816 TURBO. 



NERITOIDES. 2. Shell ovate, glabrous, rather ob- 

 tuse, and the margin of the pillar flat. 



Turbo iieritoides. Linnczus Syst. Nat. p. ]232. 

 Gualter, t. 45. f. F. 



Inhabits the Mediterranean. Linncens. 



Linnaeus, to the above character and reference to Gualter, has 

 only added that this shell is minute, and very much like a 

 Nerite. T. neritoides of Chemnitz and Gmelin is certainly 

 the Linnaean Nerita littoralis, and Montagu says, " there is 

 little doubt that the Nerita littoralis and Turbo neritoides 

 are only Varieties of the same shell," but Gualter's figure is 

 much more like a young shell of Turbo littoreus. 



NicoBARicus. 3. Shell thick, nearly smooth, and 

 variegated with somewhat reticulated lines ; 

 pillar-lip callous, and the throat yellow. 



Turbo Nicobaricus. Gmelin, p. 3596. Schreibers Conch. 



i. p. 286. 

 Helix ambigua. Born Index, p. 409. 

 Helix paradoxa. Born Mus. p. 394. t. 13. f. l6 and 17. 

 Chrysostomus Nicobaricus. Chemnitz, v. p. 21 6. 1. 182. f. 



1822 to 1825. 

 Inhabits the coasts of the Nicobar Islands. Chemnitz. 

 Shell about eight or ten lines long, and equally broad, and is 

 shaped somewhat like a Nerite with five convex whirls ; two 

 of Chemnitz's figures are whitish, marked with minute dark 

 brown closely reticulated lines ; and the others, as well as 

 Born's, are clouded with short red and yellow streaks. 



NiGERRiMUS. 4. Shell smooth, very black, with 

 the whirls excavated at the sutures, and the 

 pillar-lip flattish. 



Turbo nigerrimus. Gmelin, p. 3597. Schreibers Conch. 



i. p. 275. 

 Turbo, No. 54. Schroeter Einl. ii. p. 83. 

 Cochlea lunaris pernigra. Chemnitz, v. p. 228. 1. 185. f. 



1848. 

 Nerita glaucina, Var. Born Mus. p. 397- t. 13. f. 20 and 



21.? Gmelin, p. 3671.? 

 Nerita, No 93. Schroeter Einl. ii. p. 331 . ? 

 Variety. With white dots. 

 Turbo, No. 55. Schroeter Einl. ii. p. 83. ' 

 Chemnitz, v. p. 229. 1. 185. f. 1849. 



