282 
MARINE SHELLS OF WEST COAST OF NORTH AMERICA 
deep, slightly recurved. Height of shell, 13.5; of last whorl, 10; of aper¬ 
ture, 6.5; diameter, 7 mm. (Dali.) 
Type in United States National Museum, No. 12285. Type locality, 
Laguna Beach, California. 
Range. Laguna Beach to San Diego, California. 
Amphissa versicolor cymata Dali, 1916 
Nautilus, 30:27. 
Shell with distinct brown axially waved lines on a white ground. 
(Dali.) 
Type in United States National Museum. Type locality, California. 
Amphissa undata Carpenter, 1864 
Supplementary Report, British Association for the Advancement of Science, 148. Pro¬ 
ceedings of the California Academy of Sciences, 3:158. Keep, West Coast Shells, 
fig. 163. 
A. t. parva, rufo-fusca, turrita, epidermide tenui induta; marginibus 
spire subrectis; anfr. nucleosis iv. laevibus, tumidis, apice mamillato; anfr. 
normalibus v. valde tumidis, suturis impressis; costis radiantibus ix. valde 
tumidis, latis, antice et postice obsoletis; interstitiis undatis; liris spiralibus 
acutioribus, distantibus, costas superantibus, secundum interstitia eleganter 
undulatis, quaruni vi.-viii. in spira monstrantur; apertura ovali, in canalem 
brevem rectam producta, intus haud lirata; labro acuto, labio acuto extanti 
ad suturam juncto; columella planata; operculo nassoideo. Long., 0.44; 
long, spira, 0.20; lat., 0.20 poll. (Carpenter.) 
Shell small, turreted, the nuclear whorls smooth, tumid, with mammil- 
late apex, the others longitudinally ribbed, the ribs nine in number, obso¬ 
lete anteriorly and posteriorly, with distant acute spiral lirae; aperture 
oval, with a short, straight canal, outer lip acute, not lirate within; color 
reddish-brown, under a thin epidermis. (Tryon, Manual of Conchology.) 
Type in State Collection, Species 1067. Type locality, Catalina Island. 
Range. Monterey, California, to Cerros Island, Lower California. 
Amphissa bicolor Dali, 1892 
Proceedings of the United States National Museum, 15:213; PI. 20, fig. 4. 
Shell small, pale with brown bands and six convex whorls; nucleus 
eroded in the specimens; suture distinct, not appressed, whorls full, with 
11 to 13 narrow rounded ribs extending nearly from suture to suture; 
spiral sculpture of numerous flattened strap-like cinguli separated by sub¬ 
equal channeled shallow interspaces; epidermis thin and yellowish; color 
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