BRYOZOA OF THE PHILIPPINE REGION 421 



Philippines it does not pass beyond the 7th parallel. It has been 

 observed more to the north in the Gulf of Mexico and in the 

 China Sea. 

 Occurrence. — 



D. 5137. Jolo Light, Jolo; 6° 04' 25" N.; 120° 58' 30" E. 



20 fathoms; S., Sh. 

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



co. S. 

 D. 5144. Jolo Light, Jolo; 6° 05' 50" N.; 121° 02' 15" E. 



19 fathoms; co. S. 

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



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

 D. 5251. Gulf of Davao, Linao Point; 7° 05' 12" N.; 125° 39' 



45" E.; 23 fathoms; Co., S. 

 Gulf of Mexico, waters off Florida (14-71 m.) (Smitt). Pleis- 

 tocene of Panama Canal Zone. 

 Plesiotypes. —C&t. Nos. 8231-8232, U.S.N.M. 



HOLOPORELLA (?) CONVEXA, new species 



Plate 60, fig. 1 



Description. — The zoarium is free, unilamellar, and forms irregular 

 masses of more than 2 square cm. The zooecia are large, salient, 

 very convex; the frontal is smooth and surrounded by large areolar 

 pores. The apertura is suborbicular and surrounded by a thick 

 peristome; the latter bears a small avicularium more or less salient. 

 The interzooecial avicularia are relatively small, with convex walls; 

 their beak is rounded; the mandibular cavity is little deep. The 

 deep zooecia have their orifice alone visible. 



Measurements. — 



A . (k = 0.20mm. n • \Lz = 0.75 mm. 



Apertura 7 „ Zooecia \ 1 



r lZa = 0.20mm. Us = 0.60 mm. 



Length of zoarial avicularium = 0.50 mm. 



Affinities. — This species differs from Cellepora simplex MacGillivray, 

 1888, in the presence of areolar pores, in its smooth frontal, in its much 

 smaller micrometric measurements and in the avicularian beak not 

 acuminate but rounded. The marginal zooecia are oriented and little 

 cicct. Our specimens were dead. Having neither opercula nor 

 ovicell, our generic reference remains a little doubtful. 



Occurrence. — D. 5217. Anima Sola Island, between Burias and 

 Luzon; 13° 20' N.; 123° 14' 15" E.; 105 fathoms; crs. gy. S. 



Holotype.— Cut. No. 8233, U.S.N.M. 

 2182—29 28 



