42 KENTUCKY GEOLOGICAL SURVEY. 



CALLOPORA MULTITABULATA (ULRICH). 



Plate 1, fig. 2. 

 Monotrypella multitabulata. Ulrica, Fourteenth Ann. Kept. Geol. and Nat. 



Hist. Surv. Minnesota, p. 100, 1S8G. 

 Callopora multitabulata. Ulrich, Geol. Minnesota, vol. 3, p. 280, pi. xxiii, 11, 



12, 16, 17, 24-26, 30, 31, 1893. 



Zoarium subcylindrical, branching rather irregularly, from 



2 to 10 mm. in diameter, usually about 7 or 8 mm. Surface with 

 more or less strongly elevated monticules, 2.5 mm. apart from 

 center to center. Alesopores few, scarcely seen at the surface, 

 the angular, thin- walled zocecia being in contact with each 

 other. Apertures direct, about 11 in 3 mm. Diaphragms ex- 

 ceedingly abundant throughout the zooecial tubes, very much 

 crowded in the peripheral region. 



Occurrence: Common in the Lexington group at Frankfort 

 and numerous other localities in Kentucky. The cylindrical, 

 branching form and the rather large, elongated cell apertures 

 serve to distinguish this form from associated bryozoa. 



DEKAYELLA TRENTONENSIS (ULRICH). 



'Plate 1, fisj. 3. 



Dekayella trentonensis. Ulrich, Jour. Cincinnati Soc. Nat. Hist, vol. 6, p. 151, 

 pi. vi, 6, 6a, 18S3. Geol. Minnesota, vol. 3, p. 274, 1893. 



Zoarium dendroid; branches compressed, dividing frequently 

 and rather irregularly, from 4 to 10 mm. in width. Surface 

 smooth, or with low, rounded monticules 2.5 mm. apart; oc- 

 cupied by clusters of cells a little larger than the average, with 

 occasionally a few mesopores at their summits. Apertures 

 subangular, about 9 in 2 mm. ; interspaces rather thick. Acan- 

 thopores large and prominent, when preserved, about 6 or 7 in 



3 mm. Zoopcia with thin, slightly flexuous walls in the axial 

 region and with diaphragms 2 to 4 times their diameter apart ; 

 as they curve gently into the mature region, the walls thicken, 

 and diaphragms become much more numerous. 



Occurrence : In the Lexington group at Frankfort and other 

 localities in central Kentucky, associated with the two preced- 

 ing species. 



