808 ALLAN HAXCOCK PACIFIC EXPEDITIONS VOL. 14 



PLATE 75 



Fig. 1. Disporclla liispida (Fleming), showing form of zoarium, 

 scattered peristomes, small cancellar pores, and two ooecio- 

 stomes near the border indicating the presence of inter- 

 radial ovicells. 



Fig. 2. Disporclla fimhriala (Busk), the ovicell obscured by heavy 

 calcification of the secondary cancelli. 



Fig. 3. The same, a younger zoarium with three ovicells occupy- 

 ing most of the central area, the ooeciopores marginal, 

 oneciostomes not developed. 



Fig. 4. Disporclla o-voidca new species, outline showing ovate form 

 of zoarium and central area, uniserial radii and position 

 of ovicell. 



Fig. 5. The same, much enlarged, an interradial ovicell at left 

 covered by rounded secondary cancelli, and interradial 

 ooeciostome ; beside this another interradial ovicell dis- 

 sected away to show the cavity. 



Fig. 6. } Disporclla oduraJiata (\^'aters), a young zoarium \vith- 

 out ovicell. 



Fig. 7. Disporclla alaskcnsis new species, side view, showing the 

 height of the radii, the upturned margin and the small 

 daughter zoarium. 



F'ig. 8. The same, frontal view, showing the complex nature of the 

 radii, the position of the ovicell (roof broken away) and 

 the position of the submarginal vertical bud of the daughter 

 zoarium. 



