) n6 ( 



5. A n o d o n t a p i s c i n a 1 !#• 



A. testa elliptico-ouata, ventricosa, subradinta, 

 anterins rotundata, posterius producta angulata; 



pube compressa, aurita; natibus jjrominulis coin- 

 dntisj ab extremitate rcmotis, umbonibus tumidis. 

 Diani. transv. ic5; long. 60 millim. 



Mytilus cygnens, Selirpt. Flussconch. p. i5o. t. 3. f. 1. 



Anodonta anatina, praparn. t. n. f. 2. 



Anodonta trapesialis, Lamarck Hist. dcs anim. s. 



vert. Vl. 1. p. 87? — Chemn. conch. t. 8G.f. 762:? 

 Tcsta elliptico-ovata ventricosa, crassiuscula, 

 anlcrius rotunda, postcrius producta, anguiata ; epi- 

 dermide luleo-viridi, interdum paliide lutea, vestita, 

 iineis saturatioribus, eonfertis, magis vel minus con- 

 spicuis radiata, striis transversis & rugis zonaefor- 

 jnibus fuseis notata. Margo snperior reclus postice 

 jn anguium terminatus; pone hunc angulum margo 

 tesu-e superior & ppsterior rectus vel concavus, c\- 

 trcmitate ipsa truncata. JVates ab extremitate antica 

 remotcB, prominulae, coindutce, rubrae, umboniJ)us tu- 

 ipitlis pallide cinereis. 



Obs. Quoad formam generalem ad antecedentem 

 proxime aecedit ; diflert tamen evidenter testa ma- 

 jori, magis vcntricosa, valvisque crassioribus, & prae- 

 sertkri natibus ab extremitate remotioribus, promi- 

 nulis, nmbonibusque tumidis. Gum Anod. cygnea, 

 qualis a Pcnnant, Schroter, Pfeijfer &c. delineatur, 

 eoafundi vix potest, & ab Anod. sulcata magis adhuc 



dif- 



