134 EOCENE AND LOWER OLIGOCENE CORAL FAUNAS. 



considerable number of septa of the fonrtli: about lialf of the septa reach 

 the cokiraella. The septal faces granulate. Eudotheca present, though 

 not abundant. Columella large in proportiori to the diameter of the coral- 

 lite ; very vesicular. 



The other specimens considered are from Montgomery, Louisiana. 



The specimen represented in PI. XIV, fig. 4, resembles the one 

 already described in the size and general arrangement of the calices, 

 but the corallites are more ci'owded. The expanded base possesses 

 strong costaj, which are beaded along the summits and are regularly 

 alternately larger and smaller in size. The costpe on the outer surface of 

 the corallite wall are similar in character. The costje are not acute, but 

 are somewhat rounded. This specimen is attached to a shell of Pseudoliva 

 vdusta (Com*ad). 



The features of importance in the next specimen are: One large calice 

 has a longer diameter of 5 mm., and a shorter diameter of 4 ram., but 

 another calice has a diameter of 3 mm. The corallites are crowded. 



Tlie last specimen (PI. XIV, fig. 5) is almost certainly an abnormalitv. 

 The basal expansion spreads over some Serpula tubes and an undetermined 

 piece of coral which in cross section has a decidedly Astrangioid appearance. 

 The corallites of the incrusting colony frequently have the appearance of 

 having budded ofi" from the basal object of support. But a section cut 

 longitudinally through two corallites of the colony, and transversely 

 through the object of fixation, showed no connection at all between the 

 corallites and the latter. Except for tlie irregularities due to the very 

 uneven surface of the mass to which the colony is attached, the surface of 

 the expanded base presents the same characters as those already given. 

 The corallites are usually rather distant, several millimeters apart. The 

 distance between them is freqiiently determined by a Serpula tube, a coral- 

 lite being on each side of it. The diameter of the calices usually varies 

 from 2. ,5 to 4 mm., and they do not stand very high above the basal 

 expansion. One corallite, however, is peculiar; its calice has a diameter 

 of 5.2;") nun., and projects 7 nun. above the basal expansion. This large 

 corallite shows no characters, except abnormal size, that would suggest its 

 being different from the other corallites of the various specimens of the 

 species studied. The character of its costal markings, the costal arrange- 

 ment, the nnnd)er of septa, and the columella in all of the noncoiToded 

 corallites are the same. The basal expansion at the baseof this corallite seems 



