BULLETIN OF THE GEOLOGICAL SOCIETY OF AMERICA 



Vol. 23, pp. 357-370, PLS. 19-22 JULY 29, 1912 



PROCEEDINGS OF THE PALEONTOLOGICAL SOCIETY 



DEVELOPMENT AND SYSTEMxVPIC POSITION OF TJIE 

 MONTICULIPOEOIDS ' 



BY E. Jl. CUMINGS 



(Presented before the Paleonto logical Society December 29, 1911) 



CONTENTS 



lutroduction 857 



Development of Prasopora 358 



The protoeciuui 358 



The ancestriilii 350 



The primary buds 351) 



The secondary buds 3G0 



Development of Pcronopora 361 



The primary buds 361 



The median lamina 361 



Develo[)ment of Callopora 362 



The protoecium 362 



The ancestrula 362 



The primary buds 363 



Development of PhyUoporina corticosa „ 363 



Development of Rhomhotrypa 364 



Development of other genera 3(>4 



Discussion and conclusions 364 



References 366 



Explanation of plates , 367 



Introduction 



In my paper on the development of Paleozoic Bryozoa (6), published 

 in 1904, I stated that the results brought out in that paper regarding 

 the budding order of the initial growth stages of the bryozoan colony 

 would afford a solution of the systematic position of the Trc]K)stoniata, 



1 Manuscript received by the Secretary of the Geological Society of America Fel)rnary 

 28, 1912. 



XXVI— Bull. Geol. See. A.M., Vol. 23, 1911 (-^57) 



