Plate 15 



Cellarinella tijegovanae, new species 

 (For explanation of abbreviations see key for plate 12. All figures drawn with aid of camera liicida) 



Figure A: A typical, flattened, slablilce. branched colony. Nodes are left white, inter- 

 nodes are dotted. Dots represent orifices. Chitinous rootlets are near colony base. Scale a.t 



Figure B: Another, smaller colony. Scale a. 



Figure C: Enlargement of part of internode showing 14 orifices, each with pair of suboralj 

 external avicularia. Scale a of plate 12. 



Figure D: Inner surface of frontal wall of a zoid. The obliquely placed internal avicu-ii 

 larium with its hooked, gaping mandible is at upper left in the cavity. Frontal oral ledge; 

 is high and hides the internal avicularium from external \'iew. At midright is stretch ofc 

 porous wall belonging to another zooecium. Scale b of plate 12. 



Figure E: A young, not-too-heavily calcified, ovicelled zoid. Part of upper lip or distah 

 border of orifice is damaged, broken away. Because of light calcification the ovicell chambere 

 is faintly visible beneath frontal pores. Scale b of plate 12. 



Figure F: Inner frontal surface of young, lightl}' calcified zoid. Upper frontal is smooth-!) 

 walled and expanded. The lower frontal is narrower and porous. Two calcareous processese 

 overhang the basal sieve plate. Scale b of plate 12. 



Figure G: Sagittal section of heavily calcified, ovicelled zooecium. Frontal wall is of] 

 variable thickness; compare with figures E and H. Scale b of plate 12. 



Figure H: A stereogram of parts of three zoids, showing differences between the thin,ii 

 smooth, and relatively nonporous back walls, the thin, porous lateral walls, and the thick,ii 

 channeled frontal walls. The few large rosette plates are characteristic of lateral walls,s 

 which also have numerous pores arranged in a few rows near edge next to frontal wall.l 

 Scale b. 



