Anatomy and Classification of the Order Lyomeri. 317 



EXPLANATION OF THE PLATES. 

 Plate VllI, 



Fig, L Stromatopora concent rica, Goldfuss, from Devonian of Gerolstein. 



Wall of a chamber, showiDg tubiili. X 325. 

 Fiff. 2. Larger tubiili from an older wall. X 550. 

 Fiff. 3. Hoops and coils in chambers and canals of S. concentrica. 



3 a. Ditto from Actinostroma clathratum, Nich. Both 



X 1800. 

 Fill. 4. Ditto from sarcode of rolytrema cylindricum, Carter. X 1300. 

 Fig. 5. Part of wall of chamber of Eozooti canadense, Dfiwson, from 



Lower Laureutian limestones, Burgess, Canada, showing 



mural pores and tubnli. X 140. 

 Fig. 6. The same, X 550. 



Fig. 7. Old branching canals in Eozoon. X 1300. 

 Fig. 8. Branching system of canals in Fozoon. X 35. 8 a. The same 



showing hoops. X 325. 

 Fig. 9. Hoops and coils in chambers and canals of Eozoon. X 1300. 

 Fig. 10. The same from another specimen. X 1300. 



Plate LX. 



Fig. 11. Canals in Eozoon. X 140. 



Fig. 12. Eozoo7i. Young chambers forming just below surface of speci- 

 men, a, mural tubuli ; b, diiaphragm across opening in 

 chamber. X 140. 



Fig. 12 a. Series of young chambers. X 50. 



Fig. 12 b*. Minute Foraminiferan found in one of the chambers of 

 Eozoon. X 190. 



Fig. 13. Vertical longitudinal section of Polgfrema cylindricum, Carter. 

 X 12. 



Fig. 14. Wall of chamber of same, showing branching tubuli. X 100. 



Fig. 15. Cannopora tube in Stromatopora bilcheliensis, Bargaizky, Devo- 

 nian, showing Spiouiform worm inside, a, acicula. X 35. 



Fig, 16. Another Cannopora tube from same section, showing surface 

 annulations of annelid inside. X 17. 



XLVI. — The Anatomy and Classification of the Teleostean 

 Fishes of the Order Lyomeri. By C. Tate Regan^ M.A. 



(Published by permission of the Trustees of the British Museum.) 



Order LYOMERI. 



Scalfrless soft-rayed fislies witli a long slender tail, dorsal 

 and anal fins long, no caudal, pectorals (when present) small 

 and pelvics absent. Gill-openings small, separate. Mouth 



* The discovery of the beautiful little coiled shell (fig. 12 b) in one of 

 the chambers o{ Eozoon canadense settles the '■^Eozoon controversy" 

 beyond the possibility of further dispute. I do not tliiuk that the shell is 

 a young stage of Eozoon, but rather that it has been ingested as food from 

 without. 



24* 



