D.P. GORDON AND P.D. TAYLOR 
Figs 104-108 Ascophoran cheilostomes. 104-106, Lepraliellid sp. 1, IGNS BZ 217; 104, disposition of autozooids, x 32; 105, lingulate adventitious 
avicularia and adjacent zooidal orifices, x 193; 106, zooidal orifices and a concavity probably indicating the position of a former hyperstomial ovicell, x 
154. 107-108, Chataimulosia primaeva sp. nov., IGNS BZ 202, holotype; 107, ovicelled zooids, x 112; 108, peristomial orifice, showing median 
suboral avicularium with crossbar, and position of primary orifice at a deeper level, x 470. 
avicularium in E. crassa is equivocal, however. In species of 
Escharoides, one or a pair of lateral-oral avicularia occurs adjacent 
to the peristome. In the present material the single avicularium could 
have been budded from an areolar septula pore adjacent to the 
peristome or, what appears more likely, from a septular pore in the 
proximal part of the shield of the distal zooid. Escharoides species 
typically have oral spines but there is no trace of oral-spine bases in 
the poorly preserved material at hand. 
