BRYOZOA OF THE PHILIPPINE REGION 



329 



Subfamily Microporellae Canu and Bassler, 1917 

 Genus FENESTRULINA Jullien, 1888 



FENESTRULINA INFUNDIBULIPOR A. new species 



Plate 39, figs. 4-6 



Description. — The zoarium encrusts shells, nullipores and bryozoa. 

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

 hexagonal; the frontal is convex and covered by large infundibuliform 

 pores; the ascopore is orbicular, median and surrounded by a salient 

 peristome. The ovicell is salient, convex, hyperstomial, closed by the 

 operculum, marginated and of the same nature as the frontal; the 

 orifice of the ovicelled zooecia is larger. 



Measurements. — 



„ . iLz = 0M mm. 

 Zooecia , _ A __ 



mm. I Lz = 0.50-0.oo mm. 



Affinities. — This new species differs from Fenestrulina malusi 



avigny-Audouin, 1826, in its frontal entirely covered by pores. 



. (7ia = 0.10 mm. 



A P ertuI » Ia-0.12-0.15 



^ 



fi 



' J 



Fig. 134. — Opercula, etc., of Microporellae, X85 



A. Microporella ciliata Linnaeus, 1759. B, C. Inversiula inversa Waters, 

 1887. D-G. Fenestrulina infundibulipora, new species. D, E, F. Variations 

 in opercula. G. Small rods (diatoms?) in the cell. H-K. Calloporina sigillata, 

 new species. H. Avicularian mandible. I, J. Opercula with opaque armature. 

 K. Operculum with central armature transparent. 



It differs from Fenestrulina punctata Canu and Bassler, 1923, from 

 the Pleistocene of California in its orbicular ascopore, its infundi- 

 buliform and larger frontal pores and in its ovicell as wide as the 

 zooecium. 



The frontal of certain zooecia appears to be formed of 2 or 3 super- 

 posed pellicules. The operculum is bordered by a thick sclerite. 

 In the interior of the zooecia we have found some small hooks as in 

 Thalamoporella. 



Biology. — Almost all of our specimens were living. The reproduc- 

 tion and fixation were observed from February 15th to September 

 25th so that it is rather probable that this continued all the year 

 without interruption. There is no difference between the specimens 



