2/6 SMITHSONIAN MISCELLANEOUS COLLECTIONS [vOL. 45 



Occurrence. — Waldron shale, Waldron, Indiana. 

 Cat. No. 43,147. U- S. N. M. 



VINELLA? MULTIRADIATA new species 

 (Plate LXVIII, 8) 



The specimen on which this pecuHar species is founded incrusts 

 a crinoid column, about three-fourths of an inch in length, about two- 

 thirds covered with the supposed Vinella. At intervals varying from 

 little more than 0.5 mm. to about 2.0 mm. the surface of the incrust- 

 ing sheet presents subcircular, cup-shaped depressions, 0.12 mm. to 

 0.2 mm. in diameter, enclosed by a low rim from which 14 to 20 

 closely arranged threads proceed in all directions. The radii are 

 commonly disposed in sets of three to five, those emanating from 

 neighboring centers overlapping and interweaving in the interspaces. 

 The sheet seems to consist in most parts of at least two superposed 

 layers. Minute details of structure not preserved. 



At first sight, under a low power of magnification, the specimen 

 recalled the attached basal disks of articulating Bryozoa like 

 Arthropora and Escliaropora, but it soon became evident that the re- 

 semblance was deceptive and extended only to the common possession 

 of cup-shaped depressions and lines radiating from them. Under a 

 higher power the radii proved to be simple threads and not radially 

 arranged walls separating rows of elongated zooecial apertures, which 

 is the structure of the attached disks of the articulating Bryozoa 

 referred to. Of course the much smaller size of the Vinella was 

 apparent from the beginning of our investigations. Though now 

 thoroughly satisfied that we are not dealing with bases of zoaria, we 

 think it quite possible that they may prove to be the bases of isolated 

 zocecia. Whatever the future may prove it to be, it impresses us as a 

 very interesting organism, and it is the hope that other collectors may 

 succeed in finding more and better specimens that has induced us to 

 describe it. 



Occurrence. — Rochester shale, Lockport, New York. 



Cat. No. 43,144, U. S. N. M. 



VINELLA? RADIANS (Nicholson and Etheridge, Jr.) 

 (Plate LXV, g, 10) 

 1877. Ascodictyon radians Nicholson and Etheridge, Jr., Ann. & Mag. 



Nat. Hist, sen 4, xix, p. 465, pi. 19, figs. 9-1 1. 

 1887. Ascodictyon radians Vine, Proc. Yorkshire Geol. & Polyt. Soc, 



IX, p. 184. 

 1892. Ascodictyon radians Vine, Ibid., xii, p. 90. 

 Not Ascodictyon radians ? Vine, 1S81 (^^ Vinella radiciformis (Vine)). 



