BRYOZOA OF THE PHILIPPINE REGION 



567 



1922. Tretocycloecia pelliculata Canu and Bassler, Studies on the Cyclostoma- 

 tous Bryozoa, Proceedings U. S. National Museum, vol. 61, p. 110, pi. 13, 

 figs. 9, 10 (ovicell). 

 Measurements. — Diameter of large branches, 3.00 mm.; diameter of 



apertures, 0.10-0.12. 



Variations. — The peristome is thick and slightly salient. The 



zoarium is sometimes hollow in the inferior part. Other branches 



have adventitious pellicles forming a partial superposed lamella. 



The mesopores are small, numerous in certain places, rare at others. 

 The sections which we figured in 1920 were made from American 



specimens (California) of which we are not certain of the determina- 



Fig. 224. — Tretocycloecia pelliculata Waters, 1879. Longitudinal 

 and transverse thin sections, X25 



tions made after Miss Robertson. We have now studied new sections 

 made from Japanese specimens in which the structure is the same. 

 Under the name of Heteropora pelliculata there are certainly various 

 species confounded. 



Occurrence— D. 4807. Cape Tsiuka, Sea of Japan; 41° 36' 12" N.; 

 140° 36' E.;Sagami Bay (Ortmann); Tatar Gulf (13-37 fathoms.) 

 (Waters). 



Geographic distribution. — Pacific. Shores of Alaska, Vancouver and 

 California (Robertson); Australia (Waters); New Zealand (Busk). 

 Fossil in the Miocene of New Zealand (Waters). 



Plesioty pes— Cat. No. 8412, U.S.N. M. 



