NO. 3 OSBURN : EASTERN PACIFIC BRYOZOA CYCLOSTOMATA 679 



3. Ooeciostome curved or bent forward 4 



Ooeciostome straight, though the opening may be directed 



somewhat forward 6 



4. Branches of zoarium strongly curved forward; ooeciostome 



curved forward, its aperture elh'ptical and its proximal lip 



somewhat inflected eburnea 



Branches straight and more divergent 5 



5. Ooeciostome long, slender, conspicuously bent forward, its 



pore round pugeti 



Ooeciostome short, pore elliptical; internodes long . . serrulata 



6. Branches of zoarium curved inward or spicate at the tips; 



ooeciostome short, pore round or short elliptical . . occidentalis 

 Branches straight and stiff, internodes long 7 



7. Ooeciostome distinctly flared at the tip, transversely long- 



elliptical; a northern species cribraria 



Ooeciostome not flared, short and inconspicuous, pore round 



and opening forward maxima 



Grisia serrulata, new name 

 Plate 72, fig. 2 



Crisina serrata Gabb and Horn, 1862:174. (Preoccupied by d'Orbigny, 



1853:598). 

 ? Crisia denticulata, Hlncks, 1884:203. 

 Crista pacifica Robertson, 1910:242. 

 Crisia pacifica, O'Donoghue, 1923:7. 

 Crisia serrata, Canu and Bassler, 1923:196. 

 Crisia serrata, O'Donoghue, 1926:18. 



Zoarium forming bushy tufts reaching a height of 25 mm. The inter- 

 nodes are long, ranging from 12 to more than 30 zooecia, the longer 

 ones slightly sinuate and not inflected ; joints yellow to brownish ; basis 

 rami of a branch short and wedged in between the zooecia without dis- 

 turbing their position. The zooecia are connate nearly to their tips which 

 turn forward sharply, the aperture facing frontally; the dorsal lip of 

 the aperture sometimes with a low point. The frontal surface of the 

 branch bears a median keel and the distance between the zooecial aper- 

 tures is less than the width of the branch. 



The ovicell is large, a little flattened, inclined in the axis of the branch 

 and adnate for its whole length; the tube of the ooeciostome is short, 

 opening either ventrally or distally, the aperture more or less elliptical. 



