MAZATLAN UNIVALVES 255 



Tablet 1179 contains 2 rubbed opcrcula, which may have 

 been washed up from young Callopoma saxosum. 



Tablet 1180 contains a shelly operculum (apex broken) which 

 must have had about 10 whirls in a diameter of '45 ; outside 

 nearly smooth, convex ; inside very concave, with the margins 

 of the whirls projecting, and beautifully crenated. 

 Hob. Mazatlan ; from shell washings ; ISpool Col. 



FAMILY NEBITID.E. 

 GENUS NEBITA, Linn. 

 Odontostoma, Klein, non D'Orb., nee Phil. 



4- 326. NEEITA SCABRICOSTA, Lam. 



An. 5. Vert. vol. viii. p. 608, no. 14. Reel, in Petit Journ. 



Conch, vol. i. pp. 287, 410, pi. 11, f. 2. C. B. Ad. Pan. Shells, 



p. 204, no. 304. (Non Deless. in Eec.) 

 =N. [ornata, Sow. Gen.^l. 4, f. 4. Wood, Ind. Test. SuppL 



pi. 8, f. 4. Eve. Conch. S?/st. pi. 202, f. 4 Phil. AbUld. 



p. 1, pi. 1, f. 2, 3. Mice, in Zeit.f. Mai. 1850, p. 167, no. 21. 



Eve. Conch. Ic. pi. 1, f. 3, a, b. 

 + N. Deshayesii, Heel, in Eev. Zool. 1841, p, 184. Eve. Conch. 



Ic. pi. 2, f. 7, a, b. 

 + N. multijugis, MJce. in Zeit.f. Mai. 1847, p. 179, no. 7, 



(teste MJce. ipso, loc. cit. 1850,) Eve. Elem. Conch, pi. 16, 



f.86. 

 = Pila multijugis + P. ornata + P. scabricosta, H. & A. Ad. 



Gen. i. 379, 380. 



The N. ornata of Sow. is referred to the N. scabricosta of 

 Lam. on the undoubting authority of Prof. Adams. The 

 original description (from a supposed unique specimen,) might 

 fit many species ; and Desk, (who was debarred by Kien. from 

 inspecting the Lamarckian types, even when editing the An. s. 

 Vert.) does not venture on synonyms. The N. multijugis of 

 Menke, described from adolescent specimens, was abandoned 

 by himself, and yet appears in modern works as distinct. The 

 form N. Deshaysii, (to which most of the Mazatlan specimens 

 belong) is separated in consequence of having more numerous 



