BRYOZOA OF THE PHILIPPINE REGION 101 



Genus CALLOPORA Gray, 1848 



Harmer, 1926, formed the genus Copidozoum for the tenuirostris 

 group of the genus CaUopora. We are not able to recognize this genus. 

 When a genus is very important and contains numerous species, 

 certain ones among them resemble each other in the secondary char- 

 acters and form groups more or less distinct. It is not necessary to 

 make a new genus of such groups if the essential characters remain 

 the same. This is the case in CaUopora for the form and size of the 

 avicularia are the only characters which differentiate the tenuirostris 

 group from other species and these characters do not correspond at 

 all to important or even known biologic functions. 



Harmer compares Copidozoum to Crassimarginaiella (Grammella), 

 but the difference between the two genera is considerable. In 

 , Crassimarginatella the operculum closes the ovicell and the avicularia 

 are sporadic and zoarial. In CaUopora the operculum does not close 

 the ovicell, the avicularia are constant and zooecial, and their function 

 is totally different. 



Membranipora permunita Hincks, 1881, has not been sufficiently 

 studied to be correctly classified. 



CALLOPORA SUBALBIDA, new name 



Plate 7, fig. 5 



1885. Membranipora albida Busk (part), Zoology Challenger Expedition, vol. 



30, p. 63, pi. 15, fig. 4 (var. fide Waters). 

 1898. Membranipora curvirostris var. Waters, On Membraniporidae, Linnean 



Society Journal, Zoology, vol. 26, pi. 47, fig. 12. 



Measurements. — 



r. • iho — 0.34 mm. -v • 1X2 = 0.44 mm. 



(Jpesium , Zooecium ., 



IZo = 0.22mm. Us = 0.26 mm. 



Affinities. — Hincks, 1890, did not believe that Busk's species of 

 1884 was the Membranipora albida Hincks, 1881, from Singapore in 

 which the ovicell is small and shallow. The difference from Mem- 

 branipora curvirostris Hincks, 1861, is too great to consider the present 

 species as a simple variety as noted by Waters, 1898. We, therefore, 

 propose the name subalbida to recall its affinities. 



CaUopora subalbida differs from C. curvirostris Hincks, 1861, in its 

 smaller dimensions and in its smaller and less curved avicularium. It 

 differs from C. albida Hincks, 1881, in its globular, salient ovicell. 



The avicularium is placed in a heterozooecium as in the two species 

 compared. This character not appearing in the genus Ellisina 

 2182—29 8 



