232 



Locality and Formation. — K, Table Head, JSIewfoundland ; Quebec 

 group. 



Collector. — J. Richardson. 



MUKCHISONIA ACREA. (N. Sp.) 

 Fig. 216. 



Description. — Sliell rather small and slender, somewhat turretted; 

 ■whorls from twelve to fifteen, flat or sub -concave, each with the lower 

 edge rounded and sub-angulated, projecting a little over the one below ; all 

 above this projection flat or gently concave, and sloping to the suture, 

 close to which there is a slight convexity. Surface characters unknown. 



A specimen of eleven whorls is 11 lines in length ; diameter at the last 

 whorl 3i lines. Apical angle from 15^ to 20"^. 



This species belongs to that group, of which M. Anna, so chai-acterisiic 

 of the Calciferous, is an example. It resembles a small Turritella. 



Locality and Formation. — G, Port aux Choix, Newfoundland; Quebec 

 group. 



Collector. — J. Richardson. 



MuacHisoNiA Adelina. (N. sp.) 



Fig. 217. 



Description. — Shell elongate, tapering at the rate of about one line to 

 the inch. "Whorls from fifteen to twenty, nearly flat or gently convex, 

 with three equi-distant slightly elevated carina, separated by concave 

 spiral grooves. Suture rather deep. The only surface markings visible 

 are fine revolving hues on the carinae and in the grooves between. The 

 central carina is usually a little more promment than the others, and all 

 appear to be acutely edged, when perfect. 



Length about 3 inches ; diameter at last whorl 6 lines. 



Locality and Formation. — G, Cape Norman, Newfoundland ; Quebec 

 group. 



Collector. — J. Richardson. 



MURCHISONIA SIMDLATRIX. (N. Sp.) 

 Fig. 218. 



Description. — Shell small and rather slender, with from ten to thirteen 

 nearly uniformly ventricose whorls, which are slightly the most ventricose 

 in the lower half. Aperture ovate, formed on the upper and inner side 

 by the penultimate whorl, not free ; no umbilicus. The band is narrow 



