62 s THE HAMILTON ASSOCIATION. 



Professor G. B. Simpson, who made the Bryozoa a special study, 

 and who is considered the best authority on that class, includes one 

 or more species oi Monticulipora, adding, however, " Although in this 

 work they have been placed with the Bryozoa, undoubtedly further 

 study and investigation will show that some of the forms at least 

 must be associated with the corals." Lindstrom, Rominger, and 

 other Palaeontologists favor classification with the Falyzoa, the 

 former pointing out that certain of the Monticuliperoids pass through 

 early stages of development of a distinctly Bryozoan type. But he 

 may be mistaken, remarks Simpson, for reasons he assigns which we 

 need not follow. It seems clear enough the matter remains unset- 

 tled, but it may remind us of what Billings asserted many years ago, 

 viz., that many early organisms appear to have combined in them- 

 selves quite distinct features. The writer cannot find in any of the 

 works he consulted the occurrence recorded in Canadian Niagaras 

 of two Gasteropods recently obtained from the glaciated chert beds, 

 viz., Platyceras {Acrocuka) Niagarense — Hall (which has been 

 determined also by our chairman, Mr. A, E. Walker,) and Platyceras 

 {Acrocuka) Angulatm?i — Hall. The latter is merely an internal cast 

 or filling of the shell, but we can add both to the list of Niagara 

 fossils from local works. Another Gaskropod may be a new species ; 

 but unfortunately it is partly concealed and the aperture absent — 

 broken off. It is better to preserve fossils in this condition when 

 they admit of no determination. We cannot tell, but a missing part 

 may turn up at any time quite unexpectedly. The glaciated chert 

 beds presented since our report last published a few specimens of 

 the Crania family group, which we felt inclined to consider may 

 prove to be new to science. However, Professor Schuchert states : 

 " This Brachiopod assumes not only the form, but nearly in all 

 cases it partakes more or less of the ornamentation of its host." If 

 such be the case — personally the writer is quite satisfied as to its 

 correctness, — we may well hesitate to distinguish one species from 

 another, unless they present themselves, as in tbe chert beds here, 

 undisturbed. I have to submit also for the inspection of the Section 

 a few species of Annalids. They are not found attached to foreign 

 bodies here, as is often the case. The calcareous tubes have been 

 replaced by chert. I don't know whether some have ever been 

 described. The forms differ from ones figured by the late Dr. Jas. 

 Hall. 



