PLATE IV. a 
Vinella! multiradiata Ulrich and Bassler. (Page 13.) 
Fig. 1. Part of a colony attached to a crinoid column, exhibiting many nuclei and the 
intertwining of the numerous radiating stolons, X 9. 
Rochester shale, Lockport, N. Y. 
Vinella radiciformis (Vine). (Page 12.) 
2. Portion of the creeping network of the typical form of this species, X 9, showing 
several nuclei. 
Rochester shale, Lockport, N. Y. 
3. A nucleus of another colony, X 20, showing a few scattered pores along the radii. 
Rochester shale, Rochester, N. Y. 
Rhopalonaria aitenuata Ulrich and Bassler. (Page 11.) 
4. Part of a colony preserved as an excavated mold, with several branches growing 
so as to intersect each other, thus causing an apparent irregularity in the 
growth. 
5. Portion of another colony preserved as an excavated mold on a gastropod, show- 
ing a more regular arrangement of the zocecia. Both ligures illustrate the 
extreme tenuity of the connecting stolons and the very slight swelling of the 
zooecial part. 
Rochester shale, Lockport, N. Y. 
Ascodictyon siluriense Vine. (Page 14.) 
6. Two isolated clusters of vesicles, X 9, attached to a fragment of Leptxna rhom- 
boidalis. 
7. A group of clusters, X 9. 
Rochester shale, Lockport, N. Y. 
8. A single cluster, magnified, figured by Vine (Quart. -lour. Geol. Soc. London, 
XXXVIII, 1882, p. 52, lig. 1 ). 
Wenlock shales, Shropshire, England. 
Allonema ira/dronense Ulrich and Bassler. (Page 13.) 
9. Portion of a colony attached to the dorsal valve of an orthoid. 
Waldron shale, Waldron, End. 
Stomatopora elongata (Vine). (Page 14.) 
10. Three zooecia, X 12, of a specimen identified by Mr. Vine. 
11. Portion of a zoarium magnified. (After Vine.) 
Wenlock shales, Shropshire, England. 
12, 13. Portions of two zoaria, X 12, showing variation ingrowth and shape of z.ocecia 
14. A specimen, X 0, introduced for comparison with figure 19. 
Rochester shale, Rochester, N. Y. 
Stomatopora dissimilis Vine. (Page 15.) 
15. A reduced sketch of one of Vine's figures of this species. 
Wenlock shales, England. 
16. Zocecia, X 12, exhibiting transverse annulations and flexuous growth. 
17, 18. A portion of a colony, X 6, and parts of four zooecia of same, X 12. 
19. Another colony, X 6. 
Rochester shale, Lockport, N. Y. 
" Fip;s. i , 2, 4, 5, 6, and 9 are copied from Ulrich and Bassler, Revision of American Paleozoic Hryozoa 
Ctenostomata; Smithsonian Miscellaneous Collections (Quart, issue), XLV, 1904. 
72 
