M Y C E T P U S 



Species 3. (JIiis^ r.rit.) 



.MvcF.TOPUS PLICATUS. Mi/r. Ii'^lii hiiiiissimd, cohipressd, 

 I'loiHjdld, ejihJi-rmhh- Icmii imhilii, pus/ice conrentrica 

 luiihilafn, medio o/jlii//ie jilicnid ; htlcri; aidico hn-vis- 

 unio, hianti', complanato ; /alere jios/ico /a/iiiscii/ii, 

 cannVi fovwlato obliqiw riidiato, uiarijbie rt/iitrtdi fiiib- 

 conviwo, terniiiiv ro'iindaUm tniiicaio. 



The TLAiTED Mycetopus. Shell very tliiii, eduiiiressed, 

 elongated, covered vvitli a thin epidermis, posleiiurly 



viridi hridijatd, Iniiii ; hiler,' mitico prodnclo, ler- 

 iji/iiii ruliiiidiitlui HidiiinudniU) ; hdm- poaliro uhtiisi- 





thtnntcatn 



ii,d,ii, dor- 



M'I.\, i 

 Huh. I 



ir ti 



Species 4. ,Mus ? (copied.) 



ropus PYGM.i:us. Mijc. tesld /ndjrhomhoided, liFpi- 

 •ihi, li'iiiiis-fiiiiii. pullldi styihiiiiicd, viridI fasciatd, 

 iliis ricdr m<u;j„nt„rni ■ lalm- aiilico prodiiclu, 

 lido iiiiiiiislh)n\ ti-niiiiio rotiuido ; latere postiro sulj- 

 iin'ij'oruii, rulniidiil'ini (uii/nhito, tenniiio triiiicato. 

 VGMY .MvcKTopus. Shell snbrhomboidal, sinootli, 

 rry thin. |iale straw, banded with green, bright 

 early uilliiii; anterior side produced, a liule iiar- 

 )«tr, end ninnded ; posterior side a little eiiiiei- 



21. liiUqilo 



II in either. 



Species 5. Mus.? (copied.) 

 iivci.TOPLS Weddei.lii. JJi/e. lestd ehuijatd, redd. 



sali ,■/ rmlruli irr/ls, piirnlh'ldiiin. 



\Veddeli,'s Mygetoi'L's. Shell elongated, straight, 

 green, smooth, thin; anterior side produced, end 

 roundly subquadrate ; posterior side obtusely anu'ii- 

 lar, end oblicpiely suljtruncated, dorsal anil ventral 

 margins straight, parallel. 



Ih'Pi:, Kxped. dans TAmer. du Sud, p. ;i:i. pi. :.'(). f. :2. 



Ilab. Saiilii .\iina, de ( lii.piitos, Brazil. 



The elongated, parallel form of this small shell di-tiii- 

 guishes it from others of its genus. 



Species G. (ilus. Cuming in Brit.) 



Mycetopus emaroinatus. MijcteKtalm-hjald, temiis- 

 si.iiid, traiim-ense eloiiijald, einiealo-soleiiiforini, ep'ider- 

 inide ulriidd, lenui, pallidi litled ; latere niitieo breri, 

 aide uinljones oljliqiie iiijlato, infra iihiboiirs i,i pliciim 

 obliquam runtraeto, post plieaiii dr/ire.vsn, inii/ii.slu. 



(jrudatim. rreseeiite ; latere puslirn ennealo, .tidiiajlido, 

 ohliqiie ill mediinii dejireii.so, iiiari/im' lrn,iiii:di trini- 

 er/to, laaripuibim dorsali el oeulrali nrlis. aatiee 

 maijis iipprvxiiiiulix. 



The emakoin'ate Mycbtopus. Shell smooth, very 

 thin, transversely elongated, cuncatc-soleiiiforni, epi- 

 dermis striated, thin, pale yellowish; anterior side 

 short, obliquely inflated in front of the umboes, cou- 

 traeted into an oblique fold below the umboes, de- 

 pressed behind the fold, narrow, gradually enlarging; 

 posterior side euneatc, subinflated, obliquely de- 

 pressed in the middle, terminal margin truncated, 

 dorsal and ventral margins straight, approximating 

 towards the anterior. 



Lea, Obs. Unio, vol. x. p. 



Ilab. Siani. 



.f-)!). 1. .3U." 



There is a sli" 

 this shell, which 1 

 tooth. 



ickeiiiiig of the hinge margin in 



March, ISCS. 



