Measurements. 



696 BULLETIN 106, UNITED STATES NATIONAL MUSEUM. 



but it differs from it in its very acute bifurcations and in a smaller distance between 

 the peristomes (0.80 and not 1.00 mm.). 



Occurrence. Vicksburgian (Red Bluff clay) : Seven and one-half miles south- 

 west from Bladen Springs, Alabama (common). 



Cotypes.G&i. No. 65408, U.S.N.M. 



FILISPARSA TYPICA Manzoni, 1877. 



Plate 159 figs. 12-18. 



1821. Horn-era opuntia DEFKANCE, Dictionnaire des Sciences naturalles, vol. 21, p. 432. 

 1877. Filisparsa typica MANZONI, I Briozoi fossili del Miocene d'Austria ed Ungheria, 



Denkscbriften der rnathenifitiscbe-nnturwissenscbaften Klasse der k. Akademie 



der Wissenschaften, Wien, pt. 3, vol. 38, p. 10, pi. 8, fig. 30. 

 1895. Tubulipora (Filisparsa) typica NEVIANI, Briozoi fossili della Famesina e Monte 



Mario presso Roma, Palaeontographia Italica, vol. 1, p. 132 (56). 

 1909. Filisparsa typic, CANU, Bryozoaires tertiaires des environs de Paris, Annales de 



Paleontologie, vol. 4, p. 115, pi. 14, figs. 25, 26. 

 1913. FiUspama typica CANTJ, Contributions a I'e'tude des Bryozoaires fossiles, Bulletin 



de la Societg Geologique de France, ser. 4, vol. 13, p. 127. 



Diameter of the peristome 0.20 mm. 



Distance between the peristomes 0.60-74 mm. 



Distance between the transverse rows 0.50 mm. 



Separation of the peristomes 0.56-0.60 mm. 



Variations. Usually the peristomes are grouped in transverse rows to the 

 number of three to six; they are not adjacent when the peristomie is developed. 

 This peristomie is rather short, moreover, and where it is a little reduced the 

 peristomes are adjacent and the tubes show as pseudo fascicles, whose separation is 

 0.50 mm. The peristomes arranged in quincunx are a little more widely spaced, 

 their distances being from 0.60 to 0.74 mm. ; this arrangement is always very 

 irregular. The zone of growth is large and triangular. 



There are in the Canu collection more than 200 specimens of this species from 

 the faluns of Touraine, none of which shows an ovicell. However, according to 

 certain indications, it is possible that the ovicell, if it exists, is of the type of 

 Diaperoecia. It is also possible that in this and similar species the larva is devel- 

 oped in an ordinary tube in the vicinity of the tentacular sheath. 



Occurrence. Vicksburgian (Marianna limestone) : Salt Mountain. 5 miles 

 south of Jackson, Alabama, (rare) ; west bank of Conecuh River, Escambia County, 

 Alabama (very common) ; deep well, Escambia County, Alabama (very rare) ; 

 near Claiborne, Monroe County. Alabama (rare) ; Murder Creek, east of Castle- 

 bury, Conecuh County, Alabama (common). 



Vicksburgian (Red Bluff clay) : Seven and one-half miles southwest from 

 Bladen Springs, Alabama (very rare). 



Geologic distribution. Lutetian of the Paris Basin (Canu) ; Burdigalian of 

 Gard (Canu); Helvetian of Touraine (Canu) and of the Rhone valley (Canu); 

 Tortonian of Austria-Hungary (Manzoni) ; Sicilian of Italy (Neviani). 



Plcsiotypes.Cnt. Nos. 65485, 65409, U.S.N.M. 



