BRYOZOA OF THE PHILIPPINE REGION 385 



in the pcristomie; it is supported on the inner lateral border of the 



peristome and & fissure separates it from the other border. 



Measurements. — 



T , [ftp =0.15 mm. „ . \Lz =0.40-0.50 mm. 



Penstomice \ r Zooeeia , A n „ _ or _ 



iZp=0.10mm. [Zz =0.20-0.25 mm. 



Affinities. — At the extremity of the fronds, the avicularium of the 

 young zooeeia is not yet lodged in the peristomie; it is exterior and 

 salient. It becomes immersed progressively with the thickening of 

 the calcareous walls. 



This new species differs from Bracebridgia pyrijormis Busk, 1885, 

 in the absence of an oral mucro and in the presence of a fissure in the 

 pcristomie. All our specimens were dead. 

 Occurrence. — 



D. 5141. Jolo Light, Jolo; 6° 09' N.J 120° 58' E.; 29 fathoms; 



Co. S. 

 D. 5147. Sulade Island, Sulu Archipelago; 5° 41' 40" N.; 120° 



47' 10" E.; 21 fathoms; co. S., Sh. 

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

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

 Holotype— Cat, No. 8172, U.S.N.M. 



Genus TRIPORULA Canu and Bassler, 1927 



The apertura is semicircular. The peristomice is elliptical and 

 transverse. The frontal is covered by stellate pores, each placed in 

 a polygonal area. There are three avicularia adjacent to the aper- 

 ture, two proximal to the beak oriented superiority and one distal to 

 beak oriented inferiorily. No spines. No oviccll. 



Genotype. — Triporula (Escharipora) stellata Smitt, 1873. 



Range. — Miocene. Recent. 



The generic name is in allusion to the presence of three oral 

 avicularia. 



The only known species are: Triporula (Escharipora) stellata 

 Smitt, 1873, Recent (Gulf of Mexico). Triporula maplestoniana, new 

 name. Proposed for Escharipora stellata Maplestone, 1904, not 

 Smitt, 1873, Miocene of Australia. Although Smitt, 1873, cited his 

 species as common in the Gulf of Mexico, we have not had the chance 

 to discover a specimen in the dredgings of the Albatross. 



This genus appears naturally placed in the group of Adeonidae 

 without gonoecia with Inversiula, Cyclostomella and Anarthropora. 

 The principal relationships are with the latter genus, from which it 

 differs simply in the presence of two proximal avicularia arranged 

 symmetrically. 



Family HIPPOPODINIDAE Levinsen, 1909 



Most of the genera now referred to this family are described in our 

 works of 1920 and 1923. 



