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DEVONIAN FAUNA. 
3. Genus — Odontomaria, F. Bomer, 1876. 
This genus was formed for the reception of a Devonian shell in the shape of 
an unrolled Pleurotomaria, with which Prof. Romer regards it as closely allied. 
At first sight our specimens seem very like a Dentalium or even a Serpula, to the 
latter of which some specimens of the following species were formerly referred by 
Sandberger. A close examination, however, seems to bear out Prof. Romer's view, 
which was probably based upon the observation of better preserved specimens 
than those which we have seen. 
1. Odontomaria semipltcata, Sandberger, sp. PL XXXI, figs. 2, 2 a. 
1850. Seepula semiplicata, Sandberger. Verst. Ehein. Nassau, p. 38, pi. iii, 
figs. 6, 6 ffl, 6 b. 
Description. — Shell tubular, slightly arched but not spirally coiled, twisted, 
slowly attenuating at the rate of 1 mm. in width to 9 mm. in length. Whorl or 
tube rather spirally twisted, so that the marks which start on the back or external 
side are, in the course of growth, gradually carried upwards through a quarter of a 
circle. Section of the whorl nearly circular or oval, slightly flattened on the 
sinus-band, and on a broader surface on each side of it. Sinus-band broad, flat, 
bounded by low rounded ridges, situated on the centre of the outer surface of the 
tube. Ornament consisting of two similar slight ridges bounding the flattened 
surface on each side of the sinus-band ; the whole crossed by very indistinct 
growth-lines which appear to cross the sinus-band horizontally, and to be directed 
forward on each side of it. 
Size. — Length 60 mm. Diameters of section at widest part 11 mm. and 9 mm. 
Locality. — Wolborough. There is a specimen in the Torquay Museum, another 
in the Museum of Practical Geology, a third in Mr. Vicary's Collection, and a 
fourth in Mr. Champernowne's Collection. 
Bemai'ks. — These curious shells agree exactly with the fossil described by 
Sandberger from the Stringocephalus-Limestone of Villmar. Their surface is in 
every case almost completely obliterated. They show great regularity in their 
general shape, except that the amount of curvatures seems greater in some parts 
of the tube than in others, and that the section of the whorl is in some cases 
circular and in other cases oval. 
Affinities. — The present species presents great resemblance to the type species 
