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 (1. e. not longitudinally ribbed) 
chambers numerous, rather tumid, divided by trans- 
verse septa which are perforated either in the centre 
or near the margin. 
N. Sprnuxtosa,—Navtitus 8. Mont. Sup. p. 86. 
t.19. f.5.—Turt. D. p. 123.—D. p. 349.—OrTHOo- 
ceRA 8S. 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 spectes, if indeed distinct is the 
Dentauina Davipsoni. 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 5 aperture 
small and circular; colour hyaline. 0,16. Aberdeen. 
