iSqg] REPORT OF THE GEOLOGICAL BRANCH. 219 



ethnological research in the Lake Deschenes district proved so 

 attractive a feature of last winter's programme of soirdes given 

 under the auspices of the Club. 



Sub- Excursions. Sub-excursions in geology were held at more 

 or less regular intervals and led by leaders appointed last spring. 

 This phase of our Club's work cannot be emphasized too strongly. 

 Experience has proved that this method of carrying on local work 

 is eminently productive of good results. 



As an instance of work done at one of the sub-excursions 

 held last summer, I beg to submit the following notes on an 

 examination of the lower measures of the Utica formation in 

 Gloucester. On the banks of the Rideau river and at the head of 

 the old Rifle Range rapids, about half a mile above Cummings's 

 Bridge, for a distance ot several hundred feet along the east bank 

 of the Rideau, some twenty-five feet of Lower Utica shales and 

 limestones are exposed in the shape of a low depressed anticline, 

 containing many interesting forms of fossil organic remains. A 

 party of three visited this outcrop, and amongst the best speci- 

 mens obtained may be mentioned the very prettily ornamented 

 brachiopod, Schizambon Canadensis, better known for a number of 

 years under tlie designation Siplionotreta Scoiica, Davidson for 

 the first time recorded by Mr. J. F. Whiteaves of the Geol Survey, 

 Besides many of the species already recorded from this locality in a 

 former paper by the writer, two new or undescribed forms of 

 Ostracoda were found in the same bed : these, it is hoped, will 

 shortly be described in the Ottawa Naturalist. Zygospira Headi, 

 Billings, a torm usually found in the Lorraine formation of eastern 

 Canada, and also recorded from the Cincinnati group or highest 

 Ordovician of Ohio and Kentucky, was also detected in the same 

 bed of impure bituminous limestone containing Schizambon. As 

 far as the writer is aware, this is the earliest record of the occur- 

 rence of this species at so low an horizon in the Ordovician. It is 

 a rather short and rotund form with very fine, delicate longitudinal 

 ribs, and may prove to be worthy of a new designation. It bears 

 some resemblance and affinities to Zygospira Anficostiensis^ Bil- 

 lings, from the limestones of a formation equivalent to the Lor- 

 raine as developed on Anticosti, in the Gulf of St. Lawrence. 



