MAZATLAN UNIVALVES 519 



> 665. MUEEX ? BECUEVIEOSTBIS, var. LIVIDUS. 



Murex recurvirostris, Brod. in Proc. Zool. Soc. 1832, p. 174. 

 Mull. Syn, Nov. Test, Viv. p. 92. Eve. Conch. Ic. pi. 19, 

 f. 75. C. B. Ad. Pan. Shells, p. 124, no. 140. 



Murex recurvirostnim, Soiv. Conch. III. pi. 59, f. 9, no. 13. 



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

 (Non Sow. Proc. Zool. Soc. 1840, p. 137 Conch. III. no. 9, 

 f. 93. Kien. Icon. Conch, p. 9, no. 5, pi. 10, f. 2. Desk, in 

 Lam. An. s. Vert. vol. ix. p. 602, no. 69. Eve. Conch. Ic. 

 sp. 90.) 



Comp. M. nigrescens, Sow. P. Z. S. loc. cit. : Conch. III. 

 no. 12, f. 113. Eve. loc. cit. sp. 92. (Xipixapi, Cuming. 

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



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

 Conch. III. no. 11, f. 111. Rve. loc. cit. sp. 91 C. B. Ad. 

 loc. cit. no. 139. (Xipixapi, Cuming.- =M. messorius, var. 

 teste Kien. non Desh.) 



Comp. M. funiculatus, Rve. loc. cit. sp. 74. 



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

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

 ultimis scepe obsoletis ; liris spiralibus, varices transeuntibus ; 

 varicibus iii. plus minusve conspicuis, rotundatis, postice inden- 

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

 spicuo, spinulis canalem versus minimis 9 antic e 

 declivibus , in canali uno t haud hamato ; varicibus penul- 

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

 medianis ; anfr. iv. primis abnormalibus, quorum primus 

 declivis, in adultd semper decollatus, proximus lavis, proximi 

 cancellati ; labro extante, crenato ; labio extante ; tuberculis 

 inlus in labro, s&pius in labio quoque minoribus, ornatd ; canali 

 inter dum recto, inter dum plus minusve recurvato ; operculo 

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

 intus nitente ; cicatr. muse, normaliter rugulis paucis 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. Hanley to M. 

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

 Mazatlan form may be 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 



