NO. 3 OSBURN : EASTERN PACIFIC BRYOZOA CYCLOSTOMATA 627 



distributed and not seriated, free with a few exceptions where two are 

 connate at the base, slender with an outside measurement of 0.09 mm. 

 The apertures are round and about 0.07 mm in diameter. The tubules 

 are so much embedded that their measurements cannot be determined, 

 the surface with minute pores and light transverse striae. 



There are 3 ovicells side by side, occupying practically the full width 

 of the terminal border, each broadly pyriform and with short lobes be- 

 tween the surrounding peristomes; a little ventricose and cross-striated 

 and the surface with minute pores. The ooeciostome is erect and mode- 

 rately high, situated beside a peristome with which it is connate at the 

 base and the upper portion free, its base cylindrical and about 0.05 mm 

 in diameter, the tip expanded transversely and its aperture measuring 

 about 0.09 by 0.03 mm. 



The basal portion alone would readily be mistaken for a species of 

 Proboscina, but the expanded part is similar to that of Oncousoecia in 

 the nature of the ovicells and ooeciostomes. 



Type, AHF no. 88. 



Type locality, off Rocky Point, southern California, about 33°49'N, 

 encrusting a sunken buoy recovered from a depth of 45 fms, one colony 

 by Earl Fox. Also one colony collected at Santa Barbara Island by 

 Dr. H. R. Hill. 



Family DiastOporidae Gregory, 1899 



Diastopora Lamouroux, 1821 ; Berenicea Lamouroux, 1821 ; Mesen- 

 teripora Blainville, 1830; Bidiastopora d'Orbigny, 1849; Actinopora 

 d'Orbigny, 1853; Microecia Canu, 1918; Plagioecia Canu, 1918; Di- 

 aperoecia Canu, 1918; Diplosolen Canu, 1918. 



Diastopora, genotype D. foliacea Lamouroux, 1821 :42, though it was 

 described from a fossil without ovicells, has rather definite zoarial char- 

 acters and has been much used for recent as well as fossil species. In 

 the absence of an ovicell, however, it is impossible to place this genus 

 except as a member of the present group. It is useful to the paleontolo- 

 gists when ovicells are wanting, but should not be used when the ooecial 

 characters are present. 



Berenicea, genotype B. prominens Lamouroux, 1821 :80, is so indefi- 

 nite as to be meaningless. Norman, 1903:569 and 1909:299, and Borg, 

 1944:61, have maintained that Berenicea is not even a cyclostome but a 

 cheilostome form. Diastopora and Berenicea have been used rather 

 indiscriminately for the same species. If they are synonymous, Di- 



