Section IV, 1921 [65] Tr.\xs. R.S.C. 



On Connlaria rugosa from the Lockport Limestone at Hamilton, 



Ontario 



By W. S. Dyer, B.A. 



Presented by W. A. Parks, Ph.D., F.R.S.C. 



(Read May Meeting, 1921) 



In the year 1884 Spencer described a species of Connlaria from 

 the Niagara Hmestone at Hamilton, Ontario, which he named Conn- 

 laria rugosa. The specimen was very imperfect and apparently 

 consisted only of the internal cast. His figures are very poor and his 

 description is not at all clear. Fortunately a beautifully preserved 

 specimen has recently been added to the collections of the Royal 

 Ontario Museum and it is thought that a fresh description and new 

 figures of this species would make a desirable addition to the liter- 

 ature of the Conularidae. 



Genus Conularia, Miller 

 CoNULARiA, Miller. Min. Conchology 3, 1821. p. 107, 



Miller's description of the genus is as follows: 



"Shell, a four-sided, elongated pyramid, nearly always straight. 

 Cross-section, a square, long rhomb, rectangle, or rhomboid, or the 

 corresponding figures where the straight lines are replaced by curves. 

 Faces of the pyramid flat, convex or concaved; all equal or equal 

 only in opposite pairs. Angles of the pyramid marked by straight 

 grooves. Aperture partially closed by infolding lobes; apex sharply 

 tapering; apical part of the shell divided into a few compartments by 

 thin, convex, probably imperforate septa. Shell smooth or ornamented 

 with a series of ridges, sometimes longitudinal, more often transverse. 

 Shell very thin, formed of chitin, more or less impregnated by lime." 



Conularia rugosa, Spencer 



Conularia rugosa, Spencer. Bull. Missouri State Mus., 

 1, 1884, p. 57, pis. 8, 9, Figs. 2, 2a\ Trans. Acad. Sci. St. Louis, 

 4, 1884, p. 608, pis. 8, 9, Figs. 2. 2a. 



