190 
271. Strigilla interrupta Mörch. T, orbieu- 
laris, obliqua inaequilateralis, planiuscula, candida, pellu- 
cıda, subperpendiculariter sulcata; sulei antice area laevi- 
gata interrupti, ad marginem anticum suleis distantibus fere 
horizontalibus, postice area trianguları lineis subtilibus sub 
angulo acutissimo fractis. Long. 51/,, alt. 42/, mill. — 
Sonsonate valv. solit. sinistr, 
Die Streifung hat am meisten Aehnlichkeit mit 268. 
272. Semele fucata Mörch. T. orbiculari-ovalis, 
inaequilateralis, postice brevior, antice late rotundata, po- 
stice rotundato - truncata, margine dorsali antico declivi, 
postico procipite declivi, margine ventrali convexiusculo; 
subtilissime radıatim et confertissime striata; striis postice 
divergentibus, striis incrementi postice fortioribus. Color 
albus, intus macula lata rufescente versus umbones satura- 
tiore pellucente. Sinus palliaris latus rotundatus, Long: 14, 
alt. 12 mill. 
Var. #. orbieularis umbonibus utrinque radio brevi 
coceineo. Long. 11, alt. 10 mill. 
Var. y. candida, planata. Long. 91/,, alt. 81, mill. 
(Valv. solit. 2.) 
Sonsonate. — 8. bicolor Ad. Pan. sh. p. 288 differt 
solum „t. postice majore.“ — S$. lentieularis Sow. Proc. 
1832. p. 200. Il. f. 9, Hanl. t. 12. f. 49 diftert margine 
ventrali rotundato, S. rubrolineata Conr., Hanl. t. 12. f. 44 
differt parte postica longiore et subacuminata. 
273. Semele (Amphidesma) verrucosa Mörch, 
T. ovalıs, solida, concentrice costulata, in valva sinistra 
antice- posticeque, in valva dextra fere ubique radiatim sul- 
cata unde verrucosa, antice longius coarctata, rotundata, 
postice perpendiculariter rotundato-truncata; margo dorsalis 
anticus parum declivis, posticus valde declivis brevis, nodu- 
losus, margo ventralis parum arcuatus. Color flavescens, 
maculis rufescentibus angulatim digestis, margo dorsalis 
fasciatım maculatus, intus lacteo-iridescens. Sinus palliaris 
