BRYOZOA OF THE PHILIPPINE REGION 111 



The cellular structure is rather far from that of Caberea Lamouroux, 

 1816 of the family Scrupocellariidae. 



Genus SYNAPTACELLA Maplestone, 1911 



"Zoaria free, rigid. Zooecia in a single series" (Maplestone). 

 Genotype. — SynaptaceUa asymetrica Maplestone, 1911 (first species). 

 Range. — Miocene of Australia. 



Genus HETEROCELLA Canu, 1907 



1920. Heterocella Canu and Bassler, Monograph North American Early Ter- 

 tiary Bryozoa, Bull. 106, U. S. National Museum, p. 198. 



Zoarium articulated, quadriserial. 



Genotype. — Heterocella (Vincularia) fragilis Defrance, 1820. 



Range. — Eocene (Lutetian). Recent. 



In 1920 Canu and Bassler doubtedly classified Heterocella in the 

 Farciminariidae. To-day we would ally this genus with the Synap- 

 tacellidae. The general aspect of the zooecia, the presence of an 

 interior opesium and of two distal septulae on the false cryptocyst 

 account for this change. The collection of better specimens is desira- 

 ble in order to clear up the structure of this mysterious genus. 



HETEROCELLA PENTAGONA, new species 



Plate 9, figs. 13-16 



Description. — The zoarium is articulated. The segments are very 

 long, thin at their base, much enlarged at their summit; they are 

 formed of five longitudinal rows of zooecia. The zooecia are distinct, 

 separated by a shallow furrow, elongated, elliptical; they are subrec- 

 tangular; the mural rim is thick, rounded, nondistinct from the 

 pseudocryptocyst which surrounds the interior opesium. The external 

 opesium is large, of the same form as the zooecium; the internal 

 opesium is small, submedian, orbicular or somewhat elongated, sur- 

 mounted by two large distal septulae. The ovicelled zooecia are larger 

 with two lateral septulae and a large distal septula surmounted by 

 a large ogival indentation. The zooecia increase in size from the base 

 to the summit of a segment. 



Measurements. — 



t • [Z2 = 0.90 mm. r\ ■ u i • [is =1.00 mm. 



Large zooecia , Ovicelled zooecia^, 



\lz = 0.70 mm. \lz = 0.G5 mm. 



T , i • I Lo = 0.25 mm. 



Internal opesia<L 



Uo = 0.25 mm. 



Affinities. — This species is not a typical Heterocella as it differs in 



its zooecial arrangement in five longitudinal ranges and not in four 



and in its opesia which do not converge two by two. Having only 



dead specimens, we did not believe it advisable to create a new 



genus for them. 



