Q3on ben <Butmertu 4*1 



T. Dattylus, t>\i ©attelmttß&et P. tefta ob- 

 longa hinc reticulato ftriata, * 



£)a$ £hier fefjbft p&o$p&ore$ctrt überaus tyetl 

 im ©uncflen* 



CONCHAE. 



©te #au£tmfd)iebenfyett bei: ©efdjledjter 6e* 

 rufyt auf ber ©lei*()eit ober ltngletd^(>eit ber frei* 

 ben ©efcaalen unb tfrrer Slduber. SSerfdjiebne 

 9J?uf*elu tiberben au* buv* bie perlen merk 

 wurbig, bie ftcfo jum £l)eil im£l)ier felbji, t&ettö 

 aber au* innwenbig au ber ©cfcaale fuiben, unb 

 bereu <£ntflebungöart Up* m*t ju&erlafilg eut* 

 f*iebeu ijf. 



m ya. Tefta bivalvis, hians altera extre- 

 mitate. Cardo dente (plerisque) folido> 

 craflb, patuio, vacqov nec inferto teftae op- 

 pofitae, 



1. f Pittorum, bie Slu$\nuf$el, XttcXyUv* 

 mttf*eL M. tefta ovata , carc}inis dente pri- 

 mario crenulato: laterali kmgitudinali : al- 

 terius duplicato* * 



2. f Margaritifera t t>ie Perlenmitfdjel M. 

 tefta ovata antice coarftata, cardinis dente 

 primario co&icq , natibus decorticatis. Ä 



34. solen, tHefietjcfretöe* Tefta bivalvis, 

 oblonga , utroque latere hians. Cardo dens 

 fubuktus, reflexus, faepe duplex, non in- 

 fertus teftae oppofitae: margo lateralis ptv 

 foletior. 



£> b 3 % Si- 



