U N I . 



Plate XXI. 



Fi-. 91. (Mils. Cuming.) 



The shell here figured is a typical speciiuLMi of th 



I'liiu aU'i- of Nilssoii, which h:is been prouoiiuci-d by Le 



to be one of the nuuierons European fornix of MiinjariUub 



Maryarllifirn. 



Species 92. (Mns. Cuming.) 



Unio meli.eu.s. Tin. lestn oblonyu-ovatd, coiHprenuimcidd, 

 pudice eUlpllco-expansd, latere anlico rotnndato, pos- 

 tico obsolete migulato, conceiitrice dense Urnto-striald, 

 ad itiiihones plinafo-corrugatd ; oUviiceo-stnimined. 



Tmo HONEY Unio. Shell oblong-ovate, rather com- 

 pressed, posteriorly elliptically expanded, anterior 

 side rounded, posterior obsoletely angled, densely 

 concentrically riilge-striatcd, plicntely wrinkled at the 

 uinboes; olive ^traw-colour. 



Le 



Pro. Acad. Nat. Sci. Philad. 1S59, p. 1 

 vol. vii. p. 68. pi. 38. f. 109. 



an olive straw-eolour, elliptically expa 

 ly ridge-striated throughout, with the ui 

 •'wrinkled. 



Obs 



Species 93. (Mus. Cnniing.) 



Unio Patagonicus. Un. testa eUiptko-ovatd, coiiipres- 

 siiisc/ild, pustlce obtuse anyulatd, latere antico rotun- 

 dato, postico expaiiso, cunceiitria- filo-striatd ; nigri- 

 cante-fused. 

 The Patagonian Unio. Shell elliptically ovate, rather 

 compressed, posteriorly obtusely angled, anterior side 

 rounded, posterior expanded, concentrically thread- 

 striated; dark-brown. 

 D'OlUilGNY, Voy. dans I'Anier. Mend. pi. 70. f. 1 to 4. 

 JIab. Patagonia. 



A rather compressed elliptieally-ovate shell, concentri- 

 cally thread-striated throughout. 



Species 9i. (Mus. Cuming.) 

 Unio naslitus. Un. testa eloitgato-ovatd, latere antico 

 rotuiidato, posiico elliptico-aiigiilato, versus extremita- 

 ti'M acnmlnalo-rostraio ; nigricante-olhaced, viridi 

 ohsenre rudiiitd. 



The liEAKEU Unio. Shell elongately ovate, anterior 

 side rounded, posterior elliptically angled, aciimi- 

 nately beaked towards the extremity ; dark-olive, ob- 

 scurely rayed with green. 



Say, Swainson, Zool. lllus. 1st Series. 

 3I^a nasulu. Wood. 

 Uino rostratus, Valenciennes. 

 E/iri/nea nnsuta, Stimpson. 



Hab. North America. 



Distinguished 

 tremitv. 



itieally-beaked po^t^ 



S|)eeies 9.5. (IMus. Cuming.) 

 Unio FrsCATUS. I'n. testa oblougo-ovald. latere aiilicu 



rotitndato, postico arciifito-siibqKudruto, vir. angnlatii ; 



11 hjrican te-olivuced. 

 The brown Unio. Shell oblong-ovate, anterior side 



rounded, posterior arcuately subquailrate, scarcely 



angled; dark-olive. 

 Lea, Trans. Amer. Phil. Soc. 1843. Obs. vul. iv. p. 3.5. 



pi. 40. f. 4. 

 Hab. Florida, North America. 



The poster 

 or truncated. 



species 13 somewhat : 



Species 9G. (Mns. Cuming.) 



Unio Shanghaiensis. Uh. testa elongato-ovatd, (jtb- 

 bosd, latere antico rotmtdaio, postico eUiptico-aciimi- 

 itato ; nigrieaute-viridi . 



The Shanghai Unio. Shell elongately ovate, gibbons, 

 anterior side rounded, posterior elliptically acumi- 

 nated ; dark-green. 



Lea, Pro. Acad. Nat. Sci. Philad. 1S59, p. 153. Obs. 

 vol. vii. p. (iO. pi. 36. f. 121. 



Ilab. Shanghai, China. 



A narrowly-ovate shell, conspicuously gibbous in form. 



A brii 



:d fi-Ul 



Fig. 97. (Mus. Cuming.) 

 Iit-coloured variety of U. Jiiodaiitdides, dcseribi 

 Hi from an older specimen at PI. XL\. Sp. 87. 



April, ISO 



