NATIOA. Panama Shells. 201 



exploration of a limited field, 'those who have but little leisure 

 from other pursuits may add much 'to science. 



295. IVatica Chemnitzii. 



Synonymy. , 



The synonymy of this species was overlooked 'Until too late 

 to be completed. With the partial data now before ug, . it 

 appears to be Pfeiffer's JV. Chemnitzii, which, and N.<unifasciata. 

 Lam., and N. lurida Phil., werq included by Koch ^(Zeitschr. 

 fiir Malak. 1844. .p. 154) in the Ohemnitzian species .N,:maroo- 

 cana, the N.marochiensis. of Qme&a, not ofXiamarck. Proba? 

 bly it is the N. maroccana of Menke in his catalogue of Mazat- 

 lan shells, in Zeitschr. fiir Malak. 1847, p. 179. 



Station. — On soft mud near low water mark. 



Habitat. — Mazatlan; MelchersI Menke. 



Guaymas; Lt. Green I Mus. Essex Inst. : also Gould 



MSS. 

 Panama; C. B..A. I 

 We collected 60 specimens at the bottom of the beach next 

 east of Panama. 



296. IVatica lurida f 



Synonymy.' 

 Natica lurida (?) Phil, in KOst. Conch. Cab. 



Station. — Unknown. 

 5airtot— Taboga; 0. B. A.I 

 8 specimens were collected. 



297. nratica Otis. 



Synonymy. 



Natica Otis Brod. and Sowb. in Zool. Joum. IV. 372. 1829. 



Gray in Zool. Beech. Voy. pL 84. f, 13. 1839. 



KUst Conch. Cab. pL 9. f. 4, 1850. 



JULY, 1858. 61 AxK. Lto. Nat. Hist. 



