CLASS GASTROPODA 
155 
clere Theil der Schale von ihm sehr abschiissig gegen den Rand hin abfallt. 
Der braune Flecken im inner der Schale ist nicht bei alien Exemplaren 
verhaltnissmassig gleich gross. Auch hat er nicht bei alien so deutlich 2 
Seitenlappen oder knrze Seitenaste, als es in der gegebenen Abbildung 
(fig. 2) der Fall ist. Dicht an dem Rande der Schale befindet sich inwen- 
dig ein schmaler und gleichmassig dunkelbraun gefarbter Saum. Zwischen 
ihm und dem braunene Flecken hat die innere Flache der Schale nur einen 
leichten Anflung von blaurlicher Farbe. Lange, 1 zoll; grosste Weite, 10 
Linien; Hohe, 5 Linien. (Eschscholtz.) 
Shell oval, apex pointing forward; posterior slope long, convex; an¬ 
terior slope short. Sculptured with strong, rounded ribs, usually nodulous, 
but sometimes obsolete. Whitish, with strips and zigzags of blackish- 
brown or olive-green variegated and speckled with white. Margin cre- 
nated by ribs. Inside white or stained with yellowish-brown, with a large 
central deep brown area, rarely absent; border articulated black and gray. 
(Tryon and Pilsbry, Manual of Conchology.) 
Type in St. Petersburg. Type locality, not known to writer. 
Range. Shumagin Islands, Alaska, to Socorro Island. 
Acmaea persona strigillata Carpenter, 1866 
Supplementary Report, British Association for the Advancement of Science, 1863, 618. 
A. testa A. mesoleucae simili, sed minore, baud viridi; striolis minimis, 
confertissimis, plerumque erosis tenuissime sculpta; albida, strigis olivaceo- 
fuscis, plerumque radiantibus, interdum confluentibus picta; apice saepius 
nigro; intus albida, margine satis lato, strigis tessellato. Long., 9; lat., 74; 
alt., 3 poll. (Carpenter.) 
The shell is ovate, a little wider behind, elevated; apex at the front 
fourth of the length. Young with excessively fine close radiating striae 
crossed by growth-lines, largely worn off in adult specimens. Apex very 
acute in young, eroded, dark brown and polished in ol<i shells. Coloration: 
Marked with irregular, forking black stripes on a white ground, inter¬ 
spersed around the apex when not eroded, with dots and small narrow or 
needle-shaped white streaks. Inside bluish-white, with the central area 
indistinctly irregularly clouded with brown. Border wide, vividly tessel¬ 
lated with blackish-brown. Length, 19; breadth, 14; height, 7 mm. 
(Tryon and Pilsbry, Manual of Conchology .) 
Type in United States National Museum. Type locality ? 
Range. Sitka, Alaska, to Magdalena Bay, Lower California. 
This equals A. strigatella Carpenter. 
[ 757 ] 
