PLATE 25. 
Fig. 1. 105. 3. Streptelasma corniculum. (Pag. 09.) 
1 a. A small nearly perfect individual. 1 b. A larger specimen. 
1 c. A short and less curved specimen, with the surface distinctly marked. 
1 <1. A portion of the surface of the last enlarged. 
Fig. 2. 106. 4. Streptelasma crassa. (Pag* 70.) 
2 a. Lateral view of a specimen, the edges somewhat broken. 
2 b. Longitudinal section, showing the internal arrangement of the lamellae. 
2 c. View of the cup, showing imperfectly the meeting of the lamellae in the centre. 
Fig. 3. 107. 5. Streptelasma multilamellosa. (Pag. 70.) 
3 a. Lateral view of a specimen, somewhat shortened from wearing off of the smaller extremity. 
3 b. Transverse section, showing the thin lamelhe. 
3 c. An enlarged portion of the denuded outer surface. 
Fig. 4. 108. 6. Streptelasma parvula. (Pag- 71.) 
4 a. The lower part of a specimen of ordinary size, with the margin of the cup broken ofF, showing the lamellae 
within. 
4 b. Transverse section of the same, showing the simple radiating lamella-. 
4 c. A group of the same. Three of the specimens lie upon the surface of the stone, with their bases nearly in 
contact. 
Fig. 5. 109. 1 . Porites? vetusta. (Pag- 71.) 
5 a. Surface of the specimen, a part only showing the cells. 
5 b. A portion magnified. The figure on the right hand is one of the cells more distinctly enlarged. 
Fig. 6. 110. 1 . - cyathiformis {Genus undetermined). (Pag. 72.) 
6 a. View of specimen, looking upon the upper or inner surface. 6 b. Lateral view. 
6 c. Enlarged portion of the inner surface, showing the structure and arrangement of the cells. 
