BRYOZOA OF THE PHILIPPINE REGION 427 



tarn Kirkpatrick is a distinct species, for the differences cited by 

 Kirk pat rick and Marcus appear to us very large; but we do not have 

 the data for comparison. 

 Occurrence — D. 5134. Balukbaluk Island, Sulu Archipelago; 6° 44' 



45" V; 121° 48' E.; 25 fathoms; fine S. 



Geographic distribution. — Pacific: Cape York, 8 fathoms (Busk); 

 Cape Tauhert (Marcus), Australia; Thursday Island (Haswell), 

 Albany Passage, 10 fathoms; Saibai Channel, 10-17 fathoms; Torres 

 Strait (Kirkpatrick). 



Plesiotype— Cat. No. S245, U.S.N. M. 



HOLOPOKELLA REPENS, new species 



Plate 62, figs. 2-6 



Description. — The zoarium is large, lamellar, expanded, formed of 

 a large number of irregular superposed lamellae; on the inferior face 

 the zooecia are distinct, arranged in longitudinal or radiating rows 

 with the dorsal ornamented by scattered granules. The zooecia are 

 distinct, separated by a furrow, very little erect, more or less elongated 

 very irregular; the frontal is granular, surrounded by areolar pores 

 and terminated by a very salient oral beak. The aperture is semi- 

 elliptical, transverse. The ovicell is hyperstomial, globular, sur- 

 rounding almost all of the aperture. There are incomplete zooecia 

 and some deep zooecia. 



,, . \ha =0.12-0.16 mm. 



Measurements.- Apertura , , ,„ 



I la =0.20 mm. 



Variations. — The transverse section is not that of a true Cellepore; 

 the zooecia are arranged in superposed lamellae and appear little 

 accumulated. This peculiarity arises from the little erect arrange- 

 ment of the zooecia. However the presence of incomplete zooecia 

 and of deep zooecia, the irregularity of the zooecial measurements, 

 the very variable cellular orientation are on the contrary features 

 absolutely characteristic of the Celleporidae. 



Although free, the zoarium is attached to a Tridacna on which the 

 larva was undoubtedly fixed. Sometimes very short cylindrical pil- 

 lars appear as in Holoporellapilaej era. Finally another characteristic 

 of this species is the formation of a salient ovicell on the deep 

 zooecia which is very rare in the Celleporidae. Our specimens were 

 dead. 



Occurrence. — From an unknown Philippine locality. 



Holotype.— Cat. No. 8246, U.S.N. M. 



HOLOPOKELLA SIBFLAVA. new species 



Plate (il, fiirs. 11, 12 



Description. — The zoarium is free, orbicular, fragile, yelloicis/t, 

 forming a somewhat convex mass. The zooecia are obliquely erect; 

 the frontal is convex, very finely granular, surrounded by very small, 



