12 
DEVONIAN FAUNA. 
1885. Ctpeicabdinia elongata, Maurer (not d' Archiac and de Verneuil). 
'Abhand. G-rossh. Hessisch. Greol. Landes.,' 
Band i, pt. 2, p. 230, pi. ix, figs. 27—29. 
1888. Aticttla ketiotjlata, Etheridge. Poss. Brit., vol. i, Pal., p. 159. 
1889. Cxpbicabdia guttata, Whidborne. Greol. Mag., dec. 3, vol. vi, p. 79. 
Description. — Shell small, elongate, convex, angulated, oblique. Umbo small, 
recurved, rather prominent, facing forwards, situate on the anterior part of the 
hinge-line. Hinge-line straight behind the umbo, sinking in front of it. Lunule 
apparently rather large and deep. Escutcheon very large, bounded by a sharply 
rounded angle, which runs in a slightly sigmoid line from the back of the umbo to 
the postero-inferior point, and within which it is at first decidedly concave, and. 
then rises to form a small, narrow, obtuse-angled hind wing. Anterior margin 
obliquely concave. Infero -anterior corner slightly produced, bluntly angular. 
Inferior margin oblique, slightly concave or constricted in front, and then for the 
greatest part of its length moderately convex. Infero-posterior point very much 
produced, very convex. Posterior margin short, oblique. Contour of the shell 
very convex vertically, slightly convex horizontally, rapidly rounding over the 
post-umbonal line, and having a shallow vertical concavity or constriction close to 
the anterior margin. Surface covered with twenty-five or thirty rather irregular, 
low, distant ridges, between which are signs of minor lines, each ridge being 
frilled upon its upper surface by fine, short, distant, radiating, discontinuous 
strige, so as to give it a pitted or flounced appearance. 
Size. — Length 13 mm., breadth 7 mm., depth of a single valve 4 mm. 
Localities. — There are three specimens from Lummaton in my Collection, and 
one, probably from the same locality, in the Torquay Museum. From Wolborough 
there are four specimens in the Museum of Practical Geology, some of which are 
so poor as to be almost unrecognisable. 
Remarks. — While from the specimens at our command the characters of the 
species can be fairly made out, their state of preservation is such as to leave some 
points doubtful, and not one of them will enable a perfect figure of the shell to be 
drawn. 
Under the name Avicula {?) reticulata, PhilHps describes a shell from Barton 
which must, I think, be the same species, although there are some points of 
difierence in his figure which render it perplexing. I have been unable to find 
his original example, and his description is too indefinite to help. The chief 
difi'erences in his figure are that the inferior margin forms one regular convex 
arch without any anterior constriction, and that the anterior side seems slightly 
larger. There is a sign of an anterior concavity on the back, which is apparent only 
near the umbo ; but from his description it would appear that he recognised it. As, 
therefore, his shell clearly belongs to the genus Cypricardinia, and not Avicula, 
