BRYOZOA OF THE PHILIPPINE REGION 267 



Genus COLEOPORA Canu and Bassler, 1927 



The zooecia are exceptionally large; the frontal is a tremocyst with 

 small pores. The ovicell is hyperstomial and never closed by the 

 operculum. The apertura is buried at the bottom of a long tubular 

 peristomie with structure different from that of the frontal. The 

 operculum bears two long lateral attachments. 



Genotype. — Coleopora verrucosa Canu and Bassler, 1927. 



Range. — Miocene (Tortonian) to Recent. 



We believe that it is indeed the shield which forms the character- 

 istic peristomie, for on certain decorticated zooecia one can note 

 that their exterior peristomie envelopes a primitive peristome. 

 The peristomial lyrule so frequent in Petraliella appears here only 

 sporadically. 



This is a typical genus of waters with little depth for the known 

 species live in preference from 36 to 55 meters. Specimens dredged 

 at greater depths were dead. One fossil species Coleopora tubulosa 

 Canu and Bassler, 1927, has been discovered by us in the Tortonian 

 (Miocene) of Austria-Hungary and another Coleopora granulosa Canu 

 and Bassler, 1928, in the Pliocene of Panama. 



COLEOPORA VERRUCOSA Canu and Bassler, 1927 



Plate 20, fig. 4. Plate 26, fig. 9 



1927. Coleopora verrucosa Canu and Bassler, Classification Cheilostomatous 

 Bryozoa, Proc. U. S. National Museum, vol. 69, Art. 14, p. 6, pi. 1, fig. 7. 



Description. — The zoarium encrusts shells. The zooecia are dis- 

 tinct, separated by a furrow, very large, elongated, ovoid; the frontal 

 is convex, punctured by small very numerous tremopores among 

 which spring forth salient thickened tubes giving to it a verrucose 

 aspect; the shield is tubular, salient, provided with irregular distal 

 spicules and with an enlarged lip in front of the aperture. The 

 aperture hidden at the bottom of the peristomie is orbicular; its 

 peristome is thin and often apparent with perpendicular illumination. 

 The peristomice is irregularly elliptical, thick, crenulated. The 

 ovicell is globular. 



Measurements. — 



. \ha=0.25 mm. „ . \Lz =1.00-1.15 mm. 



Aperture^ ^ 2? _ 3() mm Zooeciaj^ ^ Q 75 _ 90 mm 



Affinities. — This species has the aspect of a giant Lagenipora, but 

 the peristomie of very different origin shows peculiarities unknown 

 in that genus. Thus it is ornamented especially distally with flat 

 spicules, irregular in form and position ; the latter are not hollow and 

 cylindrical like the spines. 



The frontal is formed of a weblike network perforated by very 

 small tremopores, an arrangement different from the structure in 

 Petraliella. The operculum is semielliptical. It is circumscribed by 



