226 ROYAL SOCIETY OF CANADA 



margin is greater than in typical M. concentrica. Total length 32 mm., 

 height about 15 mm., anterior extends beyond umbo about 8.3 mm., the 

 umbonal ridge is narrowly convex and nearly straight. 



I give this a name, Modiomorpha Helena, to distinguish it from 

 the Hamilton form wliich it resembles. 



23. Palœoncilo {cf. maxima, Clarl-e) Helena sp. nov. 



A fragment showing the middle part of a shell is referred to this 

 genus. The surface concentric lineations are fine, as in P. plana; a 

 very faint constriction is evident along the umbonal slope; both ends 

 are incomplete so that the exact position of the urnbo cannot be estab- 

 lislied; there are two concentric growth lamellae within the post-frontal 

 portion of the surface. Although the specimen represents a middle 

 devonian type, it is not identical with any species figured. It is similar 

 to and may represent the species referred to as P. maxima, and figured 

 by Clarke from the Gaspé sandstone. (Plate 24, Figs. 4 and 5.) 



24. TeniacuUtes cf. arenosus, Hall. 



A specimen showing the middle part of the shell of a medium sized 

 specimen, has 1 1 annulations in a distance of 5.8 mm., is slender in 

 form and appears to show the external surface. Tlie annulations have 

 the highelst part on the side toward the point of the cone giving the 

 *' appearance of a series of cone-finistrums " characterizing Hall's species 

 T. arenosus. The fragment is smaller and more fniely annulated than 

 the specimen figured by Plall, and il is referred with doubt to this 

 species. 



25. Spirifer pennatus var. Helena, var. nov., H.S.W. 



Ko specimen of this species has been discovered in the lot No. 1 

 from which the above list was made. 



In describing the lot 1, however, as stated above Mr. Ardley called 

 it '' ike flat block of limestone in which are the long winged Spirifers " 

 and upon examination of the original specimens in the McGill College 

 Collection, I find specimen No. 3644 labelled " Spirifer macra, Hall, M. 

 Devonian?, St. Helen's Island, Donor Ed. Ardley" is identical with the 

 specimens a fine series of which from the block obtained on Cote St. 

 Paul furnished the basis for the delscription of the variety Sp. pennatus 

 Helenœ. (Which see beyond, p. 236)— I therefore list it as belonging 

 to the Spirifer arenosus fauna of lot 252.1, St. Helen's. 



The Gyphidula pseudogaleata fauna. 



1. Lichenalia cf. torta. Hall. 



Two fragments of internal surface of the epitheca, showing a flat 

 surface, with concentric wrinkles crossed by very fine radiating striae, 



