444 BULLETIN 100, UNITED STATES NATIONAL MUSEUM 



Genus CLAVIPORELLA MacGillivray, 1895 



The perforated ovicell belongs to the mother zooecium of a tri- 

 globulus. The aperture is triangular in both forms of zooecia. On 

 either side of the aperture is a cylindrical acropetal spine, and the 

 pedal chamber situated far proximally, is rudimentary and only com- 

 municates with the zooecium through a single septula. Behind the 

 aperture there is an oval median pore, a remnant from the primary 

 frontal sinus. 



Genotypes. — Claviporella (Catenicella) longicollis Waters, 1893 

 (fossil), and Claviporella (Catenicella) geminata W. Thompson, 1858 

 (recent). 



Range. — Miocene of Australia. Recent. 



Fig. 177. — Genus Strongylopora Maplestone, 1899 



A-D. Strongylopora pulchella Maplestone, 1880. A. General aspect, an ovi- 

 celled branch, dorsal and frontal. (After MacGillivray, 1885.) B. With ovicell, 

 X40. C. A longitudinal section through a lateral margin of the zooecium. 

 Uppermost the small suprascapular chamber and lowermost the inner wall of the 

 long scapular chamber which is connected with the zooecium through two uni- 

 porous septulae, X75. D. A transverse section through a zooecium. The 

 extremely thick walls which separate the lateral chambers from the zooecium are 

 seen, X75. (B-D. After Levinsen, 1909.) 



Genus SCUTICELLA Levinsen, 1909 



The ovicell is a terminal gonoecium. The operculum has a straight 

 or but slightly curved edge. The operculum of the gonoecium 

 much wider has a straight proximal edge. The sternal area has 3-14 

 fenestrae disposed in a curve or an angle and on its inner surface a 

 rounded calcareous lamina springing from the proximal margin of the 

 aperture. The proximal margin of the apertura may be straight, 

 concave or convex, sometimes with a small sinus or indentation, to 

 which, however, the operculum never corresponds. The lateral 

 chambers are wholly or mostly membraneous, and the adzooecial, 

 scapular chamber of the daughter-zooecium is never developed into 

 an avicularium. 19 tentacles. 



Genotype. — Scuticella (Catenicella) phgiostoma Busk, 1852. 



Range. — Recent. 



