THE GUELPH FOKMATIOIST OP CANADA. 549 



Holopea guelphensis, Billings. Plate XXYI. fig. 18. 



H. Guelphensis, Billings, Palaeozoic Fossils of Canada, vol. p. 159, 

 fig, 143. 



Shell conical, with an elevated spire. Apical augle about 80°. 

 Whorls three, convex, the body-whorl large, but not excessively 

 ventricose. Aperture broadly ovate ; umbilicus small. Surface un- 

 known. 



Length about one inch ; width of base rather less (according to 

 Mr. Billings, 9 lines). Height of aperture six lines; width of aper- 

 ture five ]ines. 



I can add little or nothing to the description of this species given 

 by Mr. Billings — since I have never seen any thing but casts, and 

 the best-preserved specimen in my possession is distorted. H. guel- 

 phensis, though allied to Cyclonema ? elevata, Hall, is clearly distinct 

 from it, the spire of the latter being much more slender and ele- 

 vated, and the apical angle being very much less. 



Formation and Locality. Guelph Limestones ; Elora, Ontario. 

 The same species has been recognized by Hall in the limestones of 

 Racine, Wisconsin. 



Holopea Gkacia, Billings. Plate XXYI. fig. 17. 



H. Gratia, Billings, Palaeozoic Possils of Canada, vol. i. p. 159. 



Shell conical, with a slightly elevated spire. Apical angle 90° or 

 rather more. Whorls four, convex, uniformly ventricose. Body- 

 whorl not much expanded. Aperture apparently rounded. A small 

 umbilicus. Surface unknown. 



According to Mr. Billings, the width is twelve lines, and the length 

 thirteen lines. In the only specimen in my possession the spire is 

 imperfect, and the width is fifteen lines, whilst the length is twelve 

 lines. 



H. Gratia is closely allied to H. guelphensis ; but the spire is more 

 depressed, the apical angle is considerably greater, and the body- 

 whorl is proportionally not so large. 



Formation and Locality. Guelph formation ; Elora, Ontario. 



Subtjlites ventpvIcosus, Hall. Plate XXYI. fig. 5. 



S. ventricosa, Hall, Pal. N. Y. vol. ii. p. 347, pi. Ixxxiii. figs. 7 a, h. 



Shell subulate, with an elongated spire. Yolutions four to six, 

 convex ; the body-whorl ventricose, produced anteriorly, equalling 

 or exceeding in length the remaining whorls put together. Apical 

 angle about 16°. Surface and aperture unknown. 



The dimensions of a small individual are : — length fifteen lines, of 

 which the body- whorl occupies rather more than eight lines ; width 

 of body-whorl five lines. 



My specimens are so poorly preserved that I can add little to the 

 meagre descriptions of this species which have been already pub- 

 lished. The general form of the shell would seem to justify its 

 reference, at any rate provisionally, to the genus JSubulites. 



Formation and Locality. Guelph Limestones ; Hespeler, Ontario. 



