BRYOZOA OF THE PHILIPPINE REGION 127 



RECTONYCHOCELLA OVALIS, new species 



Plate 12, fig. 11 



Description. — The zoarium is free and bilamellar. The zooecia 

 are distinct, separated by a furrow, elongated, ogival; the mural rim 

 is very thin, rounded, little salient, finely granular; the cryptocyst is 

 concave, smooth, of little depth. The opesium is oval, the point at 

 top, without opesiular indentations. The onychocellarium is broad, 

 fusiform of the same length as the zooecia; its opesium is elliptical. 

 Measurements. — 

 Opesium of r7io = 0.24 mm. 7 . jLz = 0.44-0.48 mm. 



zooecium \lo = 0.20 mm. Us = 0.36 mm. 



Opesium of ony- f ho = 0. 16 mm. n l U ' 1^071 = 0.50 mm. 

 chocellarium \Zo = 0.10 mm. [lon = 0.40 mm. 



Affinities. — This species differs from Rectonychocella grandipora in 

 its smaller dimensions, in its superficial cryptocyst and in the total 

 absence of opesiular indentations. Our specimens were rare and 

 dead. 



Occurrence. — 



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



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

 D. 5580. Sibutu Island, Darvel Bay, Borneo; 4° 52' 45" N.; 

 119° 06' 45" E.; 162 fathoms; br. S., co.; 13.2° C. 

 Holotype—C&t. No. 7925, U.S.N.M. 



RECTONYCHOCELLA GRANDIPORA, new species 



Plate 13, figs. 5-7 



Description. — The zoarium is free and bilamellar. The zooecia 

 are distinct, large, elongated, ogival, united by their mural rim; the 

 mural rim is thin, salient, round, smooth; the cryptocyst surrounds 

 the opesium and is deep, concave, smooth. The opesium is large, 

 oval, very finely denticulated, with a proximal border a little con- 

 cave or slightly convex. The ovicell is endozooecial. The onycho 

 cellarium is elliptical, very elongated, a little longer than a zooecium; 

 its beak is rounded and its opesium is median and elliptical. 



Measurements. — 



Opesium of jho = 0.30-0.35 mm. y . [is = 0.60 mm. 



zooecium [lo = 0.25-0.30 mm. ecia [?2 = 0.40-0.50 mm. 



Opesium of ony.j7io = 0.30-0.35 mm. Onycho- fZ<m = 0.60-0.90 mm. 

 chocellaria IZo = 0.15 mm. cellaria \lon = 0.35 mm. 



Affinities. — When the proximal border of the opesium is convex the 

 opesiular indentations are somewhat visible. Tho opesium is almost 

 orbicular in the broad zooecia. The onychocellarium is always 

 primoserial but all the primoserial zooecia are not ony chocellaria. 

 Our specimens were dead. 



