y 
‘ 
GASTEROPODA. 
Shell oval, elongated, ventricose, thick; 
whorls rounded or rendered angular by the 
upper portion being channelled ; last whorl 
much developed. Ornamentation usually of pp 
large longitudinal ribs, crossed by numerous f-7s 
stri ; aperture large in the young state, 
slightly notched in front ; columella rounded ; 
umbilical groove deep, narrow, but well de- 
fined. 
Fossil, 8 species. Inferior Oolite—Kelloway 
Fig. 12 Padrpurina 
Rock. England, France, Germany. Bellona. 
ToRELLIA (Loven), Jeffreys, 1867. 
Dedicated to Dr. Otto Torell, of Norway. 
Type, T. vestita, Jeffreys. Shetland and Norway. 
Animal with the produced lips and lingual dentition of 
Capulus.. 
Shell globose, covered with a velvety epidermis; spire very 
short ; apex depressed; aperture roundish ; pillar with a blunt 
tubercle at its base; groove internal, scarcely perceptible ; 
operculum like that of T'richotropis. 
[F Amity NERITOPSIDZ. ] 
Genera :—NERITOPSIS and NARICA with WNaticella as a sub- 
genus (see p. 261). 
[FAMILY PYRAMIDELLID&.*] 
The following genera and sub-genera are additional :—. 
PYRAMIDELLA. Sub-genus Chrysallida, P. Carpenter, 1857, 
Shell pupiform; peristone continuous; edge of lip thin; 
columella-plait distinct, though hidden; operculum in the 
typical species radiately corrugated. 
Distribution, 25 species. EH. and W. Indies, Japan, Mazatlan. 
OpostoMIA. Some of the Mazatlan species have the peri- 
stone continuous. 
Sub-genera :—Auriculina, Gray. 
Shell haying the general aspect of Odostomia, but presenting 
no vestige of a plait. Mazatlan, 3 species. 
Fossil, 4 species. Tertiary. United States. 
Parthenia, Lowe (Hbalia, Adams). Surface sculptured ; 
columella plaited. 
Distribution, 10 species. Mazatlan, Japan. 
* See p. 238. 
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