34 
MARINE SHELLS OF WEST COAST OF NORTH AMERICA 
Die Schaale 13 Linien lang, die grosste Breite betragt 7 Linien; ihre 
Farbe ist hellbraunlich. Die Spindel bildet einen zugespitzten Kegel; die 
Windungen sind schwach gewolbt und mit blatterformigen ziemlich dicken 
und ganzstandigen Erhohungen besetzt, welche am obern Rande der Win¬ 
dungen in eine spitze heraufratende Ecke zusammengefaltet sind; man 
zahlt ihrer auf der letzten Windung 9 bis 11. Die Oeffnung ist langlich 
rund, die dicke breite aussere Lippe ganzrandig, die innere Lippe auf der 
Saule aufliegend, beide stark glanzend und etwas braunlich roth geflect. 
Der Kanal ist nicht viel kurzer als die Oeffnung, breit, offen und ziemlich 
gerade; der Nabel verdeckt. (Eschscholtz.) 
Shell small, fusiform, whorls five, angular above, with twelve to four¬ 
teen raised varices; no spiral sculpture; aperture subelliptical; outer lip not 
effuse; inner lip smooth ; canal short, slightly curved. Long., 10.5 ; lat., 4.5 ; 
body whorl, 7; aperture, including canal, 5; canal, 1 mm. (Arnold.) 
Type in ? Type locality, Sitka, Alaska. 
Range. Nunivak Island, Bering Sea, to San Pedro, California. Also 
northern Japan. Fossil: Pleistocene—Santa Barbara, San Pedro, California. 
Trophon alaskanus Dali, 1902 
Proceedings of the United States National Museum, 24:545. 
Shell creamy-white with a more translucent substratum, the nucleus 
eroded, and five subsequent whorls; the whorls are rounded and bear eight 
narrow varices which are only prominent at the shoulder where they rise 
into long blunt spines which curve backward and somewhat toward the axis 
of the shell; there is no spiral sculpture, the incremental lines are not con¬ 
spicuous, but magnification shows the surface when not eroded to be cov¬ 
ered with a fine, sagrinate or subgranular sculpture, unlike anything I have 
noted on the other species. The spire is elevated, the suture very distinct, 
the canal slender, long, and strongly curved; the aperture is subovate, the 
pillar white and polished, the outer lip thin and slightly patulous opposite 
the base of the pillar. Alt. of shell, 32; of spire (nucleus missing), 12; 
max. diam. of shell, exclusive of the spines, 14 mm. (Dali.) 
Type in United States National Museum, No. 122594. Type locality, 
United States Fish Commission, Station 3227, Bering Sea, north of Un- 
alaska, m 225 fathoms. 
Range. Known only from type locality. 
Trophon avalonensis Dali, 1902 
Plate 33, fig. 9 
Proceedings of United States National Museum, 24:546. 
Shell small, delicate, white, fusiform, with V/ 2 nuclear and five subse¬ 
quent w lorls, nucleus tilted, rounded, smooth; subsequent whorls finely 
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