98 BUULETIN 125, UNITED STATES NATIONAL, MUSEUM. 



(7ia = 0.25mm. „ • fZ2 = 0.95 mm. 



i/easurejnente.-Apertura |^^ ^ ^ 25 mm. ^''"^"^ \h = 0.55-0.60 mm. 



Affinities. — ^This species is very close to the genotype Dakaria chevreuzi Jullien, 

 1904, but it differs in the absence of salient threads between the zooecia, which are 

 also more elongated and especially in the larger micrometric dimensions (Z2 = 0.75 

 mm.) . 



Occurrence. — Miocene (Yorktown formation): Yorktown, Virginia (rare). 



Holotype.— Cut. No. 68540, U.S.N.M. 



DAKARIA TOKQUATA D'Orbigny, 1839. 



Plate 12, figa. 8, 9. 



1839. Escharina torquala D'Orbiony, Voyage dans rAmerique-Meridionale, vol. 5, pt. 4, Zoo- 



phytea, p. 11, pi. 4, figs. 1-4. 

 1845. Escharina iumidula Lonsdale, Report on the Corals from the Tertiary formations of North 



America, Quarterly Journal Geological Society, London, vol. 1, p. 502. (Not Flustra 



torquata LamouTOu-x, 1827, Encyclopedie M^thodique, vol. 14, p. 407.) 

 1851. Cellepora subtorquata D'Orbiony, Paleontologie francaise, Terrain Cretace, vol. 5, Bryo- 



zoaires, p. 399. 

 1905. Cellepora subtorquata Waters, Notes on some Recent Bryozoa in D'Orbigny's Collection, 



Annals Magazine Natural History, ser. 7, vol. 15, p. 6. 



,, . A i fAa = 0.15mm. „ . fL2 = 0.50mm. 



Measurements. — Apertura , „,_ Zooecia , _ .„ 



^ lZa = 0.15mm. |(2 = 0.40mm. 



Affinities. — -In 1851 D'Orbigny having noted that his Escharina torquata was 

 not Flustra torquata Lamouroux, 1827, changed its name. Examining the type of 

 the species Waters, 1905, wrote "D'Orbigny's figure is good, but the lateral wings 

 by the side of .the sinus project more than is figured." In 1884 Hincks believed he 

 had found D'Orbigny's species in the Pacific off California, but his good figure would 

 not really permit this identification; the primitive name of Schizoporella dawsoni 

 Hincks, 1883, applied by him to this species must therefore be preserved. The 

 description and figure of Lonsdale leaves no doubt; we have indeed rediscovered 

 his Escharina tumidula and in the same locality, namely, Petersburg, Virginia. 

 D'Orbigny's figure of the species is much better than that of Lonsdale. This 

 species differs from Schizobrachiella sanguinea Norman, 1868, and Dalcaria cJiev- 

 reuxi Jullien, 1903, in a larger rimule and in the smaller micrometric dimensions. 

 It incrusts shells and has no dietellae. 



Occurrence. — Miocene (Yorktown formation) : 3 miles southwest of Petersburg 

 (rare) and 2 miles southwest of Cash, Gloucester County, Virginia (rare) . 



Hahitat.—Atl&ntic: Bay of Rio de Janeiro, Brazil. 



Plesiotypes.—Csit. No. 68541, U.S.N.M. 



DAKARIA PARVIPOROSA, new species. 

 Plate 30, fig. 1. 



Description.— The zoarium incrusts oysters. The zooecia are distinct, long, 

 separated by a furrow; the frontal is convex and formed by a tremocyst with very 

 small pores. The apertura is large, orbicular with a very wide rimule of little depth. 



Measurements. — Apertura , „ 'i ^ "^ ' Zooecia 



lto = 0.16 mm. 



L2= 0.50-0.60 mm. 

 Z2 = 0.36-0.40 mm. 



