512 MAZATLAN UNIVALVES 



Tablet 2431 contains 2 young sp. and one adult, perfect ; 

 also two fragments esliibiting variations in sculpture. 



634 AnACHIS ALBOIfODOSA, n. s. 



A. t. minore, conoidea, marginihus spires valde excurvatis, 

 antice angustd; albido'virescente, maculis et lineis ziczac-for- 

 mihus castaneis irregular iter ornatd, infa suturam vix impressam 

 albo maeulata ; anfr. iii. nucleosis, suheffusis, Icevibus, sed prop- 

 ter tineas coloris pallidiores quasi corrugatis ; anfr. normali- 

 bus iv. costis scepe subobsoletis, planatis, juxta basin obsoletis, 

 striis spiralibus circa basin pauds ; aperturd elongatd, con- 

 tractd, contortd ; labro in medio arcuato, inttis dentibus circiter 

 viii. munito, canali postico angusto ; labio continuo, labro attin- 

 gente, Icevi, parum extante. 



This extremely beautiftd but very small species is remarkable 

 for tlie appearance of corrugation (due to colour only) in the 

 somewhat elongated nuclear whirls. A young shell has the ribs 

 extremely faint, and the details of painting different. Long. ' 13, 

 long. spir. -07, lat. -063, div. 40". 

 Sah. — Mazatlan ; 2 sp. off Chama and Spondylus ; L'pool Col. 



Tablet 2432 contains the adult specimen. 



655. ? Anachis , sp. ind. (a.) 



Tablet 2433 contains 4 fragments of a species remarkable for 

 its glossy texture and buff colour, irregularly spotted. The 

 three nuclear whirls are very compact ; the rest rather effuse, 

 and with broad, flattened, but sharply chiseled ribs, resembling 

 in the adult state the young of Col. cervinetta. 



Sab. — Mazatlan ; extremely rare, off Spondjdus ; L'pool Col. 



656. P Anachis , sp. ind. (b.) 



Tablet 2434 contains a very young sp. with 3 nuclear and 2 

 normal whirls, very narrow and elongate, with fine radiating 

 ribs ; white with 3 spiral light chesnut bands. 



Tablet 2135 contains a still younger sp., resembling the last 

 but more compact ; normal whirls commencing, irregularly 

 spotted without bands, with a spiral line close to the suture. 



Sab. — Mazatlan ; extremely rare, off Spondylus ; L'pool Col. 



