Margarita Leach, 1819.
Margarita acuticostata Carp. n. sp. State Collection, Species 354.
M. t. M. lirulatæ simili; parvâ, tenui, albido-cinereâ, olivaceo-fusco varie maculatâ, seu punctulatâ; anfr. nucleosis ii. lævibus, tumidis, fuscis, apice mamillato; anfr. norm. iii. tumidis, tabulatis, suturis rectangulatis; carinis acutis in spirâ iii., quartâ peripheriali, æquidistantibus; interstitiis spiraliter striatis; in spirâ et circâ basim radiatim creberrime striulatis; basi subrotundatà, lirulis distantibus circ. ix. ornatâ; umbilico magno, infundibuliformi, vix angulato, intus interdum striis spiralibus paucis sculpto; aperturâ subrotundatâ, pariete parum attingente: operculo anfr. paucioribus, circ. vi. suturis subelevatis.
Long. 0.18, long. spir. 0.12, lat. 0.19, div. 87°.
Hab. Santa Barbara, in kelp-root, 2, dead; Catalina Island, 8-10 fms. 20, some alive; Monterey, 20 fms. 4, dead.
This shell might be taken for a delicate form of Gibbula parcipicta, which in painting it exactly resembles. It is known from the Vancouver M. lirulata by the three sharp keels on the spire, between which there are no others intercalating, and by the details of sculpture. The patches of color are very variable, sometimes scarcely appearing; and are generally deeper tinted on the keels, giving a false appearance of granulation.
Margarita salmonea Carp. (? var.) State Collection, Species 352.
M. t. inter M. undulatæ et M. pupillæ intermediâ; minore, spirâ satis elevatâ; anfr. nucl. iii. purpureis; dein iv. normalibus, colore salmoneo; liris spiralibus in spirâ viii., quarum ii. suturales, minimæ; suturis haud undulatis; interstitiis à lineis incrementi creberrimis, haud elevatis, sculptis; basi lirulis creberrimis, æqualibus, circ. xviii. ornatâ; aperturâ subquadratâ; umbilico minore, angulato: operculo tenuissimo, diaphano, anfr. circ. x. vix definitis.
Long. 0.22, long. spir. 0.14, lat. 0.22, div. 80°.