GASTHROPODA. 
Type, S. typicus. Upper Coal Measures. Springfield, Ilinois. 
_ Shell fusiform, smooth, body whorls contracted below into a 
distinct straight canal, with an oblique plait on the columella. 
Agrees with Macrocheilus in its smooth surface and columella 
fold, but differs in its fusiform outline, narrow aperture, and 
distinct canal. In its general appearance resembles /ascioluria, 
but has only one instead of two or three columella folds, and is 
destitute of ornamentation, and its outer lip is smooth within. 
EUCHRYSALIS, Lambe. 
Fossil, 6 species. St. Cassian, Austria. 
[FAMILY STILIFERIDZ. | 
The genera are :-— 
STILIFER.—Dr. Fischer supposes that Stilifer, though living 
like a parasite on the tegumentary system of the echinoderms or 
their appendages, does not feed on their substance, as has been 
supposed. Mr. Gwyn Jeffreys’s impression is that it feeds on 
the excretions of the echinoderms. 
STYLIFERINA, Adams. 
Shell imperforated, ovateconical, thin, smooth; whorls many, 
produced in a styliform spire; nucleus sinistral; aperture sub- 
quadrate; lp simple, straight. 
Distribution, 2 species. Japan. 
M. Freyer, of Trieste, is of opinion that Entoconcha (L. 
murabilis), which is parasitic on Synapta digitata, is the 
embryonic condition of a species of Natica. 
Famity I1.—CERITHIADZ.* 
Includes CrEriTHium (Lhinoclavis and Bittiwm), TRIFoRIs, 
PorAmipres (Vicarya, Cerithidea, Terebralia, Pyrazus, and 
Lampania), NERINazA, and the following additional genera 
and sub-genera :— ; 
CERITHIUM.—Sub-genus. Sandbergeria, Bosquet, 1860. 
Dedicated to Professor Sandberger. Type, Cerithium cancel- 
lata, Nyst. sp. Shell short, like Cerithium, canal terminal, 
very broad, and short. M. Bosquet describes the type ag 
having an operculum as in Stenothyra; itis very questionable 
as to whether the operculum belonged to the shell. 
; * See p. 242, &e. 
