CLASS GASTROPODA 
63 
Littorina subrotundata Carpenter, 1865 
Annals and Magazine of Natural History, ser. 3, 15:28. 
A. testa baud parva, laevi, tenui, fusco-olivacea; anfr. nucl.? . . . 
(decollatis) ; norm, v., rapide augentibus, subrotundatis; marginibus 
spirae rectis, suturis valde impressis; basi rotundata, haud umbilicata; 
apertura rotundato-ovali, intus fuscescente; peritremate continuo; labro 
acuto; labio parum calloso; columella arcuata. Long., 28; long, spir., 13; 
lat., 2 poll. (Carpenter.) 
Type in United States National Museum. Type locality, Neah Bay, 
Washington. 
Range. Known only from type locality. 
Described as Assiminca. 
Littorina castanea Carpenter, 1865 
Annals and Magazine of Natural History, 15:28. 
P. testa compacta, solidiore, fusco-castanea, marginibus spirae rectiori- 
bus; rugulosa, lineis distantibus spiralibus irregulariter insculpta; anfr. 
nucleosis? . . . (detritis), vertice late mammillato; norm, iv., rapidius 
augentibus, tumidioribus, suturis satis impressis; basi regulariter excur- 
vata, vix rimata; apertura suborbiculari, haud continua; labro acuto; labio 
supra parietem obsoleto, supra columellam arcuatam intus calloso; oper- 
culo, anfr. iv. haud rapide augentibus. Long., .21, long, spir., .09; lat., .17, 
div., 70. (Carpenter.) 
Shell compact, rather solid, tawny-chestnut, with rather straight mar¬ 
gins of the spire; rugose, sculptured irregularly with distant spiral lines; 
nuclear whorl worn, with vertex broadly mamillate; normal whorls 4, 
growing rather rapidly, thick, with strongly impressed sutures; basis regu¬ 
larly excurvate, scarcely rimate; aperture suborbicular, not continuous; 
with outer lip acute; inner lip obsolete above the wall, within callous above 
the arcuate columella; operculum with four whorls, not rapidly increasing. 
(Translation.) 
Type in United States National Museum. Type locality, Neah Bay, 
Washington. 
Range. Known only from the type locality. 
Described as Paludinella castanea. (Carpenter.) 
Family LACUNIDAE 
Genus LACUNA Turton, 1827 
Shell turbinated or globular, thin, covered by an epidermis; aperture 
semilunar, columella flattened, with a parallel groove behind it ending in 
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