PLATE XXVI. 



Aulacophyllum sulcatum, D' Orbigny. 



Fig. 1. Posterior view of a decorticated specimen. 



Fig. 2. Lateral view of the same. 



Fig. 3. Posterior view of a similar specimen, showing some variation in the 



disposition of the lamellae. 

 Fig. 4. Posterior view of a worn specimen showing the calyx. 



Aulacophyllum cruciforme. 

 Page 428. 

 Fig. 5. Posterior view, showing the calyx. 

 Fig. 6. Lateral view of the coral. 



Aulacophyllum trisulcatum. 

 Page 429. 

 Fig. 7. Lateral view of the specimen. 

 Fig. 8. View of the calyx. 



Aulacophyllum convergens. 

 Page 426. 

 Fig. 9. Lateral view of the coral. 

 Fig. 10. View of the calyx. 



