Plate 3 



Figures 1 a-c. Dif<corbis haccata (Heron- Allen and Earland). X 90. Off 

 British Isles, a, dorsal view; h, ventral view; c, peripheral 

 view. 

 2 a-c. D7scorb2S beriheloii (d'Orbigny). (After d'Orbigny.) a, dorsal 

 view; h, ventral view; c, peripheral view. 

 3-5. Discorbis bertheloti (d'Orbigny), var. fioridensis Cushman, new 

 variety. Specimens from off Fowey, Fla. a, a, a, dorsal 

 views; b, b, b, ventral views; c, c, c, peripheral views. Fig. 3, 

 Holotype. X 50. Figs. 4, 5, X 40. 



148 



