258 



nature, owing, no doul:)t, to a depression of the continent and conse- 

 quent greater depth of the seas in the Utica times. 



An important fact has been ascertained with regard to the distri- 

 bution of the Ulica at Ottawa, viz., that it occurs on Bank street, just 

 west of the fault, which runs by the " Supreme Court " building. The 

 Utica was further ascertained to occur on Albert street, from the 

 corner of Kent, 175 feet in an easterly direction, having had to be 

 blasted by the men employed in laying drains, etc. From these shales 

 some beautiful specimens were obtained. The rocks here present a 

 striking i-esemblance to those of a similar horizon at such a remote dis- 

 tance as Colling wootl, on the Georgian Bay. The association of the 

 trilobites, mollusks and bivalve shells, and entomostroca is strikingly 

 the same. Lyrodesma 2)ulchellum, Leperditia cyUndrica, Asaphus Cana- 

 densis, Triarthrus becki, Lingula Progne, Leptohohis insignis and Endo- 

 cerus proteiformis, all occ.uri"ing together in same beds both here and 

 at CoUingwood in Western Ontario. Amongst the additions to the list 

 of Utica species may be mentioned a new species of monticuliporid — 

 Batostoma erratica, Ulrich, MSS. ' From beautiful sections of this 

 interesting branching polyzoary prepared by Mr. Weston and from draw- 

 ings excecuted by tlie same gentlemen, together with Mr. Ulrich's 

 authority, the writer has had an opportunity of identifying the species 

 in fpiestion. Pi-of. Ulrich will soon describe it, and therefore no 

 descvi])tion is here given of it. It has furtlier been ascertained that 

 the graptolites referred to as Didymograptus flaccid us ami annecta}i» 

 are both I'eferrable to the genus Leplograptus. 



Hudson River Formation. — Here we have to hail a new era in our 

 geological nomenclature, having to add this formation to the eight 

 others already known about Oitawa, and with which the Club's work has. 

 dealt. That the shales and arenaceous beds found on a cutting on the 

 Canada Atlantic railway are of this age may be ascertained from the 

 following list of sj)ecies found. The cutting is three miles from 

 Ottawa. Zijgospira headi, B. {O. Erratica, II.), Ortliis testudinaria, 

 and opertriaella, Modiolopsis modlolaris, Conrad {large), JJodiolopsis 

 pholadiforniis (Hall), Amhonychia radiata (Hall) ttc, CyrtoUtes orna- 

 tus (Conrad), Bellerop/ion bilobatus — G. B. 



