ALARIA. J 13 



31. Alaria. Variety, or immature form. Plate IV, figs. 5 a, 5 b. 



1884. Alaeia Phillipsii, spinulose variety. Hudleston in Geo!. Mag., dec. iii, 



vol. i, p. 149, pi. 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 Alarice, 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 costse, 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. unicarinata. In order to avoid mistakes it may be distin- 

 guished for the present as Al. spinulosa. Rare in the Dogger of Blue Wyke. 



32. Alakia hamus, Deslongchamps, 1842. Plate IV, figs. 6 a, 6 b, 6 c, 6 d ; 



Plate VII, fig. 9. 



1842. Rostellaeia hamus, Besl. Mem. Soc. Linn. Norm., vol. vii, p. 173, pi. ix, 



figs. 32—36. 

 1850. Pteboceba hamus, D'Orbigny. Prod., i, p. 270. 



1864. Alaeia iiamvs, JEud. Besl. Piette, Cont. de la Pal. Fran?., p. 39, pi. v, 



figs. 1 — 11, &c, including several varieties. 

 Non Alaeia hamus, Besl. In Morris and Lycett, Great-Ool. Moll., p. 16, pi. 

 iii, figs. 2, 2 a, 2 b. 



Bibliography, 8fc. — The identity of the Normandy fossil with the " Bostellaria 

 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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