104 



Description. — Y&rj small, elongate, conical, slender, slightly curved, 

 often in more than one direction ; radiating septa alternating m size, about 

 fourteen of the larger with an equal number of the smaller, at the margin, 

 of individuals of the average size. Surface with a few obscure undulations 

 of growth. Cup moderately deep. 



Length, from 3 to 4 lines ; width of the cup at the margin, about 1 

 line ; depth of the cup, from i to f of a lii;ie. 



This little species occurs in immense numbers in the Middle SUurian on 

 the Island of Anticosti. 



Locality and Formation. — Challoupe River, Anticosti ; division 4, 

 Middle Silurian. 



Collector. — J. Richardson. 



Peteaia latuscula. (N. sp.) 



Fig. 92, a, b. 



Description. — CoraUum of medium size, short, turbinate, nearly straight 

 slightly curved towards the base, expanding to a width of from 8 to 10 

 lines in a length of from 5 to 8 hnes, then becoming cylindrical or nearly 

 80. Cup rather deep. Radiatiag septa, as indicated by the external 

 markings, about 50. Surface with a few obscure undulations of growth ; 

 the longitudmal striae representiag the septa are usually obscure, but in 

 some specimens distinctly marked. 



The most abundant specimens are from 5 to 10 lines in length, and from 

 8 to 10 lines in width at the margia. In one specimen 13 Unes iu length, 

 the width of the cup is 10 lines and the depth 5 lines. 



Locality and Formation. — The Jumpers, Anticosti ; division 4. Mid- 

 dle SUurian. 



Collector. — J. Richardson. 



