226 



furnished with faint and rather oblique ribs at the nar- 

 rower end only, which disappear about half way up and 

 are not quite regular in their size ; the smooth or upper 

 termination produced obliquely into a syphon, the upper 

 end rounded. 0,28. In fine sand, near Dunbar.* 



NODOSARIA. 



Elongated, straight or slightly arcuated, subconical, 

 rendered nodulous by the inflation of the chambers ; 

 nodules quite smooth (i. e. not longitudinally ribbed) 

 chambers numerous, rather tumid t divided by trans- 

 verse septce which are perforated either in the centre 

 or near the margin. 



N. SPINTJLOSA, NAUTILUS S. Mont. Sup. p. 86. 

 t. 19. f. 6.Turt. D.p. 123. D. p. 349. ORTHO- 

 CERA S. F. p. 236. Pale chesnut, with three very 

 globular joints covered with spines which all incline to 

 the posterior end ; upper bulb a little elongated to form 



* Closely allied to this species, if indeed distinct is the 

 DENTALINA DAVIDSONI. Macg. Aberd*. p. 321. 

 Subarcuated, considerably tapering, somewhat com- 

 pressed, marked in its whole length with transverse 

 crenulated furrows and convex frosted ridges; of twelve 

 somewhat oblique cells, the last much larger ; aperture 

 small and circular ; colour hyaline. 0,16. Aberdeen. 



