BRYOZOA OF THE PHILIPPINE REGION 285 



This is an equatorial genus. The ovicell opens into the peristomie. 



Affinities. — Stenopsis differs from Galeopsis Jullien, 1903, in the 

 absence of cardelles and in its opercula without bands or points. It 

 differs from Gigantopora Ridley, 1881, which it resembles in general 

 aspect, in the presence of a granular tremocyst. It differs from 

 Gephyroplwra Busk, 1884, in its longer peristomie and in the absence 

 of rimule and points to the operculum. 



Genus GIGANTOPORA Ridley, 1881 



GIGANTOPORA UNIROSTRIS, new species 



Plate 28, fig. 8 



Description. — The zoarium encrusts shells. The zooecia are 

 distinct, separated by a deep fur- . -.^ /—s> 



row, very elongated, subcylin- ^ ^/^M^^f-^^^X 

 drical; the peristomie is large, .(-».. ~^^^,?-yf:l^P > } /;i^ ^ » 

 longer than half of the zooecium, ^£;i^* ^^&*$&?&'J / J<t 

 smooth, limited by an enormous 



*ki~<miMU 



-~ ( /*r- 



salien t, transverse spiramen almost &\*i« * 





as wide as the , zooecium; the 



frontal situated in the inferior 



part bears only very short and "'•£• 



small spicules. The apertura Fig. 117.— Genus Pachysiomaria 



bears a short rimule. The per- MacGillivray, 1895 



istomice is elliptical, transverse, Pachysiomaria parvipuncla MacGill- 



surrounded by a fringed per- ivray, 1895. MacGillivray's original 



istome. The ovicell is small, con- fi s ure > which does not show the s P ira - 



,i men. Miocene of Australia. 

 vex, transverse, opening into the 



peristomie. Each zooecium bears laterally on the peristomie a 



triangular avicularium in which the beak is turned toward the 



aperture. 



Measurements. — 



v . , . \hp -0.08-0.10 mm. „ . rZ2=0.50mm. 



Penstomice / nionir Zooecia, . __ 



[Ip -0.12-0.15 mm. \lz =0.30 mm. 



Affinities. — This new species differs from Galeopsis columnata 

 Waters, 1881, and from Galeopsis tuberculosa Maplestone, 1902, in 

 its encrusting zoarium, in the presence of a single avicularium and 

 in its spiramen placed at the middle of the zooecium (and not in the 

 superior third). It differs from Gigantopora lyncoides Ridley, 1881 

 in the presence of its large peristomial avicularia. Our specimen 

 was dead. 



Occurrence.— D. 5137. Jolo Light, Jolo; 6° 04' 25" N.; 120° 58' 

 30" E.; 20 fathoms; S. Sh. 



Holotype. —Cat. No. 8035, U.S.N. M. 



