226 



PLEUROTOMARIA SPONSA. (N. sp.) 



Description. Shell small, turbinate, with four ventricose whorls ; apical 

 angle from 75 to 85 ; the general form like that of a Holopea. The 

 whorls are nearly uniformly convex, most tumid a little below the middle, 

 where there is a narrow convex distinctly elevated band, above which the 

 whorl is depressed convex to the suture. In the upper whorls the band 

 is either close to the suture on the lower edge of the whorl, or . else 

 concealed. Under side rather strongly convex, with an angular carina at 

 the edge of the umbilicus ; the latter small, about one-sixth the whole 

 width of the base. Surface apparently smooth, but probably finely 

 striated. 



Length from 4 to 8 lines ; width a little less than the length. 



None of the specimens have the aperture perfect, but they show, that 

 of the inner side, the upper half is formed by the penultimate whorl, and 

 the lower half by a slightly reflexed lip. 



Locality and Formation. N, Table Head, Newfoundland ; Quebec 

 group. 



Collector. J. Richardson. 



PLEUROTOMARIA ETNA. (N. sp.) 

 b 



Fig. 210. Fig. 211. 



Fig. 210 Pleurotomaria Etna, a, b, views of a small and a large 



specimen. 

 211 P. Hortensia. 



Description. Shell pyramidal ; apical angle varying from 65 to 90. 

 Whorls from four to seven ; on the upper side nearly flat, a fain groove 

 just above the lower edge ; on the under side flat and nearly horizontal, 

 rounded at the umbilical edge. Umbilicus about one-third the whole 



