a, lateral and b, carinal views 53 



19. Scalpellum atbatrossianurn. Lateral view 54 



20. Scalpellum pentacrinarum, with 6, dorsal and c, ventral details 56 



21. Scalpellum micrum, with detail view of rostrum 57 



22. Scalpellum formosum. n, lateral view; b, detail of rostrum; c, carinal 



view 59 



23. Scalpellum gracile, with b, detail of rostrum, and c, carina 60 



24. Scalpellum antillarum, with details of b, rostrum, and c, carina 62 



25. Scalpellum semisculptum, with details of b rostrum, and c carina 63 



26. Scalpellum aurivillii. a, J), lateral views; c, S. aurivilliiincertum, lateral 



view 65 



27. Scalpellum galapaganum. a, lateral view, with details of b, rostrum, and 



c, carina 68 



28.' Scalpellum diclwloplax. a lateral, and b carinal views of the type; r, 



young individual ; d, S. dicheloplax benthophila 71 



IX 



