688 PLIOCENE MOLLUSCA. 



1878. Natica (Lunatia) intermedia, Monterosato, Enum. e Sinon. Conch. Medit. (Griorn. Sci. Nat. ed 



Econ. Palermo, vol. xiii), p. 36. 

 1878. Lunatia intermedia, G. O. Sars, Moll. Eeg. arct. Norv., pp. 157, 358. 

 1883. Natica (Naticina) Alderi and vars., Bucquov, Dautzenberg et Dollfus, Moll. mar. Rouss., vol. i. 



p. 143, pl.xviii, figs. 13,14. 

 1890. Natica intermedia, Cams, Prod. Faun. Medit., vol. ii, p. 305. 

 1892. Natica Alderi, Locard, Coq. mar. Cotes de France, p. 183. 

 1901. Lunatia intermedia, Br0gger, Norges geol. Unders0gelse, No. 31, p. 660. 

 1901. Natica (Naticina) Alderi, Kobelt, Icon, schalentrag. europ. Meei-esconch., vol. ii, p. 93, pi. liv, 



figs. 12— 15. 

 1912. Natica Alderi, Tesch., Med. v. Rijks. v. Delfstoffen, No. 4, p. 66, no. 149. 

 1912. Natica (Naticina) nitida, Dautzenberg et Fischer, Camp. Scient., Prince de Monaco, vol. xxxvii 



(Mollusques), p. 239. 

 1912. Lunatia nitida, Odhner, K. Svensk. Vet.-Akad. Handl., vol. 1, p. 24. 



Specific Characters. — Shell small, solid, smooth, globose; whorls 5, slightly 

 convex, rapidly increasing in size, the last tumid, somewhat compressed above, 

 much the largest, seven-eighths the total length ; spire very short but prominent, 

 ending in a blunt point ; suture slight ; mouth acutely angulate above, obtusely 

 rounded below; outer lip with a blunt edge, but little expanded ; inner lip broad, 

 forming a thick callosity at the upper augle of the mouth and a thick triangular 

 pad in the middle projecting over the upper part of the umbilicus, which is 

 narrow and oblique. In the recent state the shell is ornamented by spiral rows of 

 spots or streaks, but these have been removed by erosion from fossil specimens. 



Dimensions. — L. 15 mm. B. 13 mm. 



Distribution. — Recent : British seas, widely distributed. Iceland, Norwegian 

 coast from the Lofoten Isles southward ; West Atlantic, Mediterranean, Adriatic. 



Fossil : Coralline Crap- : Gedp-rave. Waltonian : Walton-on- 

 Naze, Beaumont, Little Oakley. Newbournian : Sutton, Ramsholt, Newbourn. 

 Butleyan : Bawdsey, Butley. Icenian : Aldeby, Yarn Hill, Beccles. Isle of Man. 

 Pleistocene: Mid. Grlac. sands: Hopton, Billockby. March (F. W. H.), Kelsea Hill, 

 Selsey, Nar Valley, Gloppa, Macclesfield, Moel Tryfaen, Worden. Scotland — King 

 Edward, Largo Bay. Ireland — Wexford to Portrush. Scaldisien, Poederlien. 



I Upper Pliocene : Sicily — Messina, Caltabiano. Scaldisien, Poederlien, Am- 

 stelien : Holland. 



Pleistocene : Christiania fiord (Br#gger), Trondhjem (0yen). Ficarazzi, Monte 

 Pellegrino, Reggio, Castroreale. 



Remarks. — This British and southern form has been found at all horizons of 

 the East Anglian Crag though not very commonly. It occurs also in many of 

 our Pleistocene deposits, having been obtained formerly in great abundance by the 

 late C. B. Rose in the Nar valley brick-earth. I found it to be fairly common also 

 in the March gravels. 



It has been obtained from the Upper Pliocene of the Dutch borings and 

 from the Upper Pliocene as well as from the Pleistocene of Sicily. Prof. B rigger 



