No. 1704. A COLLECTION OF SHELLS FROM PHRU—DALL. 167 
interior livid purple brown or whitish; pillar with three prominent 
plaits; no operculum. Species of no economic importance. 
This species is one of a group of black Mitras characteristic of the 
west coast of the two Americas from California to Valparaiso. These 
shells have been generally confounded together on account of their 
general similarity, and the fact that specimens obtained are usually 
in poor condition, the periostracum at least being almost invariably 
defective. 
SOLENOSTEIRA FUSIFORMIS Blainville. 
Plate 22, fig. 3. 
Purpura fusiformis BLAINVILLE, Nouv. Ann. du Muséum, Paris, vol. 1, 1832, 
1. Gil, Jou, Mil, iit, Te 
Dredged in Sechura Bay, west of Matacaballa, in about 5 fathoms. Also found at 
the Chincha Islands on the shores. 
Mstribution.—From Panama southward to the Chincha Islands. 
Shell ovate, turrited, ventricose, white, covered with a _ thick 
lamellose dark olive periostracum; whorls convex, carinated, tuber- 
culous above; the tubercles elevated and compressed; aperture 
ovate, white; columella smooth; base narrowly umbilicated; canal 
short, flaring. Operculum elongate with an apical nucleus. 
This shell has much similarity to the Thais kiosquiformis, with 
which it has very generally been associated. It can be distinguished 
by the absence of the lamellose sutural band of the Thais and the 
entirely distinct operculum. 
COLUMBELLA PAYTENSIS Lesson. 
Columbella paytensis Lesson, Voy. Coquille, vol. 2, 1830, pt. 1, p. 402—SowrrBy, 
Thes. Conch., Columbella, p. 116, pl. 36, figs. 36-37. - 
Dredged in Sechura Bay west of Matacaballa, in about 5 fathoms. Also obtained 
at Lobos de Afuera Island. 
Mstribution.—Central American coast southward to Sechura Bay, 
and at the Galapagos Islands. 
Shell small, stout, with a short spire and narrow aperture; whorls 
broadly channeled below the sutures; chestnut brown, more or less 
dotted with white; outer lip internally denticulated, a few tubercles 
on the pillar; aperture within whitish or purple; length about 25 mm. 
ANACHIS RUGOSA Sowerby. 
Columbella rugosa SowreRBy, Proc. Zool. Soc. of London, for 1832, p. 115.— 
KiENER, Icon., Columbella, 1839, p. 46, pl. 16, fig. 4, 1839 (as C. bicolor 
Kiener). 
On oysters, at Matapalo, near Capon. 
Mstribution.—Gulf of California southward to Paita, Peru. 
Shell small, ovate, tuberculate, plicate or rudely ribbed axially, 
the ribs only developed on the upper half of the body whorl; whole 
