loo ROYAL SOCIETY OF CANADA 



Mr. E. 0. Ulrich, who has made a close study of the early Pahoozoic 

 Gasteropoda, states that no species of Palioacmica has radiatirii; lines, but 

 the tjenus possesses only concentric ridges.' This being the case the 

 Newfoundland species will not fall in Pal'.eacniica. Neither does it belong 

 to an\' other one of the half a dozen genera of Patelloid Pahoozoic mol- 

 luscs named by Ulrich and Scotield ; it seems therefore necessary to give 

 it a 8ei)arate designation. The name is in allusion to the island on the 

 south side of Smith Sound. 



Randomia Al'Rok.k (PI. v., fig. 3a to c). 

 Randomia Aurvrcr, Nat. Hist. Soc, Bull, xviii., p. 190, pi. i, figs. 3a to c. 



This is one of the commoner species of the Etcheminian limestone at 

 Smith Sound. 



An erect high species, oval in outline, about a fifth longer than wide, 

 and about a third wider than high. It has about ten prominent ridges 

 diminishing in size toward the apex. The apex is somewhat in front of the 

 middle of the shell, and the raised concentric ridges are somewhat higher 

 on the dorsal than on the anterior slope. 



Sculpture. — The surface of the shell is marked by very tine sharply 

 raised lines, diverging from the apex toward the margin ; there are about 

 six of these lines in the space of one millimetre. 



Size. — Length of the aperture, 25 mm. ; width, 20 ram. ; height 

 about 16 mm. 



The writer at first was disposed to refer this shell to Stenotheca 

 rugosa var. abrupta, Shaler and Foerste,- with which small examples, 

 having only six ridges, closely agree. But as these authors obtained some 

 twenty specimens of their shell, and found it to have only four or tive 

 ridges, it would appear that it must be distinct. 



The very prominent ridges, straighter dorsal slope, and fine radiating 

 raised lines distinguish it from Stenotheca [?J rugosa, Hall, and S. [?] 

 paupera, Bill. 



PARMOPnORELLA (?) PAUPERA, Bill., sp. 



stenotheca pauper, Bill., Paltcoz. Foss., vol. ii., pt. i., p. 77 (no figure). 

 Parmophorella (f) paupera, Bill, sp.. Bull. Nat. Hist. Soc. N.B., p. IIX). 



This species was described by Billings as follows: "Shell, small ; 

 conical, with the apex incurved, laterally compressed. Aperture ovate, 

 elongate in the plane in which the curvature of the apex occurs. Surface 

 with four or tive small, engirdling convex ridges. 



• Gcolog. and Nat. HLst. Survey of Minnesota, vol. iii., pt. ii., p. 821 (foot). 

 - Mus. Conip. Zool. Canib. Bull., 1888, p. 2i), pi. i., figs. Oa and b. 



