66 
MARINE SHELLS OF WEST COAST OF NORTH AMERICA 
Lacuna divaricata Fabricius, 1780 
Fauna Gronlandica, 392. Tryon, Manual of Conchology, 9: PI. 50, fig. 76. 
Trochus testa subumbilicata ousta, infractu onfimo remotiore, umbilico 
subconsolidato. Long., ; lat., 3 Hn. (Fabricius.) 
Testa oblonga, subconica, spira satis obliqua, laeuis, diaphana, glabra 
non nisi oculo armato subtilissime reticulata. Anfractus 6 convexi, sursum 
valde decrescentes: insimus enim reliquis simul sumtis dimidio major, 
ventricosus, et sutura sua versus aperturam remotuor. Apertura sublunaris 
ampla, labro renui marginato. Columella rimam lanceolatam habet, de 
plica interiore adiacente fere clausam. Color viridia 3 fasciis ferrugineis 
in anfractu maiore, quarum duae subtus approximatae, tertia supra 
remota: hae fasciae in anfractibus reliquis confluunt, ut inde ferruginei 
fere toti euadant. Intus polita est, concolor, fasciis in apertura trans- 
parentibus, columella tamen et suprema pars faucis albae. Operculum 
natiuum oblongum, planum, saturate viride. Vermem non vidi. ( Fabricius.) 
Obliquely conical, periphery obtusely angulated, somewhat thin, trans¬ 
lucent and glossy, with slight, numerous, spiral striae; white, yellowish, or 
yellowish brown, often with four brown bands of varying width, some¬ 
times confluent into one band, and so disposed as to exhibit a white band 
just below the suture. (Tryon.) 
Type in Museum Copenhagen. Type locality ? 
Range. Norton Sound, Alaska, and south to Santa Barbara, Cali for- * 
nia; Northern Europe; and Greenland. Fossil, Pliocene. 
Lacuna variegata Carpenter, 1864 
Supplementary Report, British Association for the Advancement of Science, 656. An¬ 
nals and Magazine of Natural History , ser. 3, 14:428. 
L. testa tenui, plus minusve elevata, soluta, irregulari; adolescente 
fusco-purpureo; adulta livida, radiatim seu diagonaliter varie irregulariter 
strigata, strigis fusco-aurantiacis, saepe ziezaeformibus; anfr. vi., quorum 
primi compacti, apice submamillato; dein solutis, postice planatis, antice 
expansis; basi rotundata seu angulata; apertura subovata; labio- postice 
porrecto; labio saepe partiem vix attingente; columella intus recta, estus 
valde lacunata. Long., 3; long, spir., 16; lat., 17 poll. (Carpenter.) 
Thin, expanded in front, periphery rounded or obtusely angulated, 
smooth, polished fulvus, irregularly striate with chestnut, with frequently 
a peripheral band of white spots and sometimes another below the suture. 
(Tryon, Manual of Conchology.) 
Type in United States National Museum. Type locality, Neah Bay, 
Washington. 
Range. Neah Bay, Washington, to Monterey, California. 
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