PLATE 26. 



Fig. I. 111. 1. EscHARopoKA RBCTA. (fag. 73.) 



I a. S|>erimrii natural size ; (lie lower vxtreiuity cxpaiidiiif; to luriii tlit- ruullikc |>rui'esi>c-!i, and tcriiiiiiatiii){ 



abru|ttl\ ;ib»t\e. 

 1 *. .\n enlir){c<l (lortion, showing tlie arraiigt-ment of celb, wliich are apparently in ascending spiral lines 



around the axis. 

 1 c. .K small 8|K-cimcn, entirely cylindrical, tapering above to an acute point. 

 1 rf. .\n enlarged portion, showing the oblique elevated lines crossing the surface, in the spaces between which 



are the openings of the cellules. Those lines are partially obliterated in worn specimens. 

 I t. The root or attacliing part of tliis coral : the branches embrace a portion of stony matter. Upon the base 



of the broken shall of the coral, a portion of the surface is marked as the specimen I a. 

 I 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 cither side. 



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



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



3 a. A small fragment of limestone, with several branches of the coral upon its surface. 

 3 6. An enlarged portion of one of the branches. 



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



Fig. 4. 114. 6. Stictopora elegantula. Fig. 76.) 



-1 a. A small fragment of the natural size, showing the form of branches and arrangement of cells. 



4 6. 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. 

 1 rf. 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 the central striated axis. 



4 g. A small portion of the last enlarged. 



Fig. 5. 115. 2. GoRGONiA? PEHANTiQUA. (Pag. 76.) 



.I o. The specimen, natural size. 



5 A. 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. AuLOPOBA ARACHNOIDEA. (Pag- 76.) 



fi a. The dorsal valve of DelthyrU lynx, having the inner side of the shell spread over with a fine web of this 



little coral. 

 G b. A magnified portion, showiii:^ the form of the cells, openings, etc. 

 fi c. Two of the cells still farther magnifie<l. 



Fig. 7. 117. 1. Alecto INFLATA, ( Pag. 77.) 



7 a. Dorsal valve of Lepttena alternata, on the outer surface of which this coral is affixed. 



7 b. Two of the tulies magnified, to show their form. 



Fig. 8. 118. 1. Intricaeia? 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). 

 8 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. 

 t) e, A small portion of a branch still more enlarged, showing the apertures of the cells. 



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



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



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



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



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



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



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



1 1 a. A group of these fossils ; all the stipes, except one, having been broken o(i' by a fracture of the stone. 

 11 (. An enlarged portion, showing the edges of the sheathing scales. 



