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DEVONIAN FAUNA. 
2. Genus. — Tuebo, Klein, 1753; Linnseus, 1758. 
The four following species are only represented by poor specimens. In 
general shape they agree with shells of this genus, but whether they really belong 
to it cannot be definitely decided until better specimens come to hand. 
1. Tuebo inamictus, n. sp. PI. XXVII, fig. 1. 
Description. — Shell small, elevated, turbiniform. Spire conical, elevated, of four 
or five rapidly increasing whorls. Suture deep, horizontal, rectangular. Whorls 
rather broad, nearly evenly convex. Body-whorl large, dilated, more than half 
the height of the shell. Base convex. Mouth nearly circular, but pointed above. 
Inner lip much arched, diffuse, thickened. Outer lip dilate and convex. No 
umbilicus. Surface unknown. 
Size. — Height 10 mm., width 7 mm. 
Locality. — Wolborough. A single specimen is in the Torquay Museum. 
Bemm-Jcs. — Little can be said of the small fossil here described. Its surface is 
quite decayed, so that it is impossible to tell whether it was smooth or ornamented. 
In general shape it bears some resemblance to species described under the genus 
Macrochilina, but the character of the aperture seems to show that it does not 
belong to that group of fossils. 
It might very well belong to the Ptychomphalus of Agassiz, a sub-genus of 
Pleurotomaria, if it proved to possess a sinus-band on the body- whorl ; but the 
defective surface of our specimen gives no testimony on this point. 
I have not observed any foreign species to which it is likely to belong ; 
and therefore as it appears to be a distinct form I have suggested for it a 
provisional name. 
2. TuEBO Pengkj-lii, Whidborne. PI. XVII, fig. 14, and PI. XXVII, fig. 7. 
1889. Tuebo Pengellii, Whidborne. Greol. Mag., dec. 3, vol. vi, p. 30. 
Description. — Shell small, turrited, turbiniform. Spire step-shaped, of few 
whorls, probably four or five, rapidly decreasing. Suture well defined. "Whorls 
spreading out almost horizontally aud flatly from the suture for about one-third of 
their breadth, and then traversed by a low, blunt, spiral ridge or angle, after 
