PLATE X. 
; PAGE 
Fig. 1. LINGULA NORWOODI, James. Enlarged about two diameters, : . 2385 
Fig. 2. MONTICULIPORA DYCHEI, James. Naturalsize, . . . . . 285 
2a and 2b. Transverse sections of upper and lower ends. Natural size. 
2c. Part ofa tangential section. Magnified 16 diameters. 
2d. Transverse section (longitudinal of the tubes) of a part of a small speci- 
men. Magnified 18 diameters. 
2e. Part of a longitudinal section of a lateral projection. Magnified 18 
diameters. 
