MAZATLAN UNIVALVES 509 



648. ANACHIS PFTTLVA, Sow. 



Columbella fulva, Sow. in Proc. Zool. Soc. 1832, p. 115 >Thes. 



Conch, p. 138, no. 80, pi. 39, f. 148 Mull. Syn. Nov. Test. 



Viv. p. 83. Lam. An. s. Vert. vol. x. p. 281, no. 29 C. B. 



Ad. Pan. Shells, p. 87, no. 85. Mke. in Zeit.f. Mai. 1850, 



p. 184, no. 63. 



Tablet 2426 contains a minute dead shell, with two normal 

 whirls, which may belong to this species. 

 Hab. Panama, Cuming. 'Do. 3 sp. under stones near low 



water mark; C. J5. Adams. S. W. Mexico, P. P. C. 



Mazatlan, Menke.^ Do. ; 1 dead, young shell ; I! pool Col. 



649. ANACHIS NIGEOFUSCA, n. s. 



A. t. minore, conoided, marginibus spires plus minusve elevatce 

 excurvatis ; nigro-fuscd, lineis lividis, radiantibus, subundula- 

 tis, haud conspicuis ; anfr. normalibus vi. planatis, suturd 

 parum impr-essd ; costulis crebris radiantibus, ad basin con* 

 tinuis, interstitiis parvis spiraliler decussatis, lineis impressis ; 

 sculpturd scepe obsoleta ; striis[spiralibus circa basin conspicuis ; 

 aperturci oblong a ; labro varicoso, postice sinuato, intus vii.- 

 dentato ; labio conspicuo, sublavi ; operculo unguiformi, apice 

 antico. 



Resembles A. msesta, nigricans, &c., and partakes of the 

 characters of Drillia. The light lines not corresponding with 

 the ribs gives the latter a waved appearance which does not be- 

 long to them. Only 5 fresh specimens and a dwarfed fragment 

 were found ; in which the decussation of the interstices wa,s 

 rarely marked. The sculpture is generally fainter on the back. 

 A long sp. measures long. *4, long. spir. "21, lat. '15, div. 40. 



A broad sp.,, '37, '17, '17, 50. 



Hab. Mazatlan ; extremely rare ; L'pool Col. 



Tablet 2427 contains a broad sp. with strong sculpture ; and 

 a slender sp. with operculum, sculpture evanescent. 



650. ANACHIS SEEEATA, n. s. 



A. t. parvd, sub&levatd t anfr. rotundatis; fused, purpureo 

 maculatd ; anfr. iii. nucleosis, Icevibus ; anfr. normalibus costis 

 radiantibus parum tumentibus, plus minusve conspicuis, spira- 

 liter undulantibus ; lirulis spiralibus elevatis costas quasi obtuse 



