178 



NEW YORK STATE MUSEUM 



PLATE 4 



Continuation of the illustration of Pleurodictyuni and Hicetes, 

 etc. 

 I, 2 Sections of P. styloporum showing not only the large 

 worm but the smaller ones in the thickened base of the coral 



3 An etching of P. styloporum showing actual attach- 



ment of the worm tube Hicetes to the surface of the gas- 

 tropod Loxonema 



4 The tube Hicetes penetrating one polyp cell and passing thence 



into another 



5 The small sponge found in the tube of the large worm Hicetes 



6 Chonetes sarcinulatus Goldfuss, the brachiopod 



to which P. problematicum usually is attached. 

 (After F. Roemer) 



7 The greatly enlarged interior surface of the worm tube 



Hicetes with slender serpulid worm tubes attached 



8 The enlarged surface of part of a Loxonema, covered with 



small serpulids. This specimen of Loxonema had served 

 as base of attachment for P. styloporum. 



9 Loxonema ham. iltoniae Hall 



iii: 



