340 BULLETIN 93, UNITED STATES NATIONAL MUSEUM. 



PLATE 6. 



FIGS. 1-lb. Verruca xanthia Pilsbry. Carinorostral, basal, and top views of 



the type. Page 36. 



2. Verruca xanthia insculpta. Top view of the type. Page 37. 



3, 3er, 3&. Verruca entobapia Pilsbry. Basal, rostrocarinal, and top views of 



the type. Page 38. 



PLATE 7. 



FIGS. 1-1&. Verruca bicornuta Pilsbry. Rostrocarinal, tergoscutal, and rostral 



views of the type . Page 43. 



lo. Verruca bicornuta. Interior of scutum and tergum. 



2-2&. Verruca rathbitniana Pilsbry. Carinorostral, scutotergal, and 



rostral views of the type. C. carina ; F. Sc., fixed scutum ; F. T., 



fixed tergum ; M. Sc., movable scutum ; M. T., movable tergum ; 



R., rostrum. Page 41. 



PLATE 8. 



FIGS. 1, la-. Verruca halotheca Pilsbry. Top and Carinorostral views of the 



type, on a volcanic pebble. Page 46. 



2. Verruca hrvifjnta Sowerby. Top view of specimen from Talca- 



huano Bay, Chile, growing on Balanus psittacus. Page 25. 



3-3&. Verruca bicornuta Pilsbry. Second, first, and part of the sixth 



cirri. Page 43. 



PLATE 9. 



FIG. 1. Verruca bicornuta Pilsbry. Base of cirrus vi and terminal append- 

 age. Page 44. 



2. Verruca alba. Penis, cirrus vi, and terminal appendage of indi- 



vidual figured on plate 2, figs. 1-3. Page 27. 



3. Verruca cuglypta Pilsbry. Pedicel of cirrus vi and terminal ap- 



pendage. Page 40. 



4. Verruca entobapta Pilsbry. Pedicel of cirrus vi and terminal 



appendage. Page 38. 



PLATE 10. 



FIG. 1. Balanus tintinnabulum tintinnabulum (Linnsens'). Taken from a 

 ship reaching Philadelphia from Hongkong, Java, and India. 

 Lateral view. Page 55. 



la-Id. Opercular valves of same specimen. 



le. Basal edge of wall of another specimen of the same lot. 



2. Balanus tintinnabulum zebra Darwin. Part of the free edge of 



radius. Page 57. 



2a, 2b. Balanus' tintinnabulum zebra Darwin. Apical views of two indi- 

 viduals from the ship mentioned above. 



3. B. t. zebra. Zamboanga, Mindanao. Cat. No. 43489, U.S.N.M. 



Figs. 1, 2a, 21), 3, 3, natural size ; the others enlarged. 



PLATE 11. 



FIGS. 1-le. Balanus tintinnabulum occator Darwin. Taken from bottom of 



iron ship reaching Philadelphia from Java. Nos. 469 and 585, 



A.N.S.P. Page 59. 



2-2e. Balanus tintinnabulum volcano Pilsbry. Japan. Lateral view, 



scuta and terga of the type. Cat. No. 43488, U.S.N.M. 

 Figs. 1, le, 2d t natural size ; the others enlarged. Page 60, 



