56 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 76 



fascicles are not as wide and the oeciostome is larger. We consider 

 them provisionally as a new variety, tenuis. 



A-ffinities. — Tubulipora liliacea Harmer, 1898, is a species of the 

 northern part of the temperate zone and does not appear to descend 

 as far as the Gulf of Gascogny. It is there replaced in the Atlantic 

 and in the Mediterranean by Tubulipora tuhulifera Lamouroux, 

 1821, which is a species more slender and less vigorous. As it has 

 been confused with Tubulipora serpens Linnaeus, 1758, we give a 

 new description. 



In his synonymy of Tubulipora liliacea Pallas, 1756, Harmer adds 

 Tubulipora serpens Busk, 1875, Smitt, 1867, and Hincks, 1880. It 

 is difficult for us to accept this conclusion, as Busk's figure of 1875, 

 in its micrometric measurements, indicates more the Mediterranean 

 species. The figures of Smitt, 1867, and of Hincks, 1880, indicate a 

 different species cli^racterized by a more linear zoarial form and 

 especially by a greater internal separation of the fascicles, because 

 this varies from 0.40 mm. to 0.60 mm. Moreover*, there are never 

 more than four tubes to the fascicle. In order not to change the 

 nomenclature perhaps it would be well to consider this third species 

 as the true Tubulipora serpens Linnaeus, 1758. We have not been 

 able to secure a sufficient number of specimens for an exact study, 

 but it is certain that our photographs do not have any relationship 

 with those published by Hincks, Busk, and Smitt. 



Biology. — All our specimens of Tubulipora liliacea (Pallas) Har- 

 mer, incrust shells. A single specimen from Wissant (Pas-de- 

 Calais, France) incrusts a Sertularia. This is then not a floating 

 species like the Mediterranean species and the species of Smitt- 

 Hincks. Finally, observed on a solid substratum, it furnishes good 

 bathymetric indications. 



Occurrence. — Galapagos Islands, D. 2815. 



Plesiotypes.—C^t. No. 8530, U.S.N.M. 



Family LICHENOPORIDAE Smitt, 1866 



Genus LICHENOPORA Defrance, 1823 



LICHENOPORA RADIATA Savigny-Audonin. 1826 



1923. Lichenopora radiata Canu and Basslkr, North American Later Tertiary 

 and Quaternary Bryozoa, p. 204, pi. 44, fig. 10. (Bibliograpliy, geo- 

 logic and geographic distribution.) 



We have found only a single dead specimen. It is free and very 

 well preserved. 



Biology. — This species is another evidence of the ancient commu- 

 nication between the Atlantic and the Pacific, for we have discovered 

 it also in the Gulf of Mexico and in the Philippines. 



