522 BULLETIN 100, UNITED STATES NATIONAL MUSEUM 



ENTALOPHORA DELICATULA Busk, 1875 



Plate 77, figs. 6, 7 



1875. Pustulopora delicatula Busk, Catalogue of the Cyclostomatous Polyzoa 

 in the British Museum, p. 21, pi. 6B. fig. 3. 



Measurements. — Diameter of orifice, 0.10 mm.; diameter of peri- 

 stome, 0.14; diameter of tubes, 0.16-0.18; distance of orifices, 1-10 

 to 2.00; and diameters of branches, 0.50. 



Affinities. — Our photograph differs from Busk's figure only in the 

 slightly less length of the peristomie. All the remaining features are 

 identical. Harmer, 1915, has introduced into synonymy with this 

 species Entalophora deflexa Smitt, 1872, and Entalophora wasinensis 

 Waters, 1914. This is quite possible, but we have not enough material 

 to discuss the subject. However, the measurements indicated by 

 Harmer are smaller than ours and we can not compare our figures 

 with his. 



Ortmann 17 gave a figure of a specimen from the Sea of Japan which 

 is very different from ours and from those of Busk; it is, moreover, 

 very difficult to understand on account of the slight enlargement 

 ( X 5) employed by this author. 



Occurrence— D. 5137. Jolo Light, Jolo; 6° 04' 25" N.; 120° 58' 

 30" E.; 20 fathoms; S. Sh. 



Plesiotypes — Cat. No. 8334, U.S.N.M. 



Family THEONOIDAE Busk 



Genus ACTINOPORA D'Orbigny, 1853 



ACTINOPORA JAPONICA, new species 



Plate 77, fig. 4 



Description. — The zoarium is free and discoid or bilamellar and 

 flabelliform. The tubes are arranged in radiating fascicles, little 

 salient, to the number of thirty. The interfascicular spaces are wide 

 and wrinkled concentrically. 



Measurements. — Width of fascicles, 0.12 mm., and diameter of 

 zoarium, 4. 



Affinities. — The free specimens of Actinopora are sometimes flabelli- 

 form and bilamellar; the colony appears as folded upon itself. This 

 phenomenon oftentimes observed in the fossils has still not been 

 studied and explained. 



This species is very well characterized by its wide ai}d wrinkled 

 interfascicular spaces. 



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

 140° 36' E. 



Holotype— Cut. No. 8335, U.S.N.M. 



"1889, Entalophora delicatula Ortmann, Die japanische Bryozoen-Fauna, Archiv fur Naturgeschichte 

 vol. 50, p. 61, pi. 4, fig. 28. 



