NATICA. 265 
in the spire and more tumid in the body-whorls than specimens from the Dogger. 
Without doubt these obscure and often ill-preserved forms are nearly related to 
Natica Bajocensis, but it would be scarcely safe to say that they are identical. 
200. ? Narica (Husprka) PRotracta, sp.nov. Plate XX, fig. 15. 
Description : 
General spiral angle about : : 37 00" 
Height of body-whorl to entire ee : - oo 2 100; 
Length about : ; . 95 mm. 
Shell thick, sub-elongate, Euspiroid, aan twice as long as wide. Apex 
? blunt, number of whorls ? six or seven, angular, protracted, and strongly 
tabulate, scarcely canaliculate. The whorls of the spire are swollen towards the 
centre. Body-whorl only moderately tumid, with a slight tendency towards 
a median keel; fine spiral lines 3} mm. apart, decussate with curved growth-lines. 
Aperture ovate-elongate, the longer diameter being slightly less than half the 
entire length of the shell. 
Relations and Distribution.—It must be admitted that this rare form has not 
much the appearance of a Natica, though possibly, with the aid of the sub-genus 
Euspira, it may come to be regarded as one of the Naticide. It has a certain 
degree of resemblance to Pseudomelania, but against this view we must place the 
relative size of the aperture, and also the fine and curved, rather than sinuous, 
erowth-lines. There is just the possibility that these shells represent a diseased 
or abnormal growth of some other species, though what that species may have 
been it is by no means easy to indicate. 
Two specimens are in my collection; these are believed to have come from 
the Parkinsoni-zone of Bradford Abbas. 
201. Navica canaticuLata, Morris and Dycett, 1851. Plate XX, fig. 16. 
1851. Evsprra canaticutata, Morris and Lycett. Great Ool. Moll., part i, 
p. 45, pl. xi, fig. 23. 
Narica (Eusprra) canaticutata, Morris and Lycett. In the Explanation 
of pl. xi. 
Bibliography, §c.—The authors observe that several specimens have been 
extracted from the limestone beds of the Great Oolite, but that it is much more 
common in the middle beds of the Inferior Oolite in Gloucestershire. Having 
never been able to see any specimens of Huspira canaliculata from the Great 
34. 
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