U N 1 



Species i:,i. (Mus. Cmnhvj:.) 



IMo PLATVKllVNtMlL-s. /"//. testii ci/Ii ii(lraci'0-flon(/at<i . 

 latere untwo hrevmimo, posiico vnlile pruihaio, propc 

 nmhonfs amjulato, deiiide compresir trniicalu-roslrato ; 

 nstnlalo-fiiscd, oUvaceo lincld. 



The BitoAD-SNOUTED Unio. Shell cyliiulrirally elon- 

 gated, anterior side very short, posterior nuieh pro- 

 duced, mealed iienr the umboes, then conipressly 

 trimcately lie^ikeil ; burnt-brown, tinged witii olive. 



TiOSSMASSLEU, Icon. f. l:il). - 

 }',no rilhuiilinyns, Zei-ler, 

 U„iu /r/;-/tim-ul,is, I'lidippi. 



JM,. Carinthia. 



Curiously elo ^ 

 having somewhat of tlie 



l)eaked on th 



po>ten(n- side, ai 

 1 of a LttlmtuuiHs. 



Species 1." 



(Ml 



1 FllAGlLIs. I'll, testa ohlongo-ooald, sjdiohliqnd, 

 fi-)iiti, plano-com.pressd, dense mihii/e cuncentrici Jilo- 

 s/i-irilfi, iimbunihiis consjAcue radiatim corrugato-lirutifi, 

 liilerihiis rotitndatis, posiico multo mojore, laliore, 

 obsi'iire obtuse autjidato ; sordide olicuceo-vireiife. 

 I'RAGTLE Unio. Shell oblong-ovate, rather oblique, 

 thin, flatly compressed, densely minutely concentri- 

 cally thread-striated, umboes conspicuously radiately 

 wrinkle-ridged, sides rounded, posterior much tlie 

 larger and broader, obscurely obtusely angled ; dull 

 olive-green. 



INSON, MS. in Mus. Cuming. 

 , Island of Cliiloe, Chili ; Cuming. 



extremely charactc 

 anv North America 



Stic type, dist 



:dl respects 



Species 156. (Mus. Cuming.) 



I) AllCKLANDlcus. Un. tesld oblongu-ovutd, teinii, 

 compressd, coneentrlce dense filo-striuid, mnboidbm 

 radiatim cornit/citu-lirtitis, taleribus rolnndatis, autico 

 lirevissii/io, postico obscure coHvexo-angulalu : nif/ri- 

 cniife-olivaced. 

 Auckland Unio. Shell obloii'r-dvaie, tliin. com- 



pressed, coueeuti-i.-ally densrly tliread->lnated 

 boes ra,lu,t,-ly wrinkie-rulged', .i,le. rounded, 

 rior very short, p,„teri..r oh^curelv couvexlv ai 

 blaekish-,,liv,.. 



(iuAv, :\ts. m Muv Km. 

 //»/>. Auckland, Neu Zealand. 



spe 



:ubar type as t 



Species l.-,7. (Mus. Cuming.) 

 I .Nil) C \i;iNTIIIA<Us. / II. lestn ovato-obtonijd, cmx.ii- 

 ii.scnld. ,jilJwso-enin-e.nl, latere aiitico conreulnr'e jilu- 

 ftriuto, breri, roliindato, postico snb(iciiiiiiiiiilu-roli(ii- 

 dnlo, vix aiujidato ,■ fiduo-olioaced. 

 I'llB CAlUNTiliAN Cmo. Shell ovatclv oblong, nilher 

 lliii-k, gihlidu^ly ciinvex, anterior side coucentrieally 

 thread-.-triateii, short, roiuided, posterior somewhat 



Hub. Caiinlhia.' 



(Jf a 



stiiated 



?pec 



es i: 



fori 



(Mus. Cuming.) 



tslv 



testa iibloiiiju-ovatd, postice 

 ■iiisciilu, latere autico bred. 



10 Xasiivillianus. I 

 snbtrigoiid, teiiui, comp 



rutiuidato, postico deetive SKhiieiiiiiiinito-uiu/ntutu 

 nbulatu ; olivucei 



periie snbulatu ; olivuceo-vinili, uiterduin rirtdi 

 diatd. 



The Nashville L'.mo. Shell oblong-ovate, posteriorly 

 somewhat triangular, thin, rather compressed, antc- 

 lior side short, rounded, posterior slopingly somewhat 

 acuminately angled, slightly winged at the upper 

 part ; olive-green, soraetin:es rayed with green. 



Lka, Trans. Amer. Phil. Soc. 1834; Obs. vol. i. p. 2U'. 

 pi. It. f. +;!. 



llab. Ohio, North America. 



Chiefly distinguished by the posterior side being rather 



acuminately angled, with the upper margin .-lightly 



wiimed. 



