BRYOZOA OF THE PHILIPPINE REGION 333 



MICROPORELLA VENTRICOSA, new species 



Plate 40, fig. 6 



Description. — The zoarium encrusts shells and especially pebbles. 

 The zooecia are distinct, separated by a furrow, very little elongated, 

 hexagonal, swollen; the frontal is convex, covered with very small, 

 little visible tremopores; the ascoporo is large, orbicular, surrounded 

 by a very salient peristome. The apertura is scmielliptical, trans- 

 verse; the peristome is salient and bears 4 short, hollow spines. A 

 lateral, triangular avicularium appears at the level of the ascopore. 



Measurements. — 



Uia^O.lO mm. „ . fZz-=0.75 mm. 



Apertura , _ ., _ Zooecia 7 _ __ 



Ua-=0.15mm. [lz -=0.70 mm. 



Affinities. — The frontal pores of this species are still finer and more 

 numerous than those of Microporella lieermanni Gabb and Horn, 1862. 

 Occurrence. — 



D. 5151. Sirun Island, Sulu Archipelago; 5° 24' 40" N.; 120° 



27' 15" E.; 24 fathoms; co. S., Sh. 

 D. 5162. Tinagta Island, Tawi Tawi Group; 5° 10' N.; 119° 



47' 30" E.; 230 fathoms; S. brk., Sh. crs. 

 D. 5217. Anima Sola Island, between Burias and Luzon; 

 13° 20' N.; 123° 14' 15" E.; 105 fathoms; crs. gy. S. 

 Holotype.—C&t. No. 8109, U.S.N.M. 



Genus CALLOPORINA Neviani, 1895 



CALLOPORINA SIGILLATA, new species 



Plate 40, figs. 9, 10 



Description. — The zoarium encrusts nullipores, shells, foraminifera, 

 and sea urchins; the ectocyst is yellow or rose color. The zooecia 

 are distinct, separated by a deep furrow, elongated, elliptical, irregu- 

 lar; the frontal is convex, surrounded by interareolar, salient costules; 

 the ascopore is orbicular and very salient; the two triangular, lateral 

 avicularia have their pivots placed between the ascopore and the 

 apertura. The apertura is scmielliptical, elongated; the peristome 

 is very thick, very salient and bears 6 large hollow spines. The 

 ovicell is large, globular, decorated with from 2 to 3 semicircular, 

 deep furrows. 



Measurements. — 



A . [7ta<=0.15 mm. ~ • fig =0.75 mm. 



Apertura, Zooecia, „ , „ 



Ua =--0.12 mm. lis =0.45 mm. 



Affinities. — This splendid species is ornamented with sculpture in 

 relief which highly decorates it. This same ornament exists on 

 Microporella decorata Reuss, 1847, but it is there more attenuated and 

 the micrometric measurements are much smaller. 



