MAZATLAN UNIVALVES 511 



alternates maculis fusco-purpureis ornata ; ared infrasuturali 

 candidd, lined spirali vix fused ; anfr. normalibus vi. subrotun- 

 datis, suturd impressd ; costis circiter xiii. radiantibus, rotun- 

 datis, hand valde extantibus, aperturam versus subobsoletis ; 

 interstitiis undulatis ; superficie subnitidd, circa basin tenuiter 

 striulatd ; aperturd siibelongata, subquadratd ; labro incrassato, 

 intus "V.-dentato ; dente postico valido ; labio parum extante, 

 supra columellam corrugato ; canali brevissimo. 



This species is named in remembrance of J. S. Gaskoin, Esq. 

 who had the kindness to bring his extensive knowledge of the 

 ColumbellidsB 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 tseniata, Phil, in Zeit. f. Mai. 1846, p. 54, no. 26. 

 Long. "26, long. spir. '14, lat. '13, div. 33. 



Hah -Mazatlan ; 1 sp. off Chama ; L'pool Col. Callao ; 1 sp. 

 in Mus. Gaskoin ; Petit. 

 Tablet 2430 contains a sketch. 



653. ANACHIS BUFOTINCTA, n. s. 



A. t. parvd, solidiore, compactd, spird parum elevatd, mar* 

 ginibus excurvatis ; albidd, aurantio pallide tinctd, columelld 

 et basi aurantio-rufo dense imbutis ; anfr. iii. nucleosis, l&vibus, 

 iii. normalibus ; t. juniore circa peripheriam subangulatd, 

 tumidd ; costis radiantibus xii-xv. latis, t. juniore ad peripher- 

 iam, t. adultd ad basin continuis, aperturam versus rarius 

 obsoletts ; lineis spiralibus subimpressis, in costis obsoletis ; 

 aperturd subelongatd ; labro intus circiter vi.-dentato, postice 

 sinuato ; labio sublcevi, parum extante. 



9 



This unpretending little species is easily known from A. 

 pygms3a 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. 



Hal. Mazatlan ; 15 sp. (perfect or fragmentary) off Chama 

 and Spondylus ; L'pool Col. 



