BRYOZOA OF THE PHILIPPINE REGION 277 



Measurements. — 



Aperture!^ = - 22 mm - Zooeciaf^ 2 =0-75-0.95 mm. 



[la =0.17 mm. [Iz =0.55-0.65 mm. 



Affinities. — This species is very deceiving; the ordinary zooecia have 

 the aspect of Lepralia jeegensis Busk, 1885, but the present form 

 differs in the hyperstomial (and not endozooecial) nature of its ovicell. 

 Waters in 1913 (p. 514) noted MacGillivray's error of determination, 

 an error very excusable however since Busk did not figure the ovicell 

 of his species. 



The operculum in its dimensions, its form and its large lateral 

 bands, is very close to the operculum of Cosciniopsis caelatus but 

 without visible muscular attachments. 



E 



Fia. 113. — A-D. Cosciniopsis fallax, new species 



A. Operculum of ordinary (A) and ovicelled zooecium (B), X85. C, D. Two 

 ordinary opercula showing variation, X85 E Cosciniopsis caelatus, new 

 species. Operculum, X85. 



The arrangement of the avicularia on the ordinary zooecia is also 

 contrary to that of the genotype which bears its avicularia on the 

 ovicelled zooecia. 



Emballoiheca laticapitata Canu and Bassler, 1920, of the Jack- 

 sonian of North Carolina is almost identical. But the recent species 

 differs in its more elongate and more irregular ovicell in its smaller 

 frontal pores and in its still smaller apertural dimensions. 



These two species differ from Ernballotheca quadrata MacGilliv- 

 ray, 1879, a recent species and type of the genus Ernballotheca Levin- 

 sen, 1909, in their two, lower placed and less salient cardelles, in 

 the presence of two constant distal avicularia the points of which 

 converge toward the median zooecial axis, and in a very different 

 operculum. 



2182—29 19 



