676 PLIOCENE MOLLUSCA. 



Remarks. — In his 1st Supplement Wood described a minute fossil from the 

 Coralline Crag, referring it, with some doubt, to the American shell N. pusilla, 

 Say, which is grouped by some American geologists with N. clausa, as belonging 

 to a new sub-genus Gryptonatica. I have recently received from Mr. C. W. 

 Johnson of the Boston Society of Natural History several recent specimens, one of 

 which is here figured, enabling me to confirm Wood's identification. I have 

 obtained half a dozen examples of the same species from Oakley, leading me to 

 think it may be obtained from other Crag localities if specially looked for. 



Natica occhisa, S. V. Wood. Plate LVI, fig. 14. 



1848—72. Natica occhisa, S. V. Wood, Mon. Crag Moll., pt. i, p. 146, pi. xii, fig. 4, 1848 ; 1st Suppl., 



pt. i, p. 76, pi. iv, fig. 11, 187-2. 

 1849, Natica clausa, var. elatior, Middendorff, Mem. Acad. Imp. Sci. St. Petersbourg, [6] vol. vi, 



p. 420. 

 1864. Natica occhisa, S. P. Woodward in White's Hist, of Norfolk, ed. 3, p. 118. 

 1870—71. Natica occhisa, A. Bell, Ann. Mag. Nat. Hist, [4], vol. vii, p. 215, 1870 ; Geol. Mag. [1], 



vol. viii, p. 454, 1871. 



1871. Natica occhisa, Morch, Geol. Mag., vol. viii, p. 397, no. 6. 



1872. Natica occhisa, A. and P. Bell, Proc Geol. Assoc, vol. ii, p. 213. 



1877 — 85. Natica affinis, var. occhisa, Jeffreys, Ann. Mag. Nat. Hist. [4], vol. xix, p. 318 ; in Starkie 



Gardner, Quart, Jourii. Geol. Soc, vol. xli. p. 96. 

 1878. Natica clausa, var. elatior, G. O. Sars, Moll. Reg. arct. Norv., p. 160, pi. xii, fig. 1. 

 1901. Natica affinis, var. elatior, Br0gger, Norges geol. Undersogelse, No. 31, p. 721, pi. xii. tig. 1. 

 1912. Natica occlusa, Dautzenberg et P. Fischer, Camp. Scient., Priuce de Monaco, vol. xxvii 



(Mollusques), p. 228. 



Specific Characters. — Shell rather large, globose, smooth and glossy; whorls 5, 

 convex, the last much the largest, ventricose ; suture distinct, rather deep ; mouth 

 oval, one-half the total length ; spire elevated, ending in an acute point; umbilicus 

 entirely closed by the callosity of the inner lip; not so much flattened below the 

 suture as in JV. clausa. 



Dimensions. — L. 26 mm. B. 21 mm. 



Distribution. — I !<■!■<> at .- Finmark. Swedish coast. 



Fossil : Red Crag : Oakley, Shottisham, Butley. Pleistocene : 

 Bridlington. Icelandic Crag (Morch). 



Remarks. — The specimen here given under the present name is the one origin- 

 ally figured by Wood in 1848. It is from the Leckenby Collection at the Sedgwick 

 Museum, having been obtained from Bridlington. Another, which Wood con- 

 sidered to be the same, was afterwards found at Butley. Morch identifies this 

 species from the Crag of Iceland on the authority of Winkler. 



Scandinavian authorities describe a very similar form as a variety, <Jati<>t\ of 

 N. clausa. The latter differs, however, from the typical N. clausa of the Crag and 

 of circumpolar regions by its more elongate spire and its greater flatness below the 



