WORMS. TESTACEA. 71. Nautilus. 307 



*tohatuhis Shell fpiral lobate, the fpires rounded on one fide and de- 

 prefled on the other. 

 Adams Microfc p 642. tab. 14. fi% 36. 

 Found at Whitjiable ; minute white opake. 



* Carina- Shell oblong carinate, with a narrow oval aperture, 

 tu/ust Adams Microfc. p. 642. tab. 14. n~g t 37. 



Found at Sandwich', rare, minute, white opake. 



*Subarcua. Shdl a little bending, -with raifed joints. 



tutus. Jdams Microfc. f, 642. tab. 14. fi g% 38. 



Found at Skeppyi minute opake brown. 



Balthicus. Shell. white convex with a linear aperture: firft whorl far 

 exceeding the others in fize. 

 $chra?t. Einl. in conch. I. tab. 20. fig, I, 2. 

 Inhabits the Baltic ; adhering to the roots of Fuci ; refemWcs 

 M Beccarii j ^^7/ fometimes opake fometimes poliflied, often 

 pellucid : ivhorls fometimes fmooth ftriate ribbed or tuber- 

 culate. 



Helkites. Whorls of the {hells concealed. 



Scbrwt. Einl. in Stein. 4. tab. 10. Jig. 2. 



Found in a foffile (late on St. Peter's Mountain at Maftritch ; 



very lmall : fometimes convex, fometimes depreifed, fmooth 



or ltriate, 



Rugofus. Apertures of the fhell linear : whorls comprefTed with 

 thickened margins. 

 Inhabits the Southern Ocean \ very fmall : white, fomewhat de- 

 preifed j the internal divifions a little prominent outwardly 

 and appearing like tranfverfe wrinkles. 



Umlilka. Aperture of the fhell comprefTed linear : whorls comprefTed: 

 '*'• umbilicus concave. 



Column. Phytob. 2. tab. $%»fig. E. ; 



Inhabits Croatia: minute: fhell obliquely jointed with tranfverfe 

 grooves anfwering to the divifions within, particulary at the 

 keel. 



B. Spiral rounded ; with fepar ate d whorls \ 



Spiotla. Aperture of the fhell orbicular : whorl* cylindrical. 

 Snuammerdam Bib/. Nat. I. tab, *]»fig* 7> 8. 



Lister conch, tab. 550. 2. Bonann. Muf. Kirch. I. fig. 39. 

 Rujjjpf. Muf. tab. Sp.fig. 1, Gualt y test»tab. 19, E 4 



/ 



Qj{ 2 Argent 



