136 PROCEEDI]S[GS OF THE NATIONAL MUSEUM VOL.72 



Biology. — This species was in reproduction from the month of 

 January to the month of May, according to the dredgings of the 

 Albatross. 



Occurrence. — Albatross Station D. 2167, off Habana, Cuba; 23'* 

 10' 40" N.; 82° 20' 30" W.; 201 fms.; coral. 

 Albatross Station D. 2169, off Habana, Cuba; 23° 10' 



28" N.; 82° 21' 27" W.; 78 fms.; coral. 

 Albatross Station D. 2334, north of Cuba; 23° 10' 

 42" N.; 82° 18' 24" W.; 67 fms.; white coral. 

 Holotype.—Csit. No. 7826, U.S.N. M. 



CREPIDACANTHA POISSONH Savigny-Audouin, 1826 



Plate 34, Figure 3 



1826. Flustra poissonii Atjdouin, In Savigny's Description de I'Egypt. 



Histoire Naturelle, vol. 1, p. 10, fig. 5. 

 1880. Lepralia kirchenpmieri var. teres Hincks, Contribution history Marine 



Polyzoa. Annals and Magazine of Natural History, ser. 5, vol. 6, 



p. 77 (sep. 9), pi. 9, fig. 7. 

 1885. Lepralia kirchenpaueri var. teres Hincks, Contribution history Marine 



Polyzoa. Annals and Magazine of Natural History, ser. 5, vol. 15, 



p. 256 (sep. 166). 

 1899. Lepralia poissonii Waters, Bryozoa from Madeira. Journal Royal 



Microscopical Society, p. 16. 

 1909. Lepralia poissonii Norman, The Polyzoa of Madeira. Linnean 



Society's Journal-Zoology, vol. 30, p. 307, pi. 41, figs. 7, 8. Not 



Kirkpatrick, 188S; MacGillivray, 1882; Levinsen, 1909. 



Under the name of Lepralia poissonii, the authors have mani- 

 festly confused many species and it is necessary to rename them. 

 The specific characteristic is furnished by the position of the seti- 

 form avicularia, which are always removed from the aperture and 

 placed much lower. In all the other species they are always placed 

 at the side of the aperture, and if lower, on a level with the proxi- 

 mal border. There is no other synonymy than that which we 

 indicate. 



The specimens from the Red Sea have costulated ovicells; those 

 from Madeira and from the Gulf of Mexico are smooth, without 

 frontal area. 



This interesting species is represented in the Pliocene deposits of 

 Panama by a variation which presents no characters essentially 

 different from the species. 



The two vibracula are not placed symmetrically on the frontal. 



Affinities. — Crepidacantha is a genus of the Tropics and of the south- 

 ern part of the Temperate Zone. Many species are known. They 

 are characterized by their micrometric dimensions and especially by 

 the position of the two oral vibracula. In CrepidacantJia poissonii 



