79 



Shell comprefled, fub- pellucid, white, with nine or ten 

 raifed joints ; the anterior end, or mouth, clafping the body 

 whirl nearly equal, within which any interior volution is 

 loft, and by which an umbilicus is formed on both fides. 



This is by far the mofl minute of any fpecies of J^Tautilus 

 we have yet examined, not half as large as the Crajfidus to 

 which it bears fome affinity ; but befides being fub-hyaline, 

 the fepta are lefs numerous, and the joints become occult 

 after a fingle turn ; whereas in the Craffulus the volution 

 does not terminate at tlie mouth and become loft, but part of 

 the fecond volution is vifible beyond the jun(5tion of the firfl, 

 and is gradually loft in tlie umbilicus. 



Nautilus Crassulus. Lin. Trans, viii. p. 1 17. Crassulos. 



p. 191 

 From the Boyfian cabinet we are alfo enabled todefcribe ^^^^ is f 2 



this fliell more fully, in addition to what we have formerly 

 given, which at that time was copied from Walker, in de- 

 feat of our perfonal acquaintance with this rare fpecies. 



Shell fpiral, ftrong, opaque, pale brown, with numerous 

 clofe-fet elevated joints ; fides comprefled, fimilar, umbili- 

 cated, fliev/ing part of the interior volution within the urn- 

 hilicus : mouth placed a little oblique, fcarcely clafping the 

 body, and furniflied with a fyphon. 



This very minute fpecies was marked in the cabinet 70,as 

 referenc 

 Walker. 



a reference to the figure to which that number is affixed in 



Nautilus 



