NATICA (LUNATIA) CIRRIFORMIS. 685 



Specific Characters. — Shell oval, globose, thick and solid, somewhat glossy » 

 spire very short, slightly prominent; whorls 5, tumid, compressed above, rapidly 

 enlarging, the last much the largest, nine-tenths the total length ; suture very 

 slight ; mouth twice as long as the spire, expanded ; outer lip slightly incurved 

 above; inner lip thick and broad, separated from the latter by a very narrow 

 groove, reflected over the upper part of the umbilicus; umbilicus fairly large, 

 deep, open. 



Dimensions. — L. 20 — 25 mm. B. 16 — 22 mm. 



Distribution. — Recent; English coast (south-west), Scotland, Ireland. Atlantic 

 coasts as far south as Gibraltar. Mediterranean. — Corsica, Sicily, Algiers; 

 Adriatic. 



Fossil: Lower Pliocene : Piacentino (Brocchi). 



Upper Pliocene : Messina. 



Remarks. — This rare southern species, found at places in the seas of Great 

 Britain, has not been reported from the East Anglian or the Belgian Crags. 

 There are several specimens, however, from St. Erth in the British Museum of 

 Natural History bearing the present name, but there seems some doubt as to whether 

 they have been correctly identified. It seems desirable, therefore, to figure a 

 verified recent specimen from my own collection for comparison, leaving the 

 question of its occurrence or not as a British fossil in abeyance. 



N. fusca was known to Forbes and Hanley, Jeffreys and others under 

 Swainson's name of N. soraida and generally as belonging to the subgenus 

 Naticina. It is now grouped with Lunatia. It seems to be specially characterised 

 by the flattening or compression of the upper part of the whorls below the suture. 



Natica (Lunatia) cirriformis (J. Sowerby). Plate LV, figs. 2, 3. 



1825. Natica cirriformis, J. Sowerby, Min. Conch., vol. v, p. 125, pi. cccclxxix, fig. 1. 



1842—48. Natica cirriformis, S. V. Wood, Ann. Mag. Nat, Hist. (1), vol. ix, p. 529, 1842 ; Mon. 



Crag Moll., pt. i, p. 145, pi. xvi, fig. 7, 1848. 

 1843—81. Natica cirriformis, Nyst, Coq. foss. Belg., p. 444, pi. xxxix, fig. 1, 1843; Conch. Terr. 



tert. Belg., p. 66, pi. v, fig. 6, 1881. 



1870. Natica cirriformis, A. Bell, Ann. Mag. Nat. Hist [4], vol. vi, p. 215. 



1871. Natica sordida, Jeffreys, Quart. Journ. Geol. Soc, vol. xxvii, pp. 144, 489. 



1872. Natica cirriformis, A. and R. Bell, Proc. Geol. Assoc, vol. ii, pp. 203, 209. 



1874_92. Natica cirriformis, Van den Broeck, Ann. Soc. nialac. Belg., vol. ix, p. 187, 1874; Bull. Soc. 



Belg. Geol., vol. vi (Memoires), pp. 122, 132, 1892. 

 1876. Natica cirriformis, Seguenza, Boll. E. Com. Geol. Ital, vol. vii, p. 10, no. 482. 

 1890. Natica cirriformis, C. Eeid, Plioc. Dep. Brit., p. 249. 

 1903. Natica cirriformis, Dollfus, Cotter et Gomes, Moll. tert. du Portugal, p. 18, pi. xxxv, fig. 4. 



Specific Characters. — Shell smooth, oblique, thick and solid; whorls 5, the last 

 globose, much the largest, rounded, not excavated below ; spire short, flattened, 

 about |th of the total length ; suture well-marked, channelled ; mouth semilunar, 



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