2 
STOilATOPORA. 
STOMATOPORA, Bronn/ 1825. 
Stnontais. 
Alecto, Lamouroux, 1821. 
Aulopora, pars, Goldfuss, etc. 
Diagnosis. 
Diastoporidae with the zooecia forming flat adnate zoaria, 
composed of uniserial lines. These zooecial lines branch 
dichotomously, and sometimes anastomose into an irregular 
reticulate web. The cell mouth is flush or slightly raised ; 
zooecia tubular or subpyriforin. 
Type Species. 
S dichotoma, Lamouroux, 1821. 
Cretaceous Representatives. 
The Cretaceous members of the genus Stomatopora agree fairly 
well with the typical Jurassic species ; there appears no more 
serious difficulty in restricting the genus to uniserial zoaria than 
in the case of the Jurassic forms. The Cretaceous ‘ species,’ or the 
groups of individuals which pass for ‘ species,’ are, however, more 
irregular than their Jurassic predecessors ; cases are not unfrequent 
in which two zooecia occurring side by side render the zoarium 
locally biserial. Such instances mark an approach to the corre- 
sponding variation in narrow-banded Frohoscina, in which the 
zoarium is locally uniserial. 
The most aberrant of Cretaceous Stomatopora is figured on PI. I. 
Pig. 12 ; it is remarkable for the extreme height of the peristomal 
portions of the zooecia, which are of a height corresponding to 
that seen in recent specimens of Tuhiilipora or Fhalangella. 
1. Stomatopora granulata (M. Edwards), 1838. 
Synonymy. 
Alecto granulata, M. Edwards, 1838. Mem. Cris. : Ann. Sci. nat., Zool., 
ser. 2, vol. ix. p. 205, pi. xvi. figs. 3, 3a. 
,, ,, Michelin, 1845. Icon. Zooph. p. 202, pi. lii. fig. 4. 
,, ,, d’Orbigny, 1850. Prod. Pal. vol. ii. p. 86. 
,, ,, d’Orbigny, 1851. Pry. Cret. pi. 628, figs. 5-8. 
^ Bronn : Syst. Pflanz. p. 27, pi. vii. fig. 3. 
