BRYOZOA OF THE PHILIPPINE REGION 547 



Genus PLEURONEA Canu and Bassler, 1920 



PLEURONEA (?) DECORATA, new species 



Plate 85, figs. 6-9 



Description. — The zoarium is free, bifurcated, borne on a little 

 expanded base, and little adherent to the substratum; the dorsal is 

 plane, ornamented with ascending tergopores; the latter are closed by 

 a concentrically wrinkled epitheca. The tubes are distinct, separated 

 by a little salient thread, convex longitudinally. The fascicles are 

 salient not projecting beyond the zoarial margin, formed of 3, 4, or 5 

 tubes, alternating on each side of the median axis. 



Measurements. — Diameter of peristomes, 0.10 mm.; distance of 

 fascicles, 0.24-0.30; number of zooecia to fascicle, 3, 4, or 5; and 

 zoarial width, 0.60-1.00. 



Affinities. — This species is splendidly decorated by its beautiful, very 

 convex and regular dorsal wrinkles which sufficiently characterize it. 

 They are analogous to the well-marked wrinkles which we have noted 

 in Diaperoecia radicata Kirkpatrick, 1888. Here the colony is erect 

 and does not bear colonnettes. 



The figured specimens are of young colonies, but on the more com- 

 plete examples the branches are wider and more vigorous. The 

 tergopores are always covered in the inferior part. The ovicell is 

 not known. 



Occurrence. — 



D. 5137. Jolo Light, Jolo; 6° 04' 25" N.; 120° 58' 30" E.; 20 



fathoms; S. Sh. 

 D. 5145. Jolo, Sulu Archipelago; 6° 04' 30" N.J 120° 59' 30" 

 E.; 23 fathoms; co. S., Sh. 



Cotypes.—C&t. No. 8401, U.S.N.M. 



PLEURONEA (?) STRIATA, new species 



Plate 85, figs. 10-13 



Description. — The zoarium is free, subcylindrical, bifurcated with 

 short, straight, or curved branches; the dorsal is quite convex, striated 

 longitudinally by the walls of the tergopores. The tubes are distinct, 

 separated by a salient thread, small; the fascicles are salient, do not 

 project beyond the zoarial margins, and are formed of 5 tubes with 

 orbicular peristomes. 



Measurements. — Diameter of peristomes, 0.08 mm.; distance of 

 fascicles, 0.32-0.36; number of tubes to fascicle, 5; and zoarial width, 

 0.70. 



Structure. — In longitudinal section the tubes are conical, with 

 triparietal gemmation. The tergopores are numerous, very long, 

 cylindrical; their form is very close to that of nematopores, but the 

 latter are always short with the terminal walls often thickened. The 

 size of the tergopores appears quite variable in the genus Pleuronea 



