32 BULLETIN 125, UKITED STATES NATIONAL MUSEUM. 



There are some long and some wide zooecia. The opesium is very finely den- 

 ticulated and bears areal spines. The mural rim is granulated on the better pre- 

 served specimens, wliich then resemble forma monilifera from Cercado de Mao, Santo 

 Domingo. There are in the Canu collection specimens almost as beautiful as the 

 Santo Domingo form. 



Occurrence. — Miocene (Aquitanian) : Leognan (LeThil), St. Medard-Gajac 

 (Gironde) and St. Avit (Landes), France. Miocene (Burdigalian) : Saucats (Le- 

 Peloua), L6ognan and Pontiac (Gironde) France. 



ACANTHODESU SAVARTI forma MONILIFERA Canu and Bassler, 1919. 



Plate 2, figs. 2, 3. 



1919. Acanthodesia savarti forma monilifera Canu and Bassler, Geology and Paleontology of the 

 West Indies, Bryozoa, Publication of the Carnegie Institution of Washington, No. 291, p. 79, 

 pi. 2, figs. 2, 3. 



Like typica, but the mural rim is beaded. The zoarium is unilamellar and sub- 

 cylindrical. 



This form is intermediate between forma reyti and forma typica. It is evi- 

 dently the first representative in the American Basin. 



Occurrence. — Lower Miocene (Bowden horizon) : Cercado de Mao, Santo Do- 

 mingo (rare.) 



Holotype.—C&t. No. 68427, U.S.N.M., 



ACANTHODESIA SAVARTI forma TEXTURATA Reuss, 1847. 

 Plate 5, figs. 1-5; plate 46, figs. 8, 9. 



1847. Fluitrellaria texturata Reuss, Die fossilen Polyparien des Wiener-Tertiarbeckens, Haidinger's 



naturwissenschaftliche .\bhandlungen, vol. 2, p. 73, pi. 9, fig. 1. 

 1872. Biflustra savarti Smitt, Floridan Bryozoa, collected by Count L. F. de Pourtales, Part I, 



Kongl. Svenska Vetenskaps-Akademiens Handlingar, vol. 10, No. 11, p. 20, pi. 4, figs. 



92-95. 

 1877. Flustrellaria texturata JUnzoni, I, Briozoi fossili del Mocene d'Austria ed Ungheria, II Parte, 



Denkschriften der math, natur. Classe der k. Akademie der Wissenschaften, vol. 37, Abtheil. 



2, p. 67, pi. 13, fig. 45. 

 1917. Acanthodesia savarti forma texturata Canu and Basslee, Geology and Paleontology of the West 



Indies, Bryozoa, Publication of the Carnegie Institution of Washington, No. 291, p. 79, pi. 



5, figs. 1-5. 



The cryptocyst is developed on all the zooecia. No spinous processes. No 

 tubercles. The zoarium is unilamellar and subcylindrical. 



Measurements.-Opesmt = If^ °™- Zooecia!^" = J" JJ °^°^- 



^ [<o = 0.20mm. U2 = 0.28mm. 



Variations. — The zoarium incrusts fine algae at their bifurcation; it is therefore 

 unilamellar and subcylindrical. The zooecia are elongated, ogival, distinct; the 

 mural rim is striated, salient only in the distal portion; the cryptocyst is large and 

 concave. The opesium is eUiptical, very finely denticulated; anteriorly it often 

 bears thin and short spinous processes. 



Smitt figured the serrate denticle on the recent specimens; it never persists on 

 the fossil examples. On the inner face the zooecia are rectangular. 



