I I 



Crinoids. 

 Mr. John Stewart, of our Club, whose collections of crinoids and 

 blastoids from the Trenton of Ottawa have recently been purchased 

 by the Geological Survey Department and placed on exhibition m the 

 Museum, informs me that he has cleaned and prepared iiventy-five more 

 specimens to show che cup, arms and pinnules. The great care, indus- 

 try and skill which Mr. Stewart has display>.'d in developing these 

 " stars " and " lilies " of the old abyssal depths in our district are worthy 

 of much commenda'.ion and eulogy. 



OSTRACODA. 



Amongst the new forms of ostracoda recently described by Prof. 

 Rupert Jones, F.R.S., we find the following species from Aylmer and 

 Ottawa. These forms were collected by Messrs. W. R. Billings, 

 T. W E. Sowter and the writer, of our Club. 



1. Primitia Logani, Jones, Aylmer, Que. 



2. Beyrichia clavigera, Jones, " Que. 



3. " var. clavifracta, Jones, " Que. 



4. Isochilir.a Ottawa, Jones, var. mtermedia, Jones, Ottawa; Ont. 



5. " labellosa, Jones, Aylmer, Que. 



6. Leperditia Balthica (Hisinger), var. primaeva, Jones, Carleton Co. 



7. " sp. (cf. L. liisingeri), Aylmer, Que. 



Of the above, only Primitia Logani, Jones, is referred to the 

 Trenton terrane, the others and chis torm are all Chazy species. 



In the "Journal of the Cincinnati Society of Natural History," 

 Prof. E. O. Ulrich, well known to several members of our Club, has 

 described the new species of Ostracod from Ottawa and also a variety 

 of the same species from the same block of impure hmestone. The 

 specimen sent contained abundance of individuals of an Isochilina, 

 besides a Cyrtodonta 01 allied genus of lamellibranchiate mollusks — all 

 from the Chazy. 



Prof. Ulrich, on pp. 44 and 45 of his paper on " Neiv and LittU 

 Knoivti American Palceozoic Ostracoda^'' and on Plate XL, figs. 12a, 12b, 

 I2C and 13, has described the following forms and named them after one 

 of our Club : — 



I- Isochilina Amiana, Ulrich. 



2. Isochilina Amiana. var. insignis, Ulrich. 



