312 BULLETIN 100, UNITED STATES NATIONAL MUSEUM 



D. 5145. Jolo Light, Jolo; 6° 04' 30" N.; 120° 59' 30" E.; 23 



fathoms; co. S. Sh. 

 D. 5579. Sibutu Island, Darvel Bay, Borneo; 4° 54' 15" *N.; 

 119° 09' 52" E.; 175 fathoms; fine S., co.; 13° C. 

 Eolotype.— Cat. No. 8066, U.S.N.M. 



GEMELLIPORA BIAVICULARIA, new species 



Plate 34, fig. 7 



Description. — The zoarium encrusts shells and -orbitoides. The 

 zooecia are distinct, separated by a furrow somewhat elongated, 

 much enlarged and deformed by a large, lateral, elliptical avicula- 

 rium with pivot; the frontal is convex, ornamented with large tremo- 

 pores borne on the olocyst; there is a second small median, transverse 

 avicularium with pivot. The apertura is elongated, triangular, with 

 two characteristic cardelles on each side. The ovicell is globular and 

 buried in the distal zooecium. 



Measurements. — 



A . ffta = 0.14mm. n • \Lz = 0.36-0.40 mm. 



Apertura, n nn Zooecia 7 



F Ua = 0.08mm. iZ2 = 0.30mm. 



Affinities. — The presence of two avicularia very well characterizes 

 this species; however, the small median avicularium is sometimes 

 lacking. In the interior the olocyst is rather thick. It is perforated 

 at the level of the tremopores. The operculum is thick. 



Biology. — The species was in reproduction and fixation on March 26, 

 1908 (locality D. 5179). The specimens from other localities were 

 very rare and dead. 

 Occurrence. — 



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. 

 D. 5179. Romblon Light, Romblon; 12° 38' 15" N.; 122° 12' 



30" E.; 37 fathoms; hard S.; 24.2° C. 

 D. 5478. Tacbuc Point, Leyte; 10° 46' 24" N.; 125° 16' 30" 

 E.; 57 fathoms; Sh. 

 Holotype.— Cat. No. 8067, U.S.N.M. 



GEMELLIPORA MINUTIPORA, new species 



Plate 35, figs. 1, 2 



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

 tinct, separated by a furrow, somewhat elongated, deformed by an 

 enormous lateral avicularium, the orifice of which is in the vicinity 

 of the apertura; the frontal is covered with very small tremopores 

 and surrounded by larger areolar pores. Sometimes there is a second, 

 smaller avicularium on the other side of the apertura. The apertura 



