MAZATLAN UNIVALVES 509 
648. Awacnts Prutva, Sow. 
Columbella fulva, Sow. in Proc. Zool. Soc. 1832, p. 115 :—Thes. 
Conch. p. 138, no. 80, pl. 39, f. 148.—Miill. 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. Mal. 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; CO. B. Adams.—S. W. Mexico, P. P. C.— 
Mazatlan, Menke.—? Do.; 1 dead, young shell; L’pool Col. 
649. ANACHIS NIGROFUSCA, % S. 
A. t. minore, conoided, marginibus spire plus minusve elevate 
excurvatis ; nigrofused, lineis lividis, radiantibus, subundula- 
tis, haud conspicuis ; anfr. normalibus vi. planatis, suturad 
parum impressa ; costulis crebris radiantibus, ad basin con- 
tinuis, interstitits parvis spiraliter decussatis, lineis impressts ; 
seulptura sepe obsoleta ; striis.spiralibus circa basin conspicuis ; 
apertura oblongé; labro varicoso, postice sinuato, intus Vil.- 
dentato ; labio conspicuo, sublevi ; operculo unguiformi, apice 
antico. 
Resembles A. meesta, 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 was 
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. 5, ” 37, ” Live 29 oe i ” 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 SERRATA, 7, S. 
A. t. parva, subelevata, anfr. rotundatis; fusca, purpureo 
maculata ; anfr. Wi. nucleosis, levibus ; anfr. normalibus costis 
radiantibus parum tumentibus, plus minusve conspicuis, spira- 
Liter undulantibus ; irulis spiralibus elevatis costas quasi obtuse 
