NO. 1101. GENERA OF SIMPLE FUNGID CORALS— VAUGHAN. 399 



Remarks. — Gregory says Metethmos is most closely allied to Pro- 

 fcflniioH^ differing- from that genus by possessing a well-developed pa- 

 pillary, instead of a parietal columella. Microsmllla Koby differs in 

 having a regularly perforate wall. 



The structure of the wall is not given, nor is anything said concei'n- 

 ing the epitheca. Fig. ^Sh (Plate xviii) indicates that below the bottom 

 of the calice the wall is compact; tig. 85 seems to show a few perfora- 

 tions. Epitheca, if not altog'cther absent, is only vestigial. 



lO. Genus PLACOSERIS de Fromentel. 

 1860. Plaruscris de Fromentel, Paleontol. franc., Crctacc, VIII, Pt. 24, p. o29. 



Original generic diagnosis. — "Corallum attached by a wide base, 

 wall cylindrical. Costse granulated and well marked. Septa synap- 

 ticulate, numerous and unequal, columella elongate, composed of a 

 series of trabecular fused together and laterally strongly spinose." 



Type species. — Placoseris patella de Fromentel, Paleontol. frany., 

 Cretace, VIII, p. 330, pi. xlix, fig. 4. 



Distribution. — Cretaceous, Cenomanian, Saint Croix, France. 



Remarks. — M. de Fromentel says nothing about the structure of the 

 wall or septa, nor does he make any statement regarding the epitheca. 

 According to his enlarged figure of the calice (Plate xlix, fig. \}>), the 

 wall appears perforate in places; the septa seem to be interrupted 

 along the upper margins, strongly suggesting pores. Epitheca is not 

 indicated in the upright view of the corallum, fig. 4. However, the 

 type species needs to be carefully restudied. 



SEPTA AS IN LEPTOPHYLLIIDiE; CHARACTER OF WALL UNKNOWN. 



Myriophyllia Volz. 

 Omphalophyllia Laube. 

 Subgenus Craspedophyllia Volz. 



Genus MYRIOPHYLLIA Volz. 

 1896. MuriopliiilUa Volz, Pateontographica, XLIII, {>. 64. 



Original generic diagnosis. — "Corallum simple, with numerous 

 instances of transitions to compound or compact mode of growth. 

 The septa are extremely tine and numerous. They are composed of 

 distinctly differentiated trabecule (Balken), are mostly compact, but 

 pores may be present. Especially characteristic are the long, jagged, 

 macroscopically scarcely visible septal gramdations, with which the 

 septal faces are covered. Columella spongy. Synapticula numerous. 

 Endotheca, and usually also the pseudotheca, well developed. Cen- 

 tral fossa round or elongate, sunken." 



