PLATE 40 A. 



Fig. 1. 539. 1. Thkjutopora tubekchlopa. ( Pag. 149.) 



1 a. A fragment with parts of several lnaiiclies, sli<i\viiig tlir luborculous character very distinctly. 



1 6. A smaller bifiircatiiif; lirancli of the .'^anH' siueics. 



1 C-. -V sni.ill branch soiircdy sliowiiij; the Inliincnlnns character. 



1 d. The .surface niagnilictl, whore the a|icrtiircs are close togellier, ami irregular iu their arrangement. 



1 e. Asurf.ice somewhat worn, where the openings are less closely arranged. 

 1 f. The apertures of several cells, showing minute points or .'^pinnies around the aperture. 



1 g. A transverse .section of a stem enlarged, showing the internal .structure. 



Fig. 2. 540. 2. Trematoi-ora coALKsciiNS. ( P^g- 150.) 



2 o. A fragment showing several branches coalescing. 



2 6. A portion of the surface enlarged, showing the apertures where worn and unworn. The cells are to 



some extent unequally distributed over a part of the coral. 



Fig. 3. 541. 3. Tri-matopora tuhulosa. (r*sg- 151.) 



3 o. .\ fragment of a stem of the natural size. 3 6. A section (f tlie end of the stem. 



3 c, c. Portions of the surface enlarged, showing the form and arrangenient of cells. 



Fig. 4. 54'i. 4. Trkmatopora pitnctata. {^^Q- 151.) 



4 a. A coral of this species enveloping a fragment of a crinoida! stem. 



i b. A portion of the surface enlarged, showing the form and arrangement of the apertures, whieli are some- 

 times close together and in other parts separated. 



4 c. A section of the stem enlarged, showing the structure of the coral. 



Fig. 5. 543. 5. Trkmatopora ostiolata. ( P^?- 152.) 



b a. A specimen showing the coral surrounding the stem of a crinoid, and tlirowing (uit branches in several 

 directiotis. 5 b. A fiagnient «( a bifurcating branch. 



5 c. An enlargement of the surface from the Siime specimen. 



5 (/. A fr;;giuent slightly n<Mlose. anil having the aperinre-. of the cells somewhat irregularly distributed over 



the surface, ami the oval f<u'm rather more elongated than in the preceding figure. 

 5 e. A piu'tion of the surface of the same enlarged. 

 5/, g. Fragments showing the irregular mode of branching. 

 5 h. Xn enlarged portion of fig. 5 g, where the elevated Imrder of the aperture is more perfectly preserved. 



5 i. The emi of a stem enlarged, showing the arrangement of cells and interspaces. 



6 fc. A portion of the last still further magnified, showing the structure of the intercelhilar spaces, and the 



empty or .solid cells without visible septa. 

 5 /. A longitudinal section of a hollow stem enlarged, showing the direction of cells. 

 5 / 1- Magnified from •') / 



5 OT, n. A small l>ifurcating stem, and an enlargement of the same, showing some slight variation in the 



character of the apertures of the cell. 



Fifr. 6. 544. 6. Trematopora solida. (Pag- 153.) 



6 a. A fragment of a solid stem, spreading and slightly flattened above. 

 6 b. A fragment of a bifurcating stem. 



6 c. Enlargements of the surface, showing form and arrangement of the cells. 



Fig. 7, 8. 545. 7. Trkmatopora striata. ( Pag. 153.) 



7 a. The base or attached portion of an individual of this species, having two diverging branches. 



7 b. The same enlarged, showing the form of the apertures of the cells and the strongly striated base. 



7 6 t. A portion still farther magnified from ' a, b. 7 c. A small fragment of the same species. 



8 o, 6. The fragment natural size and enlarged. 8 b \ . A portion still farther magnified from 8 a. 



Fig. 9. . 546. 8. Trematopora granitlifera. ( P^g- 154.) 



9 a. A bifurcating branch of tliis species, where the surface is beautifully granulat«l. 

 b. An enlarg.Hl portion of the same specimen. 



9 c, il. \ small cylindrical stem, and an enlargement, showing the fibrous structure in a longitudinal direction. 



9 c. A stem having several branches. 



Fig. 10. 547. 9. Trkmatopora aspkra. (Pag- 154.) 



10 a. A fragment of a stem of flie natural size. 



10 b. A [>ortion inagiiific<l, .showing the spiuulose surface and crenulated ni-irgins of the apertures. 



10 c. Two small fragments showing a peculiar mode of branching. 



Fig. 11. 548. 10. Trematopora spinulosa. (Pag- 15.5.) 



11 a. Fragment of a small cylindrical stem without branches. 11 b. A bifurcating branch. 



11 c. An enlargement of the surface, .showing the spinules. 



Fig. 12. 549. 11. Trematopora sparsa. ( P^g- 155) 



12 a. A bit'nrcating branch of this coral, scarcely worn. 



12 6. A .simple slender branch of the same species, having the surface worn. 



12 c, d. Enlarg 'ments from the surfaces of the same. 



13 a. Undescribed species of Trematopora. 13 b. Snrfiico enlarged. 

 14. Termination of a branch of Callopora elegans, from fig. 1 c, Plate 40 



