BRYOZOA OF THE PHILIPPINE REGION 373 



Our specimens were dead and reduced to very small fragments. 

 Occurrence— D. 5478. Tacbuc Point, Leyte; 10° 46' 24" N.; 125° 

 16' 30" E.; 57 fathoms; Sh. (common). 

 Cotypes.—C&t. No. 8164, U.S.N.M. 



TRIPHYLLOZOON MAGNISCUTULATUM, new species 



Plate 49, figs. 7-12 



Description. — The zoarium is free, not bush like; the fenestrules (or 

 meshes of the network) are very large, elongated, fusiform, wider than 

 the trabeculae; the branches bear very frequently only two longi- 

 tudinal rows of zooecia; the dorsal is finely granulose, decorated with 

 longitudinal vibices and small poriform avicularia. The zooecia are 

 distinct, separated by a salient thread, elliptical; the frontal is smooth, 

 concave longitudinally, ornamented with a small elliptical avicularium 

 or with a large spatulated avicularium. The peristome is incom- 

 plete, very salient in its proximal portion where it bears a small 

 spiramen; the apertura is semielliptical with a concave proximal 

 border. The ovicell is large, globular, magnificently decorated with 

 the characteristic trifoliated stigma. 



Measurements. — 



w . . . [fern =0.08 mm. „ . \Lz =0.42-0.44 mm. 



Penstomice , . rt ,_ Zooeciai-, n nn 



llpi =0.10 mm. Hz =0.20 mm. 



~ . „jho =0.30 mm. Large avicular-fZa =0.22 mm. 



Uo = 0.24 mm. ium Ua =0.08 mm. 



^ . \L = 1.20-1.40 mm. 



Fenestrules , 7 



U =0.50-0.60 mm. 



Variations. — The spiramen is often replaced by a pseudorimule 

 more or less broad. The small avicularia are elliptical, always placed 

 laterally on the frontal; the large avicularia are sometimes acuminate 

 and sometimes widely spatulate at their extremity. The small 

 avicularia have no definite position but the large avicularia are always 

 placed on the borders of the fenestrules. 



The operculum is small with a concave proximal border and double 

 distal sclerite. Finally the dorsal avicularia always placed in the 

 vicinity of the fenestrules are lacking on many of the trabeculae. 

 (See text fig. 141.) 



Affinities. — This species differs from Betepora gigantea Busk, 1884, 

 in its zooecial dimensions, much smaller fenestrules, and in the nature 

 of its dorsal. 



Biology. — Our specimens were living and were in reproduction on 

 January 5, 1909 (106 meters). 



Occurrence. — D. 5356. Balabac Light, north of Balabac Strait; 8° 6' 

 40" N.; 117° 18' 45" E.; 58 fathoms; S. Sh. (common). 



Cotypes.—C&t. No. 8165, U.S.N.M. 

 2182—29 25 



