BRYOZOA OF THE PHILIPPINE REGION 311 



merited with very small tremopores; the frontal avicularimnjs trans- 

 verse, elliptical, with pivot. The apertura is elongated, triangular; 

 the' peristone is much developed, very salient, more or less complete, 

 infundibuliform. 

 Measurements . — 



Apertura j*" = n °i° mm ' Zooecialf z =^ mm ' 



F ila = 0.07 mm. \lz = 0.35 mm. 



This species is very well characterized by its peristome. The 

 operculum shows two lateral habitual and characteristic indentations. 

 Our specimens were living but not ovicelled. 



Occurrence. — D. 5151. Sirun Island, Sulu Archipelago; 5° 24'40" 

 N.; 120° 27' 15" E.; 24 fathoms; co. S., Sh. 



Holotype.— Cat, No. 8064, U.S.N.M. 



GEMELLIPORA PUNCTATA, new species 



Plate 34, fig. 8 



Description. — The zoarium encrusts fragments of shells. The 

 zoaria are distinct, separated by a furrow, little elongated, broad, 

 deformed laterally by a large avicularium with pivot; the frontal is 

 convex, punctured with large tremopores and bears in the vicinity of 

 the poster a small transverse avicularium with pivot. The apertura 



C . 



Fig. 130. — Opercula of Schizoporellae, X85 

 A. Gemellipora peristomaria, new species. B. Gemellipora biavicularia, new 

 species. C. Gemelliporella areolata, new species. D, E. Schizoporella costu- 

 lata, new species. 



is large, triangular, elongated, with two triangular cardelles charac- 

 teristic of the genus. The ovicell is large, globular, porous, buried in 

 the distal zooecium. 

 Measurements. — 



Apertura^ - 14 - - 16 mm ' Zkx>ecia(^ = - 48 -°- 50 mm * 



IZa = 0.10mm. I lz = 0.36-0.40 mm. 



Affinities. — This superb species possesses two avicularia as in Gem- 

 ellipora biavicularia but differs from it in its much larger measure- 

 ments and in the presence of much larger and more numerous tremo- 

 pores. Of all of the known species it bears the largest tremopores; 

 these are generally very small and often little visible. 



Our specimens were dead. Those from the China sea (175 fathoms) 

 showed no differences from the others. 



Occurrence. — 



D. 5134. Balukbaluk Island, Sulu Archipelago; 6° 44' 45" N.; 

 121° 48' E.; 25 fathoms; fine S. 



