Plate 28 

 Smittina oblongata, new species 



Figure A: A zooecium showing height of upright peristomial collar and depth of its 

 wide notch. Zooeciuni tipped away from the observer so wide inner tooth or lyrula is not 

 visible from this angle. Scale c. 



Figure B: Shallow, spatulate, suboral avicularium. Drawn to scale d. 



Figure C: Four zooecia, one with suboral avicularium in typical position and orientation. 

 Number, size, and distribtuion of frontal pores depend on degree of zoid calcification. 

 Scale b. 



Figure D: Sterogram of two zooecia, seen from the side. Back wall (heavily stippled, 

 to left) is flat and thin; side wall, also thin, has pores, 4 belonging to upper zoid, 5 to lower. 

 Sides of frontal wall are roughened or lined irregularly. Scale a. 



Figure E: Ovicelled zooecium. This figure is incomplete and imperfect because lower 

 part of ovicell, orifice, and peristomial area were obscured by debris, indicated by the cross- 

 hatching over that area. Also, zooecium was at a broken-off edge of the colon}- and ovicell 

 had lost part of Its secondary calcification layer. Scale c. 



Figure F: Primary orifice, median lyrula, and two wedge-shaped cardelles. Scale d. 



Figure G: Zooecium with heavily calcified peristome, deeply located lyrula, wide peri- 

 stomial notch or sinus. Scale d. 



Figure H: Cross section through a zooecium showing relative thickness of walls. Basal I 

 and side walls are thin, frontal wall thicker, mural rim or border thin and raised. Zooecia! 

 cavity shown In black. Scale c. 



Note: Figures A, D-H are from paratypes; B, C from the holotype. 



