NASSA CONSOCIATA. 75 



Specific Charactrrs. — Differs from iV. moiiensis in its more slender form, and in 

 the absence of spiral sculpture. 



jyimensions. — L. 16 mm. B. 8 mm. 



Distrihntion. — Not known living. 

 Fossil : Isle of Man. 



Liemaiis. — This shell, which was described by Prof. Kendall as new and is 

 regarded as distinct by Mr. Lamplugh, belongs to the iV. motiensis group. It 

 might almost be considered a variety of that species were it not that all the 

 specimens known to me, as well as those figured by Prof. Kendall, are without 

 spiral sculpture. The figure in the Survey Memoir shows, it is true, fine trans- 

 verse striation, but this seems to have been a mistake on the part of the artist, as 

 the specimens in the Jermyn Street collection show no sign of it. The spire is 

 more elongate in N. Kermodei than in the type form of N. monensis. 1 have a 

 fossil from Oakley which may be the same, but it is not sufficiently good for 

 satisfactory identification, 



Nassa limatula, Dollfus and Dautzenberg. Plate IV, figs. 9, 10. 

 1886. Nassa limatula, Dollfus et Dautzenberg, Et. prel. Coc[. foss. Fal. Tour., p. 11. 



Specific Characters. — Shell slender, rather thin ; whorls seven, very slightly 

 convex, and flattened below the suture ; spire elongate, Avith an obtuse apex ; the 

 first two whorls are smooth, the others ornamented with about twenty very narrow 

 and acute longitudinal ribs, the spaces between them being wider than the ribs, 

 together with numerous exceedingly fine thread-like spiral ridges closely crowded 

 together, extending to the base of the shell, those just below the suture being 

 stronger and further apart, forming a marginal band at the top of each whorl; 

 mouth oval, acutely angulate above, with a tooth on the upper part of the inner 

 lip ; outer lip thickened outside by a strong labial rib, with a row of rounded 

 tubercles within ; canal open, very short, turning to the left. 



Dbnensions. — L. 10 mm. B. 5 mm. 



Distrihntion. — Not known living. 



Fossil ; Waltonian Crag : Little Oakley. Miocene : Touraine. 



Remarks. — I have a single specimen from Oakley of this Miocene species which 

 MM. Dollfus and Dautzenberg are about to describe under the above name ; though 

 Avorn, it corresponds with one they have kindly sent me from Touraine. I have 

 figured both to show they are identical. 



Nassa consociata, S. V. Wood. Plate IV, figs. 17, 18 ; Plate XIII, fig. 19. 



1843. Buccinum elegans, Nyst. Coq. foss. Terr. Tert. Belg., vol. xiii, fig. 19, p. 576, pi. xliii, fig. 13. 



1848. Nassa consociata, S. V. Wood, Mon. Crag Moll., pt. i, p. 31, tab. iii, fig. 7. 



1871. Nassa elegans, var., Jeffreys iu Prestwich, Quart. Jouru. Geol. Soc, vol. xxvii, pp. 144, 489. 



