808 ALLAN HANCOCK. PACIFIC EXPEDITIONS VOL. 14 



PLATE 75 



Fig. I. Disporflla 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. Disporflla fimhriata (Busk), the ovicel! obscured by heavy 

 calcification of the secondary canceili. 



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

 ing most of the central area, the ooeciopores marginal, 

 ooeciostomes not developed. 



Fig. 4. Dispori'lla ovoidea new species, outline showing ovate form 

 of zoarium and central area, uniserial radii and position 

 of ovicel 1. 



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

 covered by rounded secondary canceili, and interradial 

 ooeciostome ; beside this another interradial o\'icell dis- 

 sected away to show the cavity. 



Fig. 6. ? Disporflla octoradiata (\^'ate^s), a \()ung zoarium with- 

 out ovicell. 



Fig. 7. Disporella alaskcnsis ne\v 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. 



