ALARIA. 113 
31. Auaria. Variety, or immature form. Plate IV, figs. 5 a, 5 b. 
1884, ALarta PHILLIpsi, spinulose variety. Hudleston in Geol. Mag., dee. iii, 
vol. i, p. 149, pl. vi, fig. 5. 
Length from 18—25 mm., spiral angle rather over 30°, number of whorls nine. 
The apex, as is the case with nearly all Alavie, consists of two and a half smooth, 
rather tumid whorls, but the apical angle as distinct from the spiral angle is only 
slightly convex. ‘The remaining whorls of the spire are tumid and moderately 
angular. The longitudinal cost, at first extending almost from suture to suture, 
become much shorter on the penultimate and last whorl, where they present the 
appearance of spinulose nodes. The spirals of the posterior area in each whorl 
are fine and numerous ; the primary spirals on the anterior area are four, the 
uppermost one serving as keel. The body-whorl is moderately bicarinate, but 
the anterior carina probably dies out. The wing is formed on the posterior carina, 
but no prolonged digitation has been noted. 
Aperture wide and triangular; canal straight, as far as known. 
Originally it was considered that this form might be a variety of Al. Phillipsii ; 
but, if it be not a distinct species, I am disposed to consider that it may be an 
immature form of Al. wnicarinata. In order to avoid mistakes it may be distin- 
guished for the present as AL. sprnuLosa. Rare in the Dogger of Blue Wyke. 
32. Ataria HAMUS, Deslongchamps, 1842. Plate IV, figs. 6 a, 6 b, 6c, 6d; 
Plate VII, fig. 9. 
1842. Rosrerparta Hamus, Desi. Mém. Soc. Linn. Norm., vol. vii, p. 173, pl. ix, 
figs. 32—36. 
1850. PrErrocera Hamus, D’Orbigny. Prod., 1, p. 270. 
1864. Ararta Hamus, Eud. Desl. Piette, Cont. de la Pal. Frang., p. 39, pl. v, 
figs. 1—11, &c., including several varieties. 
Non ALARIA HAMus, Desi. In Morris and Lycett, Great-Ool. Moll., p. 16, pl. 
iii, figs. 2, 2a, 20. 
Bibliography, §c.—The identity of the Normandy fossil with the “ Rostellaria 
composita” figured by Phillips (subsequently the Pterocera Phillipsii of the 
Prodrome) was evidently suspected by Deslongchamps. That author describes 
Al. hamus as a common fossil of the “ Oolithe ferrugineuse.” Only one example 
was known to him from the Great Oolite. The fact of its rarity in the Great 
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