ONOBA ACULEUS. 643 



It was known to Wood from tlic Coralline Crag- only. Jeffreys reports it from 

 the Red Crag, probably in error, as he gives no locality, and in Lamplugli's paper 

 of 1884 from Bridlington, while A. Bell records it from St. Ertli, the Icenian Crag 

 of Aldeby and Beccles, and from Selsey. 



Onoba aculeus (Gould). Plate LI, fig. 43. 



1841 — 70. Cingula aculeus, Groiiltl, Iiiv. Mass., ed. 1, p. 2Gt\ fig. 172, 1841 ; Risi^oa nrnleus, ed. 2, 



p. 299, fig. 568, 1870. 

 1843. Cingula aculeus, De Kay, N.Y. Moll,, p. iii, \A. vi, fig. 115. 

 1846. Rissoa arctica, Loveii, K. Svensk. Vet.-Akad. Forh., vol. iii, p. 96. 

 1867. Blssoa striata, var. arctica, Jeffreys, Brit. Conch., vol. iv, p. 87. 

 1878. Otioba aculeus, Gt. O. Sars, Moll. Reg. arct. Norv., pp. 172, 359, pi. ix, fig. 12. 

 1883. Bissoa ac^deus, Scott aud Steele, Trans. G-eol. Soc. G-lasgow, vol. vii, p. 279. 

 1899. Bissoa (Onoba) aculeus, Posselt, Medd. om Grunl., vol. xxiii, p. 227. 

 1901. Onoba aculeus, Br^gger, Norges geol. Unders0gelse, No. 31, p. 657, pi. xix, fig. 28. 

 1901. Onoba striata, var. aculeus, Concli. Soc. List, Journ. of Couch., vol. x, p. 18. 

 1910. Onoba aculeus, Odhner, K. Svensk. Vet.-Akad. Handl., Stockholm, vol. vii, p. 9. 

 1915. Onoba aculeus, Johnsou, Bost. Soc. Nat. Hist., Occ. papers, vol. vii, Faun. New England, 



No. 13, p. 118. 



Specific Character >i. — Shell small, rather solid, ovato-cylindrical ; spire elon- 

 gated ; whorls 6, convex, the last much the largest, two-thirds the total length, 

 ornamented by delicate spiral lines wliicli reach the base, and by a few incon- 

 spicuous longitudinal ridges near the apex ; suture deep; mouth ovate, expanded 

 below. 



Dimensioiu. — L. 4 mm. B. 1*5 mm. 



Distribution. — Beceiit: British Seas, with 0. strintd, but more generally northern. 

 Spitzbergen, Greenland, Iceland, Norwegian coast — Christiania fiord to the Lofoten 

 Islands and Finmark. New England coast. 



Fossil : Belfast estuarine clays, Clyde beds — Paisley. Garvel 

 Park, Fort William. 



Isocardia- and Tapes-hanks, Norway. 



Remarhs. — The specimen given under this name from the Pleistocene deposits 

 of Garvel Park seems to agree with the American shell described by Gould and 

 with the Norwegian form figured by Profs. G. 0. Sars and Brjsrgger. According 

 to Jeffreys it is the Bissoa, arctica of Loven. 



The first notice of our shell as a British fossil appeared in a paper published 

 by the Geological Society of Glasgow in 1883 by Messrs. Scott and Steele (loc. cit.). 

 The specimen now figured was obtained by Mr. Bell from a collection of shelly 

 stuff sent him from Garvel Park. 



