232 



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

 group. 



Collector. — J. Richardson. 



MURCHISONIA ACREA. (N. sp.) 

 Fig. 216. 



Beserijjtion. — Shell 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 slopiag 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 3^ lines. Apical angle from 15"^ to 20*^. 



This species belongs to that group, of which 31. Anna, so characteristic ■ 

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



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

 group. 



Collector. — J. Richardson. 



MURCHISONIA 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 carinte, separated by concave 

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

 are fine revolving lines on the carinse and in the grooves between. The 

 central carina is usually a little more prominent 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 SIMULATRIX. (N. Sp.) 

 Fig. 218. 



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

 nearly uniformly ventricose whorls, which are slightly the most vcntricose 

 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 



