121 
Eridotrypa spinosa n. sp. (Pago 29.) 
[See also PI. XII, figs. 1-3.] 
'ig. 15. A fragment, X 2, showing the larger size of the branch and zooecia distinguishing 
the species from E. striata. 
Rochester shale, Rochester, N. Y. 
Eridotrypa solida (Hall). (Page 30.) 
[See also PI. XII, figs. 7-9; PI. XXIV, figs. 20-23.] 
16. Portion of a zoarium, X 2. 
Rochester shale, Lockport, N. Y. 
Acanlhoclema asperum (Hall). (Page 58.) 
[Sec also PI. XXI, figs. 3-5; PI. XXIV, figs. 7-9.] 
17-20. Four fragments, X 2, illustrating the usual characters of specimens found in 
washings. 
Rochester shale, Lockport, N. Y. 
Rhombotrypa spinulifera n. sp. (Page 37.) 
[See also PI. X, figs. 13-10.] 
21 . Portion of a zoarium, X 2, illustrating the usual shape of the fragments found. 
Rochester shale, Rochester, N. Y. 
LoculijKira ulrichi n. sp. (Page 53.) 
[See also PI. XXI, fig. 2.] 
22-24. Three fragments of the basal portions of zoaria, X 2. 
Rochester shale, Grimsby, Ontario. 
