MITRA. 



Panama Shells. - 43 



La Paz ; Major Rich! Grould Mss. 



Panama ; E. Jewett ! Gould Mss. 



Panama ; C. B. A. ! 

 "We were indebted to the hermit crabs for 24 specimens in 

 diflFerent stages of growth. 



Kiener's statement is doubtless erroneous. 



18. Mitra nucleola. 



Si/nont/my. 



Mitra nucleola Lam. in Ann. Mus. XVII. 218. No. 64. 1811. 



Lam. An. sans Vert. VIL 320. Ko. 64. Aug. 1822. 



Kiener Iconog. p. 84. pi. 26. f. 83. vars. excl. 



Pot. & Mich. Gal. Moll. Mus. Douai. I. 499. pi. 36. 



f. 15. 16. 1838. 



Kust. Conch. Cab. p. 112. No. 95. pi. 17. f. 18. 19 ? 1844. 



Lam. An. sans Vert. X. 337. No. 64. (Desh. ed.) 1844. 



R«eve Conch. Icon. pi. 28. f. 226. Jan. 1845. 



"We had at first some doubts of the identity of our speci- 

 mens with the Lamarckian species, but the differences be- 

 tween their form and that of Mr. Reeve's figure are precisely 

 similar to those between the half-grown, and the mature M, 

 granulosa of the Caribbean seas. M. Kiener's remarks leave 

 no room for doubt. Our shells, being fresh, are of a deep 

 brown, like fresh specimens of the Caribbean species. 



Station. — Unknown. , . , 



Habitat. — Unknown ; Lamarck : also Potiez and Miohaud : 

 also Reeve. 

 Indian Ocean, seas of Java ; Kiener. 

 Panama ; C. B. A. ! 

 We obtained 11 specimens, none of which are quite ma- 

 ture. Kiener's statement of habitat is probably incorrect. 



Kiener remarks that this shell is only a variety of Mitra 

 granulosa ; Reeve says that there is " no analogy whatever," 



