476 BULLETIN 100, UNITED STATES NATIONAL MUSEUM 



Genotype. — Anoteropora magnicapitata Canu and Bassler, 1927. 



Range. — Pliocene, Recent. 



The species belonging to this genus are as follows: 



Anoteropora (Stichoporina) simplex Kirkpatrick, 1890 China Sea. 



Anoteropora magnicapitata Canu and Bassler, 1927 Philippines. 



Anoteropora (Stichoporina) persimplex Neviani, 1895 Pliocene. 



Anoteropora (Mamillopora) smitti Calvet, 1907 Atlantic (Cape Verde 



Island) . 



ANOTEROPORA MAGNICAPITATA Canu and Bassler, 1927 



Plate 65, figs. 1-4; plate 94, figs. L-N 



1927. Anoteropora magnicapitata Canu and Bassler, Classification Cheilostoma- 

 tous Bryozoa, Proc. U. S. Nat. Mus., vol. 69, Art. 14, p. 10, pi. 1, fig. 11. 



Description. — The zoarium is free, discoidal, convex, and can be as 

 much as 12 millimeters in diameter. The 

 zooecia are distinct, separated by a deep fur- 

 row, somewhat elongated, elliptical; the frontal 

 is convex, arranged distally, and bears a large 

 transverse triangular avicularium with pivot. 

 The aperture is large, a little transverse, 

 Fig. 203.— Anoteropora arranged proximally and ornamented with 



ynagriicapitata Canu two triangular cardelles. The ovicell is very 



0- n( ercu1um le x85 1927 lar9e > n yP erstomial > embedded in the adjacent 

 zooecium, closed by the operculum. The in- 

 ferior face of the colony bears the bases of the zooecia; they are 

 hexagonal, convex, covered with large pseudopores. 



Measurements. — 



. J7w* = 0.23mm. v . \Lz = 0.60-0.65 mm. 



Aperture( k = () 25 _ Q 27 mm Z°°^ U2 = .50-0.55 mm 



Affinities. — The exterior dimensions are rather variable and de- 

 pend on the convexity of the zoarium. The operculum is large, 

 fragile, a little transverse, with a proximal concave border; the two 

 muscular attachments are long and placed close to the edge. 



This species differs from Stichoporina simplex Kirkpatrick, 1891, 

 in the much larger ovicells and in the apertures and opercula of 

 different forms. The aperture of the ovicelled zooecia is much 

 larger (0.30-0.35 mm.) than that of the adjacent zooecia. The 

 pores of the inferior face are simple cavities without depth. 



Biology. — Many of our specimens were dead. The species was 

 certainly in reproduction February 15, 1908. Our single complete 

 colony was dredged at Sulade. 



The species can descend to great depths (415 meters) but it is 

 much more abundant in shallow depths from 36-54 meters. Its 

 geographic distribution is rather small and it is restricted to the 

 Sulu Archipelago. 



