78 



Depressulcs. Nautilus tlepressukis, Lin. T/wis. viii. p. 115. 



p. 190. 

 Tab. 18. f. 9. Several of this fpecies in the Boyfian cabinet enables us to 

 give a more full defcription, accompanied by a figure. 



Shell femi-peliucid, glolTy, white, deprefled, with about nine 

 vifiblc fepta radiating from the centre in curved lines 

 marked by their opacity, but do not appear to be the leafl 

 embofled : fides fimilar ; in the centre is a fmall pellucid fpot, 

 which Walker j)robably miftook for afub-umbil/cus. 



Tlie mouth, or anterior end is fomewhat like JV^. calcar, 

 but does not clafp the body fo much ; it differs alfo from that 

 fhell in colour, as well as being vaftly more compreffed, in 

 having no carina, and in the number of concamerations 

 being greater ; neither is this half the fize of that fliell. 



Ujibilicatulvs. Nautilus unibilicatulus. Lin. Trans, viii. p. 115. 



p. 11.9. 

 Tab, 18. f. 1. This is another of the mod rare fpecies of JVautilus, the 

 defcription of which we were formerly obliged to borrow 

 from Walker ; to which we are enabled to add a more 

 comparative defcription, having colle<fted a few fpecimens 

 from Sabella Petiicillus, in the bay of Kingsbridge, where 

 thofe cafes of Amphitrite Veutilabnim are in vaft abundance, 

 and are a perfedl: repofitory of the more common minute 

 JVautili. 



Shell 



