The texture has a rotten appearance; yet one of the specimens was stained with purple, and contained the dried remains of the animal, with its operculum. In the endeavor to extract this, the shell gave way. Genus NASSA, _Lam._ _Nassa insculpta_, Cpr. n. s. State Collection, No. 1008. N. t. satis elevatâ, compactâ, tenuiore, elegantissimâ, marginibus spiræ subrectis; albescente, rufo-carneo varie maculatâ; anfr. nucl. iv. lævibus, normaliter augentibus, apice minuto, satis extante; norm. v. subrotundatis, suturis satis impressis; aperturâ subrotundatâ, canali acute reflexâ; totâ superficie sulculis æquidistantibus, quarum x. anfr. penult. apparent, insculptâ; anfr. norm. ii. primis costulis quoque radiantibus circ. xvi. haud expressis ornatâ; labro rotundato, extus varicoso, intus sulcidentato; labio valde calloso, supra basim seu parietem expanso, haud extante, intus ruguloso. Long. 0·80, long. spir. 0·43, lat. 0·46, div. 45°. _Hab._ Catalina Island, 30-40 fm.; 15 mostly alive, but few mature; animal white; _Cooper_. This singularly beautiful species probably belongs to the section _Zeuxis_, H. & A. Adams. The callus is slightly reflexed in the best specimen. Genus AMYCLA, H. & A. Adams, 1858. (auctum.) _? Amycla chrysalloidea_, Cpr. n. s. State Collection, No. 613. ? A. t. parvà, eleganter effusâ, marginibus spiræ utrinque excurvatis; albidâ, rufofusco concinne punctatâ seu tinctâ; interdum strigâ albida subsuturali, rufofusco tesselatâ; anfr. nucl. iii. lævibus, haud tumidis, apice declivi; norm. v., t. adolescente planatis, dein tumidioribus, suturis distinctis; totâ superficie elegantissime tenuiter sulcatâ, sulcis æquidistantibus, anfr. penult. circ. xx.; aperturâ flexuosâ subpyriformi; canali oblique sinistrorsum truncatâ, axi quasi umbilicatâ; labro intus acuto, postice sinuato, deorsum quasi tumidiore, intus vii-dentato; columellâ tortâ; labio antice rugis paucioribus interdum munito. Long. 0·37, long. spir. 0·22; lat. 0·14; div. 25°. _Hab._ San Pedro, 1 on beach; San Diego, 30, some alive in 8 fms. on sand, in upper part of bay. _Cooper._ This is one of the most beautiful, but (without a knowledge of either animal, or operculum) most puzzling of the small shells of California. It has relations with _Euryta_, _Truncaria_, _Metula_, and _Daphnella_. Genus ANACHIS, H. & A. Adams. _Anachis subturrita_, Cpr. n. s. A. t. minuta, angusta, Rissoinoideâ, pallide purpureofuscâ, albido maculosâ; anfr. nucl. ? (decollatis); norm. v. subplanatis, suturis distinctis; costulis radiantibus circ. xx. angustis, vix extantibus, parum flexuosis; sculpturâ spirali nullâ; aperturâ quadratâ; labro acuto deorsum tumente, postice sinuato; labio conspicuo; columellâ tortâ, truncatâ. Long. 0·13, long. spir. 0·09, lat. 0·05, div. 30°.