BRYOZOA OF THE PHILIPPINE REGION 159 



furrow, very elongated, clavulate; the frontal is convex, perforated 



with tremopores, covered by a thick ectocyst and impregnated with 



calcite; in front of the proximal border of the apertura there is a wide 



umbo, hollow, little salient, containing a pair of glands. The apertura 



is transverse, ogival, with two minute cardelles placed very low. The 



ovicell is very large, globular, buried in the distal zooecium, closed by 



the operculum, punctated. 



Measurements. — 



. fk = 0.15 mm. „ . (L2 = 0.80mm. 



Apertura] ^ 2Q ^ Zooeciaj lz = . Z0 _ 0A0 mm 



Structure. — We have found many kinds of opercula and we do not 

 know to what the light colored, thick, elliptical opercula without 



A B 



C 



Fig. 40. — Monoporella (?) ivaipukerensis Waters, 1887 



A. The simple elliptical type of operculum, X85. B. Usual form of oper- 

 culum, X85. C. Operculum showing position above glandular umbo, X85. 

 D. Monoporella fimbriata Canu and Bassler, 1927. Operculum, X85. 



accessories can correspond. The others with peripheral sclerite of 

 varied and complex structure, correspond to the opercula visible on 

 our figure. 



The frontal is formed by a thin tremocyst. The tremopores are 

 buried in the thick ectocyst and are not visible on the living speci- 

 mens. 



The broken umbo revealed a small yellow body which seemed to us 

 to be a glandular apparatus. Now that Harmer has fixed the true 

 limits of Monoporella it is evident that this species is not correctly 

 placed. 



Our species may not be exactly the species of Waters, but by in- 

 spection of the figures they are certainly very close. The three speci- 

 mens collected have not permitted a detailed study. 



Occurrence.— D. 4807. Cape Tsiuka, Sea of Japan; 41° 36' 12" N.; 

 140° 36' E.; Tertiary of New Zealand (Waters). 



Plesiotype.—C&t. No. 8091, U.S.N.M. 



Genus MACROPORA MacGillivray, 1895 



Levinsen, 1909 states that there is no ovicell in this genus, but two 

 species however have them. In Macropora crassatina Waters, 1882, 

 the ovicell is "very large much raised both broader and longer than 

 the length or width of a zooecium." (Waters). In Macropora 



