200 
Embla n. g. 
T. aequivalvis, postice 
hians, truncata; ligamen- 
tum internum c foveaeutri- 
usque valvae insertum, an¬ 
te quam in v. d. dens car- 
dinalis bj, in v. s. fossa car- 
dinalis b'y in v. s. dens la¬ 
teralis anticus a et posti- 
eus d, in v. d. fossa late¬ 
ralis d'j dentes laterales nulli. Impressio palliaris lata, duplicata, 
postice leviter sinuosa. Animal pallio ventre aperto, postice longe 
cirrigero, siphonibus instructum. Specimen unicum mancum vidi. 
319. E. Koren ii n. — T. ovata, ventricosa, suboequilatera, antice 
rotundata, postice truncata, alba, aculeis minutissimis creberri- 
mis truncatis aspera, epidermide tenui; umbones prominentes, 
paullum ante medium siti, incurvi et antrorsum flexi; lunula 
distincta, brevissima, lata; margo lunularis leviter concavus, li- 
gamentalis nonnihil arcuatus, ventralis levissime sinuatus, posti — 
cus angulato-truncatus, hians, plica subduplicata obsoleta ab 
angulo inferiore ad umbonem currente; cardo v. s.: dens latera¬ 
lis anticus a obsoletus, marginalis; fossa cardinalis b' profunda, 
rotundato-trigona, infra aperta; fovea ligamenti c subovalis, lon- 
gitudinalis, antice et infra callo definita, postice aperta; dens 
posticus d laminaceus, marginalis; cardo v. d.: dens card. b bre¬ 
vis, validus, prominens, apice truncato fissus, superne sulcatus; 
fovea ligamenti c oblonga, obliqua, fossa postica d', illae proxi- 
ma, triangularis; impressio muscularis antica ovata, posterior 
major, rotundata, utraque superne lobo aucta; impressio pallia- 
ris interna lacera, postice sinu levi, externa integra; mm. 
(Koren dd.) Bergen. 
Thracia Leach. 
320. T. convexa (Mya) Wood, (Anatina) Turt. , (Amphidesma) Flmg., 
(Thracia) Brown, Thorpe, = T. declivis Macg. Bob. 
321. T. phaseolina (Amphidesma) Lamk. , (Thracia) Kiener, Couth., 
Phil., annon — A. declivis Turt.? (non Penn., Don. 82, Brown 
quae = M. pubescens Pult.), annon = T. .pubescens Macg. 
—• Processus cardinalis longitudinalis, subangustus, sed quam 
in praecedente nonnihil robustior, ossiculum validum; testa te- 
nuissime scabra. 
322. T. distorta (Mya) Mont., Dillw., (Anatina) Turt. — Processus 
cardinalis prominulus, semiovalis; ossiculum validum; sinus pal- 
•-n-jss 
