NAUTILUS. 339 



Inhabits the coasts of Africa. Linn&us. Amboyna. Rum- 

 phius. China. Bonanni. India. D'Avila. 



Shell usually from five to eight inches in diameter; whitish, 

 with waved streaks of reddish or yellow brown, and pearly 

 within. Of this well known species the inhabitants of the 

 East make drinking cups. 



scrobiculatus. 2. Shell with the aperture heart- 

 shaped ; whirls obtuse, smooth ; spire umbili- 

 cated and external. 



Nautilus scrobiculatus. Solander's MSS. Portland Ca- 

 talogue, p. 169. lot 3653. 

 Nautilus Pompilius, Var. $. Gmelin, p. 3369. 

 Nautilus crassus umbilicatus. Chemnitz, x. p. 6. t. 137. f. 



1274 and 1275. 

 Le grand Nautile ombilique. Favanne, i. p. 726. t. 7. f. 



D 3, and t. 69. f. D 2. 

 Lister Conch, t. 552. f. 4. Knorr, iv. t. 22. f. 1 and 2. 



[nhabits the coasts of New Guinea. Humphreys. 



This shell is of about the same size, and is marked nearly in 

 the same manner as N. Pompilius, but the spire is not en- 

 veloped by the outer whirl, and more in the manner of 

 Helix cornea, forms an umbilicated concavity on each side 

 of the shell. I have followed Kasmmerer and Dr. Solander 

 in placing it as a separate species, and the depressed spire at 

 the center so much encreases its resemblance to a Corou 

 Ammonis, that Knorr calls it the only one of the tribe 

 which has been discovered in a recent state. It is a very 

 scarce and valuable shell. 



lacustris. 3. Shell spiral, compressed, umbili- 

 cated, keeled, with three contiguous whirls, 

 convex above ; aperture semi-ovate. 



Nautilus lacustris, Lightfoot in Phil. Trans, lxxvi. 1. 1. f. 1 



to 7. Montagu Test. p. 191. t. 6. f. 3. Maton and 



Racket, in Lin. Trans, viii. p. 114. 

 Planorbis nitidus. Muller Verm. ii. p. 163. Schroeter 



Flussconch, p. 242. t. 5. f. 27. 

 Helix nitida. Gmelin, p. 3624. 

 Helix, No. 315. Schroeter Einleitungy ii. p. 267. 

 Martini Berlin Mag. iv. p. 262. t. 8. f. 22. Walkers 



Minute Shells, t. 1. f. 28. 

 z 2 



