ulrich-bassler] revision of paleozoic bryozoa 273 



ters not found in the Viiicllidcc, namely, two permanently and widely 

 distinct structures — bulbous vesicles and extremely delicate connect- 

 ing stolons. If the simple or segmented threads of the VincUidco 

 are, as we believe, homologous with the vesicles of Ascodictyon, then 

 the connecting stolons of the latter are wanting in this family. If, 

 on the other hand, they represent the stolons, then there is nothing 

 to compare with the vesicles. 



Genus Vinella Ulrich 



1890. Vinella Ulrich, Jour. Cincinnati Soc. Nat. Hist., xii, p. 173. 



1892. Vinella Miller, North Amer. Geol. and Pal., First app., p. 685. 



1892. Vinella Vine, Proc. Yorkshire Geol. & Polyt. Soc, xii, p. 84. 



1893. Vinella Ulrich, Geol. Minnesota, iii, p. 112. 



1897. Vinella Simpson, Fourteenth Ann. Rep. State Geol. N. Y. for 1894, 



p. 604. 

 1900. Vinella Nickles and Bassler, Bull. U. S. Geol. Surv., No. 173, 

 p. 19. 



Zoarium parasitic, consisting of very slender, tubular threads or 

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

 face of threads with a single row of small pores. These may be want- 

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

 Zooecia unknown, probably deciduous. 



Genotype. — V . repens Ulrich. 



Of the following species only the genotype and V. radiciforiiiis 

 (Vine), together with its variety conferta Ulrich, are confidently re- 

 ferred to this genus. As to Nicholson and Etheridge's Ascodictyon 

 radians, from the Carboniferous of Scotland, we are satisfied that it 

 is not an Ascodictyon and equally confident that it is nearer to Vinella 

 than it is to the typical forms of the genus in which it has hitherto 

 been placed. Still, the considerable thickness of the inner parts of 

 the radii and the root-like taper of their distal halves give the 

 organism an aspect that certainly looks diflierent from the more 

 typical species of Vinella. Excepting, of known characters, that its 

 radii maintain approximately the same diameter {i. e., they do not 

 taper), our new species V.? mnltiradiata, may be said to parallel the 

 Carboniferous species. Both have a central cup, with a raised bor- 

 der that possibly represents the broken base of an erect zooecium 

 like those in the recent Cylindroecium dilatatuni Hincks (see plate 

 Lxv, 3). The only known example of V.f mnltiradiata, unfortu- 

 nately, has suffered enough from weathering to obliterate whatever 

 minute structure it may have possessed, so we are unable to decide 

 as to its true affinities. The species radians, however, is said to 

 occur abundantly and, apparently in a state of preservation sufficiently 



