333 



turn xviii. 



ARGONAUTA: 



SHELL UNIVALVE, SPIRAL, INVOLUTE, MEMBRANA- 

 CEOUS, WITH A SINGLE CHAMBER. 



argo. 1. Shell with its keel narrow and sharply 

 toothed ; sides nearly flat, with numerous an- 

 gular ridges. 



Argonauta Argo. Linnaus Si/st. Nat. p. Il6l. Born 



Mus. p. 140. Schroeter Einl. i. p. 4. t. 1. f. 1. Gmelin, 



p. 3367- 

 Argonauta sulcata. Lamarck Systeme des Animaux, p. 99. 

 Le Grand Nautile papyrace. Favanne, i. p. 707. t. 7. f. 



A 2. 

 Bonanni Rec. and Kirch. 1. f. 13. Lister Conch, t. 556*. 



f. 7, and t. 557. f. 7. Rumphius, t. 18. f. A. Petiver 



Gaz. t. 127- f. 7. Gualter, t. 12. f. A. Klein Ost. t. 



1. f. 3. Argenville, t. 5. f. A. Se&a, iii. t. 84. f. 6. 



Get>e, t. 2. f. 4. Knorr, i. t. 2. f. 1. Martini, i. 1. 17. 



f. 157. 

 Variety. With the lateral ridges much branched. 

 Le Grand Nautile & Cannelures rameuses. Favanne, i. p. 



709. t. 7. f. A 8. 

 Gualter, 1. 11. f. A. Seba, iii. t. 84. f. 5. 

 Inhabits the shores of America, and the north of St. Domingo 

 near Port de Paix, but principally the Mediterranean, on 

 the coasts of the Adriatic, Sicily, Sardinia, Corsica, Majorca 

 and Minorca. The Variety inhabits the Molucca Islands, 

 and Batavia. Favanne. 

 This species may be readily distinguished from its congeners 

 by its narrow keel, which is on each edge bordered by a 

 row of conical tubercles, and by the ridges on the sides of 

 the shell being destitute of any knotty protuberances ; the 



