the Genus Fistulipora, M-Goy. 



513 



by a few remote tabulge, while the mesopores exhibit the cha- 

 racteristic vesicular tabulation of the genus, especially near 

 the base of the colony. As growth proceeds this tabulation 

 assumes a more regular appearance, and may consist of two 

 or more rows of cells as it were dovetailed into each other 

 (fig. 5, D). 



Fig. 5. 



FistuUpora eifeliensis, Schliit. sp. A. Coralluin, natural size ; the shading 

 is given merely to show the rotundity of the specimen and the some- 

 what conical base. B. Transverse section, enlarged about twelve 

 times. C. One of the autopores, showing the fold, enlarged about 

 twenty times. D. Longitudinal section, enlarged about twelve 

 times, a, autopores ; ??i, mesopores. 



Ohs. An interesting feature is noticeable in the mesopores 

 of this species. Certain of them, larger than the average 

 and of a subelliptical form, are partially divided by a pro- 

 jection as thick as the cell-walls, which extends from those 

 walls about halfway across the cell-cavity (woodcut, fig. 6). 



Ann. & Mag. N, Hist. Ser. 5, Vol. xvi. 35 



