BEYOZOAN FAUNA OF VINCENTOWN LIMESAND 99 



Plate 14 



Figures 1-3. Polycephalopora birostrata, new species (p. 59). 



1, The encrusting zoariurn with small ovicelled zooecia. 



2, Ancestrular portion of another example. 



3, An ovicelled zoariurn with large zooecia. 



4-7. Diacatithopora abbottii Gabb and Horn, 1862 (p. 65). 



4, Bilamellar specimen with irregular zooecia. The talon of 

 each avicularium is not on the same zooecium as its beak. 

 The epicalcification is individual. 



5, Surface of ovicelled specimen. The number and width of 

 the costules are variable. The distal pelmatidia is often 

 replaced by a pelma. 



6, Another specimen with irregular zooecia and more constant 

 avicularia. 



7, Surface of another example, showing structure of ovicells. 

 8,9. Diacanthopora distans Gabb and Horn, 1862 (p. 67). 



8, Zooecia showing the structure of the ovicell, which crowns 

 the zooecium and adds to its length. 



9, Surface of the encrusting colony with ovicelled zooecia. The 

 epicalcification is interzooecial and surrounds also the ovicell. 



Plate 15 



Figube 1. Hippaliosina aspera Gabb and Horn, 1862 (p. 81). 



Surface of the encrusting zoariurn. The frontal pores are false 

 tremopores. 

 2-7. Psilosecos muralis Gabb and Horn, 1862 (p. 83). 



2, Portion of the bilamellar zoariurn, slightly worn and with thick 

 walls. 



3, Young branch in which the frontal is little calcified. 



4, A bifurcated branch with thick walls. The distal avicularium 

 and the lyrule are buried under the thickness of the walls. 



5, Worn specimen. 



6, Three transverse sections; the zooecia are exactly opposite one 

 another. 



7, Longitudinal section. The zooecia are opposed, (a = aper- 

 tura; av=oral avicularium; z=zooecium.) 



8. Kleidionella (?) trabeoulifera, new species (p. 86). 



Surface of the bilamellar zoariurn, showing the urceolate zooecia 

 with the peristomies joined by trabeculae and the salient mucron. 



9. Flustrella cylindrica Gabb and Horn, 1862. 



The original illustration of some undetermined species from near 

 Mullica Hill, N.J., but possibly referring to Stamenocella ooulata 

 Ulrich and Bassler, 1907. 



