MAZATLAN UNIVALVES 511 | 
alternatis maculis fusco-purpureis ornata ; area infrasuturals 
candidé, lined spirali via fusca ; anfr. normalibus vi. subrotun- 
datis, sutur& impressd ; costis circiter xi. radiantibus, rotun- 
datis, haud valde extantibus, aperturam versus subobsoletis ; 
interstittis undulatis ; superficie subnitidd, circa basin tenuiter 
striulaté ; apertura subelongata, subquadrata ; labro incrassato, 
intus V.-dentato; dente postico valido; labio parum extante, 
supra columellam corrugato ; canali brevissimo. 
This species is named in remembrance of J. 8S. Gaskoin, Esq. 
who had the kindness to bring his extensive knowledge of the 
Columbellide to bear on the Mazatlan specimens. In removing 
the incrustation from the only specimen found of this species, 
the shell proved the softer and gave way ; leaving no trace of 
- its existence but the description and sketch in my provisional 
catalogue. It happened however that M. Petit had sent to 
Mr. Gaskoin one specimen from Callao, which so nearly agrees 
with the former that the above diagnosis is pretty confidently 
presented for it. In many respects it appears to resemble 
Columbella teniata, Phil. in Zeit. f. Mal. 1846, p. 54, no. 26. 
Long. °26, long. spir. °14, lat. °13, div. 33°. 
Hab.—Mazatlan ; 1 sp. off Chama; Z’poo0l Col.—Callao; 1 sp. 
in Mus. Gaskoin; Pefit. 
Tablet 2430 contains a sketch. 
653. ANACHIS RUFOTINCTA, 7. s. 
A. t. parva, solidiore, compacté, spird parum elevaté, mar- 
ginibus excurvatis ; albidd, aurantio pallide tincta, columella 
et basi aurantio-rufo dense tmbutis ; anfr. ii. nucleosis, levibus, 
in. normalibus ; t. juniore circa peripheriam subangulata, 
tumidd ; costis radiantibus xii-xy. latis, t. juniore ad peripher- 
zam, t. adulta ad basin continuis, aperturam versus rarius 
obsoletis ; lineis spiralibus subimpressis, in costis obsoletis ; 
aperturé subelongata ; labro intus ecirciter yi.-dentato, postice 
sinuato ; labio sublevi, parum extante. 
This unpretending little species is easily known from A. 
pygmea and its congeners, by the very light colour, and the 
deep orange-red stain at the base. Long. ‘143, long. spir. ‘068, 
lat. ‘075, div. 50°. 
Hah.—Mazatlan ; 15 sp. (perfect or fragmentary) off Chama 
and Spondylus; L’pool Col. 
