/ 
("929 . sem) FF 4 
.. Cauda eft anguftatum labrum una cum columella elon- . 
gata pofbce produ&um; definens in caza/ez dex- 
trum, finiftrum vel ve&um. 
Concharum valvule numerande funt, zqvalesqvé 
ab ingqvalibus, e&qvilateres ab inzqvilateribus diftingven- . 
J 
de: Partes in bivalvibus maxime obfervande funt: 
Valvulæ, dextra & finiftra, ex partibus conche an- 
ticis.& pofticis determinandz. — | 
X 
Cardines , interius dentati fæpius, valvularum hypa- 
mochlion fub conchz apertura conftituunt, inter- 
dum ope ligamenti cornei exterius coherentes. 
Nates, conche umbones bini, fæpius mucronati, ad 
cardines exterius utrinqve eminentes, 
L cd 
Aures, prominentie aleformes marginales, ad nates 
VES 1 ' ; É 
pofite. — | 
Fulva, xegio conche marginalis, extrorfum figura, 
fpinis, fuleis vel colore diftin&a, ad cardines 
prope nates fita, claufæ conchee utramqve teftam, 
-rimula fepe hiantem, qvafi conne&tens. 
nus, regio conchæ marginalis exterior, impresfione 
vel colore:diftin&da, e regiene vulve pone inter- 
je&as nates fita; binas valvulas combinans, 
1 
Lünubus 
