MAZATLAN UNIVALVES 519 



665. MtTBEX ? EECXTEVIEOSTBIS, Var. 1IVIDT7S. 



Murex recurvirostris, Brod. in Froc. Zool. Soc. 1832, p. 174. — 

 Milll Syn. Nov. Tesf. Viv. p. m.—Rve. Conch. Ic. pi. 19, 

 f. 75.— a B. Ad. Pan. Shells, p. 124, uo. 140. 



Mures recurvirostnim, Soio. Conch. III. pi. 59, f. 9, no. 13. 



Murex messorius, Wee. in Zeit. f. Mai. 1850, p. 186, no. 65. 

 (Non Sow. Froc. Zool. Soc. 1840, p. 137 -—Conch. III. no. 9, 

 f. 93.— Kien. Icon. Conch, p. 9, no. 5, pi. 10, f. 2.—I>esh. in 

 Zam. An. s. Vert. vol. is. p. 602, no. Gd.—Bve. Conch. Ic. 

 sp. 90.) 



Comp. M. nigrescens. Sow. F. Z. S. loc. cit. : — Conch. III. 

 no. 12, f. 113.— i^we. loc. cit. sp. 92. (Xipixapi, Cuming.— 

 = M. messorius, var. teste Kien. non Desh.) 



Comp. M. rectirostris, Sow. F. Z. S. p. 138 :— (M. rectirostrum,) 

 Conch, m. no. 11, f. ll\.—Rve. loc. cit. sp. 91— C. B. Ad. 

 loc. cit. no. 139. (Xipixapi, Cuminf/.—=M. messorius, var. 

 teste Kien. non Desh.) 



Comp. M. funiculatus, Fve. loe. cit. sp. 74. 



Jif. ? recurvirostris t. lividd,fusco-aurantio supra liras cinctd ; 

 spird depressd seu subelevatd : costis inter varicalihus ii. sen iii., 

 tdti77iis scepe ohsoletis ; liris spiralihus, varices transeuntibus } 

 varicihus iii. plus minusve conspicuis, rotundatis, jiostice inden- 

 tatis ; varice ultimo spind unicd suturam versus plus minusve con- 

 spicuo, spin'2ilis canal em versus minimis , ant ice 

 declivihiis , in canali uno, haud hamato ; varicihus penul- 

 timis scepe spinis ii. rarius iii. in canali, spinis parvis anticis 

 mediants ; anfr. iv. primis ahnormalihus, quorum primus 

 declivis, in adultd semper decollaius, proximus Icevis, proximi 

 cancellati ; lahro extante, crenato ; lahio extante ; tuherctdis 

 intus in lahro, scB])ius in lahio quorpie minorihus, ornatd ; canali 

 interduin recto, interdum plus minusve recurvato ; operculo 

 tenuiore, margine acuto, ruhro-fusco ; extus rugis incrementi, 

 intus nitente ; cicatr. muse, normuliter riigulis p>aucis incrementi, 

 interdum corrugatd ; ovatd, nucleo terminali. 



The Mazatlan specimens, (of which I have carefully examined 

 about 300) are referred by Menke to M. messorius, by Mr. 

 Cuming doubtfully to M. nigrescens, by Mr. Hauley to M. 

 recurvirostris. If the species above cited are all distinct, the 

 Mazatlan form may bo distinct also ; but probably the ex- 

 amination of other local forms may prove some of them to be 

 identical. That the Mazatlan specimens are of one species, I 



