BRYOZOA OF THE PHILIPPINE REGION 313 



is elongated, triangular, with two small cardelles and a sharp pointed 



rimule. The ovicell is globular, buried in the distal zooecium not 



closed by the operculum. 



Measurements. — 



[k = 0.18mm. „ . f £2 = 0.60 mm. 



Apertura , . i0 Zooecia 7 _ ._ A „ n 



Ua = 0.12 mm. [lz = 0.40-0. oO mm. 



Affinities. — This species differs from Gemellipora auriculata Maple- 

 stone, 1901, in its much larger micrometric dimensions and its avic- 

 ularia placed higher and at the side of the apertura. The tremopores 

 are generally visible only at a magnification of 50 diameters or more. 

 Biology. — The larva affixes itself only on small convex shells which 

 makes the photography of the colony quite difficult. Our specimens 

 were dead. Species of Gemellipora are abundant in the channels 

 which connect the Sulu Sea with the Pacific. 

 Occurrence. — 



D. 5213. Destacado Island, east of Masbate Island; 12° 15' N.; 



123° 57' 30" E.; 80 fathoms; S. M. Sh. 

 D. 5392. Tubig Point, Destacado Island; 12° 12' 35" N.; 124° 

 02' 48" E.; 135 fathoms; gn. M., S. 

 Cotypes.— Cat, No. 8068, U.S.N.M. 



GEMELLIPORA OBESA, new species 



Plate 35,' figs. 3, 4 



Description.— The zoarium encrusts fragments of shells. The 

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

 deformed, obese; the frontal is covered with very small tremopores 

 and covered with large much decorated granules. Below the aper- 

 tura there is a large transverse elliptical avicularium with denticles. 

 Frequently there is a second smaller avicularium at the side of the 

 apertura. The apertura is triangular, elongated, with a very straight, 

 proximal rimule. 



Measurements. — 



fk = 0.15 mm. rj . (£2 = 0.50-0.60 mm. 



Apertura , _ _. Zooecia, n . _ „,,_ 



Ua = 0.09 mm. I lz = 0.45-0.05 mm. 



Affinities. — The interior of the olocyst is very thin and the tremo- 

 pores which are little visible externally can be seen by transparency. 

 Although quite rare, this small species appears charming to us and 

 deserving of illustration. 



Occurrence. — D. 5579. Sibutu Island, Darvel Bay, Borneo; 4° 54' 

 15" N.; 119° 09' 52" E.; 175 fathoms; fine S., Co. 



Cotypes.— Cat. No. 8069, U.S.N.M. 



