Notices respecting New Books. 381 



Prof. Vanuxem. Cabinet of the New York Lyceum. Cabinet of Dr. 

 Mitchill. Cabinet of the Academy of Natural Sciences. Alasmodonta 

 complanata. Barnes. Diam. *9 — 1*4 inch, length from beaks to 

 base 3 inches, breadth 5 inches, length from the top of the wing 

 4*3 — 45 inches. 



5. Symphynota compressa. — Testa transversim elongatd, ince- 

 quilaterali, valde compressa, ellipticd ; valvulis tenuibus ; natibus sub- 

 prominalis, undulatis ; detite cardinnli prominente ; laterali parvo. 



Hab. Ohio. T. G. Lea. Norman's Kill, near Albany. Dr. Eights. 

 My cabinet. Cabinet of Prof. Vanuxem. Cabinet of Dr. Eights. Ca- 

 binet of P. H. Nicklin. Cabinet of the Academy of Natural Sciences. 

 Cabinet of the New York Lyceum. Diam. # 8, length 1*7, breadth 

 2'8 inches. 



6. Symphynota gracilis. — Testa sub-triangulari-ovatd , incequi- 

 laterali, transversim rugosd, sub-compressd ; valvulis tenuibus fragili- 

 busque ; mar gine posteriori dor sail sub-alatd, connatdque ; dente car- 

 dinali in valvuld dextrd elevato, recurvo ; natibus sub-prominulis ; 

 ligamento celato $ margaritd violaceo-purpured et iridescente. 



Hab. Ohio. T. G. Lea. Wisconsan. Mr. Schoolcraft. My cabinet. 

 Cabinet of Mr. Barnes. Cabinet of Prof. Vanuxem. Cabinet of P. H. 

 Nicklin. Cabinet of Mr. Swainson. Cabinet of the New York Lyceum. 

 Cabinet of the Academy of Natural Sciences. Unio gracilis. Barnes. 

 Silliman's Amer. Journ. vol. vi. p. 174. Unio fragilis. Swainson. 

 Unio planus. Barnes. Diam. 1 — 1*2, length 2-2 — 2*5 breadth 3"1 

 — 4 - l inches. 



7. Symphynota tenuissima. — Testa angusto-ellipticd, incequi- 

 laterali, transversim rugosd, compressa ; valvulis tenuissimis fragilli- 

 misque ; margine dorsali connatd ; dente car dinali prominentia exigud, 

 laterali unico et aciculari in valvuld utrdque ; natibus depressis ; liga- 

 mento celato ; margaritd cosruleo-albd et purpurea, iridescente. 



Hab. Ohio. T. G. Lea. My cabinet. Cabinet of T. G. Lea. Ca- 

 binet of Prof. Vanuxem. Cabinet of P. H. Nicklin. Diam. *6, 

 length 2*2, breadth 2'5 inches. 



8. Symphynota ochracea. — Testa sub-ovatd, incequilaterali, 

 transversim rugosd, inflatd ; valvulis post ligamentum connatis, tenui- 

 bus, fragilibus, et sine aid ; dentibus cardinalibus et lateralibus curvam 

 lineam facientibus ; natibus prominentibus ; ligamento conspicuo ; mar- 

 garitd cxruleo-albd ei ochracea. 



Hab. Schuylkill and Delaware. My cabinet. Cabinet of Mr. Say. 

 Cabinet of Prof. Vanuxem. Cabinet of Mr. Hyde. Cabinet of the 

 Academy of Natural Sciences. Cabinet of Dr. Griffith. Cabinet of 

 P. H. Nicklin. Peale's Museum. Unio ochruceus. Say. Nicholson's 

 Encyclopaedia, Art. Am. Conchol. pi. 2. fig. 8. Diam. 1*3, length 1*9, 

 breadth 2 - 9 inches. 



9. Symphynota cygnea. — Testa ovatd, antice lata et rotundatd, 

 irregulariter transversim rugosd ; natibus retusis ; valvulis tenuibus et 

 post ligamentum connatis. 



Hab. rivers and lakes of Europe. My cabinet. Mytilus cygneus. 

 Linn. Gmel. p. 3555. Anodonta cygnea. Lam. 



LIX. Pro- 



