EXPLANATION OF PLATES. 



PLATE 1. 



FIG. 1. Verruca coraliophila Pilsbry. Top view of type. C., carina ; F. Sc., 

 fixed scutum; F. T., fixed tergum; Us. rostrum. Page 21. 



la. Verruca coraliophila. Basal view. A. R., adductor ridge. 

 2, 4. Verruca coraliophila. Carinorostral views of two individuals, the 

 movable plates lacking. 



3. Verruca coraliophila. Interior views of fixed tergum and scutum. 

 5. Verruca coraliophila. Interior views of movable tergum and 



scutum. 



PLATE 2. 



FIGS. 1-1 b. Verruca alba Pilsbry. Pom-tales Plateau, near Key West, Florida. 

 Top, carinorostral and basal views. Page 25. 



2. Verruca alba. Basal view of a Blake specimen. 



3, 3a. Verruca alba barbailcnsis Pilsbry. Top and rostrocarinal views of 

 the type. Page 28. 



4. Verruca alba caribbea Pilsbry. Colony on a sea-urchin spine. 



Page 28. 



PLATE 3. 



FIGS. 1-lc. Verruca nexa, Darwin. Top, scutotergal, and carinorostral walls 



and base. Page 29. 



2. Verruca cuglypta Pilsbry. Interior view of rostrum. 



2a. Verruca euglypta Pilsbry. Interior view of fixed and movable 



scuta and terga. Page 39. 



PLATE 4. 



FIGS. 1-lc. Verruca floridana Pilsbry. Top, base, rostrocarinal and scuto- 

 tergal walls. Page 31. 



2. Verruca floridana. Movable plates of a more sculptured indi- 



vidual. 



3. Verruca floridana. Carinorostral view of an individual which sat 



transversely upon an echinoid spine. 



4. Verruca crtlothcca Pilsbry. Basal view of type. Page 33. 

 4c, 4&. Verruca calotheca. Interior of movable scutum and tergura. 



PLATE 5. 



FIGS. 1, la. Verruca calotheca hctcropoma Pilsbry. Top and carinorostral 



walls of the type. Page 35. 



2, 2a. Verruca calotheca flavidnla Pilsbry. Carinal and top views of the 



type. F. T., fixed tergum; If. T., movable tergum. Page 34. 



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