PLATE -26. 



Fig. 1. 111. 1. ESCHAROPORA RECTA. (Pag- 73.) 



1 a. Sjicciiiien iialural size ; the lower extremity expanding to lunu tlie mutlilve piutesses, and terminating 



abrn|)tl\ abn\e. 

 1 li. An enlarged portion, showing the arrangement of cells, which arc api)arently in ascending spiral lines 



around llie axis. 

 1 c. A small specimen, entirely cylindrical, tapering above to an acute point. 

 1 (/. An enlarged portion, showing the oblique elevated lines crossing the surface, in the spaces between which 



are the openings oi' tlie cellules. These lines are partially obliterated in worn specimens. 

 1 c. The root or attaching part of this coral : the branches embrace a portion of stuny matter. Upon the base 



of the broken shaft of the coral, a portion of the surface is marked as the specimen 1 a. 

 1 g. A longitudinal section of one of these corals, a little on one side of the centre, showing a few ranges of 



the apertures of the cells, and the diverging and ascending tubes on either side. 



Fig. 2. 112. 2. EscHAROPORA RECTA, var. NODOSA. (Pag. 73.) 



Fig. 3. 113. 5. Stictopora? acuta. (Pag. 74.) 



J (I. A small fragment of limestone, with several branches of the coral upon its surface, 

 o b. An enlarged portion of one of the branches. 



3 c. Transverse section of two branches of the coral, just above the bifurcation. 



Fig. 4. 114. 6. Stictopora elegantula. Fig. 75.) 



4 fl. A small fragment of the natural size, showing the form of branches and arrangement of cells. 



4 i. A small part of the same enlarged. The form of the cells is more rounded than appears in this figure. 

 4 c. The entire specimen 4 a enlarged, to show more distinctly the arrangement of the cells, the striated 



margin, etc. 

 4 d. A small specimen, bifurcating above, with the celluliferous crust nearly removed, a few of the cells only 



remaining near the base. The longitudinal and concentrically transverse striae are clearly shown. 

 4 e. A small portion of the same enlarged. 

 4 ./'. A more elongated specimen ; the branches narrow, and bifurcating more nearly like the last species. The 



celluliferous crust is removed, leaving tl^.e central striated axis. 



4 g. A small portion of the last enlarged. 



Fig. 5. 115. 2. Gorgonia? peeantiqua. (Pag. 76.) 



') a. The specimen, natural size. 



5 4. A portion of a branch enlarged, showing the openings upon the two sides of the axis. 



,% This species proves, on farther examination, not to be a Gorgonia. 



Fig. 6. 116. 1. AuLopoRA arachnoidea. (Pag- 76.) 



li a. The dorsal valve ui DeUhyris iyii.r, having the inner side of the shell spread over witli a fine web of this 



little coral. 

 4. A magnified portion, sliowing the form of the cells, openings, etc. 

 (i c. Two of the cells still farther magnified. 



Fig. 7. 117. 1. Alecto inflata. ( Pag. 77.) 



7 a. Dorsal valve of Lfpttena alternata^ on tiie outer surface of which this coral is affixed. 



7 b. Two of tlie tubes magnified, to show their form. 



Fig. 8. 118. 1. Intricaria? reticulata. (Pag. 77.) 



8 a. A small fragment of the rock covered by this coral, and fragments of one or two other species (nat. size). 

 S 4. A portion magnified, showing the apertures of the cells, and the mode of branching and anastomosing. A 



small fragment of another coral lies across the specimen. 

 8 c. A small portion of a branch still more enlarged, showing the apertures of the cells. 



Fig. 9. 119. 3. Retepora? foliacea. (Pag. 88.) 



'.I a. The specimen (nat. size), upon the surface of limestone. 'J 4. Surface of the same enlarged. 



Fig. 10. 120. 1. Stellipora antheloidea. (Pag- 79.) 



II) a. Fragment, exhibiting the prominent star-form cells of the natural size. 



10 4. Three of these stars enlarged, showing points or pores upon their upper surface. One of these stars has a 



slightly irregular form in the centre, as if composed of parts (jf two : this is true of several others. 



Fig. 11. 121. 1. Graptolithus amplexicaule. (Pag- 79.) 



11 a. A group of these fossils ; all the stipes, except one, having been broken off by a fracture of the stone. 

 116. An enlarged portion, showing the edges of the sheathing scales. 



