EARLY PALEOZOIC BRYOZOA OF THE BALTIC PROVINCES. 55 



Family VINELLID^ Ulrich and Bassler. 



All of the forms referred to this family are fossil and are believed 

 to represent merely the creeping base of the zoarium. This base 

 consists of simple, delicate, partially ramifying, tubular threads, 

 which, in one genus, are arranged without any regular order, in a 

 second proceed from more or less definite centers, and in a third are 

 locally jointed. The second of these, Vinella, is represented in the 

 collections under study by its type species, Vinella repens, while the 

 first is recognized very doubtfully for the reception of a very inter- 

 esting new form, Heteronema priscum. 



Genus VINELLA Ulrich. ' 



Vinella Ulrich, Journ. Cincinnati Soc. Nat. Hist., voL 12, 1890, p. 173. — Miller, 

 North Amer. Geol. and Pal., First App., 1892, p. 685.— Vine, Proc. York- 

 shire Geol. Polyt. Soc, vol. 12, 1892, p. 84.— Ulrich, Geol. Nat. Hist. Surv. 

 Minnesota, vol. 3, pt. 1, 1893, p. 112. — Pocta, Syst. Sil. Centre Boheme, vol. 

 8, pt. 1, 1894, p. 17. — Simpson, Fourteenth Ann. Rep. State Geologist New 

 York for the year 1894, 1897, p. 604.— Nickles and Bassler, Bull. 173, U. S. 

 Geol. Surv., 1900, p. 19 — Ulrich and Bassler, Smiths. Misc. Coll., vol.45, 

 1904, p. 273.— Bassler, Bull. 292, U. S. Geol. Surv., 1906, p. 12. 



Zoarium parasitic, consisting of very slender, tubular threads or 

 stolons, arranged more or less distinctly in a radial manner. Surface 

 of threads with a single row of small pores. These may be wanting 

 locally, and vary considerably in the degree of their separation. 

 Zooecia unknown, probably deciduous. 



Genotype. — Vinella repens Ulrich. Middle Ordovician of America 

 and Europe. 



VINELLA REPENS Ulrich. 



Text fig. 5. 



Vinella repens Ulrich, Journ. Cincinnati Soc. Nat. Hist., vol. 12, 1890, p. 174, 

 fig. 1.— Vine, Proc. Yorkshire Geol. Polyt. Soc, vol. 12, 1892, p. 84, pi. 3, 

 figs. 1-4. — Ulrich, Geol. and Nat. Hist. Surv. Minnesota, vol. 3, pt. 1, 1893, 

 p. 114, pi. 1, figs. 1-5. — Simpson, Fourteenth Ann. Rep. State Geologist New 

 York for the year 1894, 1897, p. 604, fig. 222.— Ulrich and Bassler, Smiths. 

 Misc. Coll., vol. 45, 1904, p. 274, pi. 68, figs. 1-3. 

 Original description. — Zoarium repent, the stolons delicate, thread-like, often longi- 

 tudinally striate, straight or flexuous; from 0.06 to 0.11 mm. in diameter; bifurcating 

 often and sometimes arranged in a radial manner about a central node. Where best 

 preserved, very small pores arranged uniserially along the center of the upper surface 

 of the threads; about 11 in 2.5 mm. Zooecia unknown, probably deciduous. 



Three specimens of this species have been identified in the Kussian 

 collections, one from the Jewe limestone (Dl) incrusting a ramose 

 bryozoan, and two from the Wesenberg limestone (E) growing upon 



1 In the synonymy throughout this work, only those references deemed of importance to the student in 

 the present connection are given. More complete citations can be found in Bull. 173, U. S. Geological 

 Survey. 



