92 



CUFFEY AND COX 



apertures, Fig. 2g) — are common on deep and shallow 

 oceanward (leeward and windward) and lagoonal reefs. 

 Comparably distributed, except not on windward ocean- 

 ward reefs, are Antropora ouata (many tiny avicularia. 

 Fig. 2h) and Parasmittina alanbanneri (long curved avicu- 

 laria. Fig. 2i). 



Bryozoan roles in reef construction are as important to 

 the paleoecologist as ecozonal distributions (Cuffey, 1977). 

 The Enewetak bryozoans are all cryptic or coelobitic, func- 

 tioning mostly as hidden encrusters under coral fronds, 

 coral-rock ledges, detached rubble, and occasional shells. A 

 few are locally cavity dwellers, but none were observed to 

 be cavity fillers, frame builders, or sediment producers. 

 The Enewetak bryozoans thus are more restricted in con- 

 structional roles than certain cavity-filling and rock-building 

 Bahamian relatives (Storr, 1964; Cuffey, Gebelein, Fonda, 

 Blicfnick, Kosich, and Soroka, 1977; Cuffey and Fonda, 

 1979). 



ACKNOWLEDGMENTS 



Assisting in collecting were M. Zeigler, R. Port, 

 P. Kier, R. Grant, J. Pojeta, E. Kauffman, T. Waller, 

 T. Phelan, A. Childs, R. Mehlen, and C. Dawson, with 

 logistical support from Eniwetok Marine Biological Labora- 

 tory, Pennsylvania State University, National Science Foun- 

 dation, and Atomic Energy Commission. 



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