10 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.61. 



Genotype. — Atractosoecia (Berenicea) edwardsi Canu, 1913. 

 Bathonian. In 1920 we classed the genotype in Macroecia, but the 

 discovery of a new species having an identical ovicell made it advis- 

 able to create this new genus in which the form of the ovicell is very 

 constant and different from that of Macroecia lamellosa Michelin, 

 1846. 



ATRACTOSOECIA WALFORDIANA, new species. 



Plate 4, fig. 8. 



Description. — The zoarium encrusts shells forming expansions of 

 some width. The tubes are distinct, separated by a furrow, some- 

 what convex, cylindrical ; the peristomes are salient, thin, orbicular, 

 arranged in quincunx. The ovicell is very long, fusiform, smooth; 

 the oeciostome is terminal, salient, elliptical, transverse, a little larger 

 than an ordinary peristome. 



Diameter of peristome 0.12 mm. 



Diameter of orifice . 09 mm. 



Distance of tubes . 50 mm. 



Separation of tubes . 40 mm. 



Length of ovicell 1.20 mm. 



Width of ovicell . 40 mm. 



Measurements.- 



Affinities. — This fine species is named in honor of Mr. Edwin A. 

 "Walford, of Banbury, England, in appreciation of his excellent stud- 

 ies upon the Jurassic faunas. It differs from Atractosoecia edwardsi 

 Canu, 1913, in its smaller micrometric dimensions and in the rela- 

 tively more elongated ovicell. 



Occurrence. — Jurassic (Bathonian) : Shipton Gorge, Dorset, Eng- 

 land. 



Holotype.~Cat. No. 68901, U.S.N.M. 



ATRACTOSOECIA EDWARDSI Cann. 1913. 



Plate 4; fig. 7. 



1913. Berenicea edtvardsi Canu, Contributions a I'^tude des Bryozoaires 

 fossiles, XIII, Bulletin Soci§t6 Geologique de France, ser. 4, vol. 13, 

 p. 270 (bibliography and geologic distribution). 



This species has been confused for a long time with Trigonoecia 

 {Berenicea) diluviana Lamouroux, 1821, but Canu in 1913 revised 

 the bibliography of the two species. Although the ovicell was known 

 since 1852, for D'Orbigny figured it, we believe it useful to give a 

 new photograph for comparative purposes. The ovicell is very long, 

 sack shaped, oval, very narrow at the base, convex, transversely 

 striated. The oeciostome is orbicular, salient, much larger than an 



